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Sync'ed JSBSim

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* Removed the IAS dependency to the Pitot tube angle (real Pitot tube are less sensitive to AoA than was simulated)
* Removed the class FGUDPOutputSocket which was redundant with FGOutputSocket
* Added a new type of functions "template" which are intended to prevent duplication of functions. For now, they are available to compute output values and script notifications.
* Aerodynamics forces can now be specified in stability axes.
* Density altitude and pressure altitude are computed according to ISA standard atmosphere 1976.

New properties:
* Flight path angle (gamma) in degrees
  - fdm/jsbsim/flight-path/gamma-deg
* Aerodynamics forces in stability axes
  - fdm/jsbsim/forces/fsx-aero-lbs
  - fdm/jsbsim/forces/fsy-aero-lbs
  - fdm/jsbsim/forces/fsz-aero-lbs
* Aerodynamics moments in stability axes
  - moments/roll-stab-aero-lbsft
  - moments/pitch-stab-aero-lbsft
  - moments/yaw-stab-aero-lbsft
* Pause JSBSim
  - fdm/jsbsim/simulation/pause

* Fixed multiple bugs.
This commit is contained in:
Bertrand Coconnier 2018-06-19 23:08:07 +02:00
parent ccabc052bc
commit 6d83e6978d
59 changed files with 1121 additions and 859 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
src/FDM/JSBSim/CMakeLists.txt
View file

@ -23,7 +23,6 @@ set(HEADERS
input_output/FGOutputFG.h
input_output/FGOutputFile.h
input_output/FGOutputSocket.h
input_output/FGUDPOutputSocket.h
input_output/FGOutputTextFile.h
input_output/FGOutputType.h
input_output/FGModelLoader.h
@ -40,6 +39,8 @@ set(HEADERS
math/FGRealValue.h
math/FGRungeKutta.h
math/FGTable.h
math/FGFunctionValue.h
math/FGTemplateFunc.h
models/FGAccelerations.h
models/FGAerodynamics.h
models/FGAircraft.h
@ -117,7 +118,6 @@ set(SOURCES
input_output/FGOutputFG.cpp
input_output/FGOutputFile.cpp
input_output/FGOutputSocket.cpp
input_output/FGUDPOutputSocket.cpp
input_output/FGOutputTextFile.cpp
input_output/FGOutputType.cpp
input_output/FGModelLoader.cpp
@ -191,6 +191,8 @@ set(SOURCES
add_library(JSBSim STATIC ${SOURCES} ${HEADERS})
set(VERSION_MESSAGE "compiled from FlightGear ${FLIGHTGEAR_VERSION}")
add_definitions("-DJSBSIM_VERSION=\"${VERSION_MESSAGE}\"")
target_link_libraries(JSBSim SimGearCore)
target_include_directories(JSBSim PRIVATE ${CMAKE_SOURCE_DIR}/src/FDM/JSBSim)

2
src/FDM/JSBSim/FGFDMExec.cpp
View file

@ -169,6 +169,7 @@ FGFDMExec::FGFDMExec(FGPropertyManager* root, unsigned int* fdmctr) : Root(root)
instance->Tie("simulation/disperse", this, &FGFDMExec::GetDisperse);
instance->Tie("simulation/randomseed", this, (iPMF)&FGFDMExec::SRand, &FGFDMExec::SRand, false);
instance->Tie("simulation/terminate", (int *)&Terminate);
instance->Tie("simulation/pause", (int *)&holding);
instance->Tie("simulation/sim-time-sec", this, &FGFDMExec::GetSimTime);
instance->Tie("simulation/dt", this, &FGFDMExec::GetDeltaT);
instance->Tie("simulation/jsbsim-debug", this, &FGFDMExec::GetDebugLevel, &FGFDMExec::SetDebugLevel);
@ -540,7 +541,6 @@ void FGFDMExec::LoadModelConstants(void)
Aerodynamics->in.Wingspan = Aircraft->GetWingSpan();
Auxiliary->in.Wingspan = Aircraft->GetWingSpan();
Auxiliary->in.Wingchord = Aircraft->Getcbar();
Auxiliary->in.PitotAngle = Aircraft->GetPitotAngle();
GroundReactions->in.vXYZcg = MassBalance->GetXYZcg();
LoadPlanetConstants();

8
src/FDM/JSBSim/FGJSBBase.cpp
View file

@ -86,15 +86,11 @@ const double FGJSBBase::psftoinhg = 0.014138;
const double FGJSBBase::psftopa = 47.88;
const double FGJSBBase::ktstofps = 1.68781;
const double FGJSBBase::fpstokts = 1.0/ktstofps;
const double FGJSBBase::inchtoft = 0.08333333;
const double FGJSBBase::inchtoft = 1.0/12;
const double FGJSBBase::in3tom3 = 1.638706E-5;
const double FGJSBBase::m3toft3 = 1.0/(fttom*fttom*fttom);
const double FGJSBBase::inhgtopa = 3386.38;
const double FGJSBBase::fttom = 0.3048;
double FGJSBBase::Reng = 1716.56; // Gas constant for Air (ft-lb/slug-R)
double FGJSBBase::Rstar = 1545.348; // Universal gas constant
double FGJSBBase::Mair = 28.9645; //
const double FGJSBBase::SHRatio = 1.40;
// Note that definition of lbtoslug by the inverse of slugtolb and not
// to a different constant you can also get from some tables will make
@ -108,7 +104,7 @@ const double FGJSBBase::kgtolb = 2.20462;
const double FGJSBBase::kgtoslug = 0.06852168;
const string FGJSBBase::needed_cfg_version = "2.0";
const string FGJSBBase::JSBSim_version = "1.0 " __DATE__ " " __TIME__ ;
const string FGJSBBase::JSBSim_version = JSBSIM_VERSION " " __DATE__ " " __TIME__ ;
queue <FGJSBBase::Message> FGJSBBase::Messages;
FGJSBBase::Message FGJSBBase::localMsg;

4
src/FDM/JSBSim/FGJSBBase.h
View file

@ -358,10 +358,6 @@ protected:
static const double m3toft3;
static const double inhgtopa;
static const double fttom;
static double Reng; // Specific Gas Constant,ft^2/(sec^2*R)
static double Rstar;
static double Mair;
static const double SHRatio;
static const double lbtoslug;
static const double slugtolb;
static const double kgtolb;

12
src/FDM/JSBSim/initialization/FGInitialCondition.cpp
View file

@ -185,9 +185,8 @@ void FGInitialCondition::SetVcalibratedKtsIC(double vcas)
double rhoSL = Atmosphere->GetDensitySL();
double mach = MachFromVcalibrated(fabs(vcas)*ktstofps, pressure, pressureSL, rhoSL);
double soundSpeed = Atmosphere->GetSoundSpeed(altitudeASL);
double PitotAngle = Aircraft->GetPitotAngle();
SetVtrueFpsIC(mach * soundSpeed / (cos(alpha+PitotAngle) * cos(beta)));
SetVtrueFpsIC(mach * soundSpeed);
lastSpeedSet = setvc;
}
@ -703,7 +702,6 @@ void FGInitialCondition::SetAltitudeASLFtIC(double alt)
double mach0 = vt / soundSpeed;
double vc0 = VcalibratedFromMach(mach0, pressure, pressureSL, rhoSL);
double ve0 = vt * sqrt(rho/rhoSL);
double PitotAngle = Aircraft->GetPitotAngle();
double geodLatitude = position.GetGeodLatitudeRad();
altitudeASL=alt;
@ -720,9 +718,8 @@ void FGInitialCondition::SetAltitudeASLFtIC(double alt)
switch(lastSpeedSet) {
case setvc:
mach0 = MachFromVcalibrated(vc0 * cos(alpha+PitotAngle) * cos(beta),
pressure, pressureSL, rhoSL);
SetVtrueFpsIC(mach0 * soundSpeed / (cos(alpha+PitotAngle) * cos(beta)));
mach0 = MachFromVcalibrated(vc0, pressure, pressureSL, rhoSL);
SetVtrueFpsIC(mach0 * soundSpeed);
break;
case setmach:
SetVtrueFpsIC(mach0 * soundSpeed);
@ -843,8 +840,7 @@ double FGInitialCondition::GetVcalibratedKtsIC(void) const
double pressureSL = Atmosphere->GetPressureSL();
double rhoSL = Atmosphere->GetDensitySL();
double soundSpeed = Atmosphere->GetSoundSpeed(altitudeASL);
double PitotAngle = Aircraft->GetPitotAngle();
double mach = vt * cos(alpha+PitotAngle) * cos(beta) / soundSpeed;
double mach = vt / soundSpeed;
return fpstokts * VcalibratedFromMach(mach, pressure, pressureSL, rhoSL);
}

5
src/FDM/JSBSim/input_output/FGInputSocket.cpp
View file

@ -61,7 +61,8 @@ CLASS IMPLEMENTATION
FGInputSocket::FGInputSocket(FGFDMExec* fdmex) :
FGInputType(fdmex),
socket(0)
socket(0),
SockProtocol(FGfdmSocket::ptTCP)
{
}
@ -95,7 +96,7 @@ bool FGInputSocket::InitModel(void)
{
if (FGInputType::InitModel()) {
delete socket;
socket = new FGfdmSocket(SockPort);
socket = new FGfdmSocket(SockPort, SockProtocol);
if (socket == 0) return false;
if (!socket->GetConnectStatus()) return false;

1
src/FDM/JSBSim/input_output/FGInputSocket.h
View file

@ -92,6 +92,7 @@ protected:
unsigned int SockPort;
FGfdmSocket* socket;
FGfdmSocket::ProtocolType SockProtocol;
std::string data;
};
}

2
src/FDM/JSBSim/input_output/FGInputType.cpp
View file

@ -81,7 +81,7 @@ void FGInputType::SetIdx(unsigned int idx)
bool FGInputType::Load(Element* element)
{
// Perform base class Load.
if(!FGModel::Load(element))
if(!FGModel::Load(element, true))
return false;
// no common attributes yet (see FGOutputType for example

4
src/FDM/JSBSim/input_output/FGModelLoader.cpp
View file

@ -46,7 +46,7 @@ using namespace std;
namespace JSBSim {
IDENT(IdSrc, "$Id: FGModelLoader.cpp,v 1.4 2017/02/25 14:23:18 bcoconni Exp $");
IDENT(IdSrc, "$Id: FGModelLoader.cpp,v 1.5 2017/03/18 16:17:42 bcoconni Exp $");
IDENT(IdHdr, ID_MODELLOADER);
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@ -71,7 +71,7 @@ Element_ptr FGModelLoader::Open(Element *el)
document = XMLFileRead.LoadXMLDocument(path);
if (document == 0L) {
cerr << endl << el->ReadFrom()
<< "Could not open file: " << path << endl;
<< "Could not open file: " << fname << endl;
return NULL;
}
CachedFiles[path.utf8Str()] = document;

17
src/FDM/JSBSim/input_output/FGOutputSocket.cpp
View file

@ -55,6 +55,7 @@ INCLUDES
#include "models/FGFCS.h"
#include "models/atmosphere/FGWinds.h"
#include "input_output/FGXMLElement.h"
#include "math/FGPropertyValue.h"
using namespace std;
@ -260,13 +261,11 @@ void FGOutputSocket::PrintHeaders(void)
if (SubSystems & ssPropulsion && Propulsion->GetNumEngines() > 0)
socket->Append(Propulsion->GetPropulsionStrings(","));
if (OutputProperties.size() > 0) {
for (unsigned int i=0;i<OutputProperties.size();i++)
if (OutputCaptions[i].size() > 0) {
socket->Append(OutputCaptions[i]);
} else {
socket->Append(OutputProperties[i]->GetPrintableName());
}
for (unsigned int i=0;i<OutputParameters.size();++i) {
if (!OutputCaptions[i].empty())
socket->Append(OutputCaptions[i]);
else
socket->Append(OutputParameters[i]->GetPrintableName());
}
socket->Send();
@ -378,8 +377,8 @@ void FGOutputSocket::Print(void)
socket->Append(Propulsion->GetPropulsionValues(","));
}
for (unsigned int i=0;i<OutputProperties.size();i++) {
socket->Append(OutputProperties[i]->getDoubleValue());
for (unsigned int i=0;i<OutputParameters.size();++i) {
socket->Append(OutputParameters[i]->GetValue());
}
socket->Send();

21
src/FDM/JSBSim/input_output/FGOutputTextFile.cpp
View file

@ -59,6 +59,7 @@ INCLUDES
#include "models/FGFCS.h"
#include "models/atmosphere/FGWinds.h"
#include "input_output/FGXMLElement.h"
#include "math/FGPropertyValue.h"
using namespace std;
@ -76,8 +77,6 @@ bool FGOutputTextFile::Load(Element* el)
if(!FGOutputFile::Load(el))
return false;
// PreLoad(el, PropertyManager);
string type = el->GetAttributeValue("type");
string delim;
if (type == "TABULAR") {
@ -234,14 +233,12 @@ bool FGOutputTextFile::OpenFile(void)
outstream << delimeter;
outstream << Propulsion->GetPropulsionStrings(delimeter);
}
if (OutputProperties.size() > 0) {
for (unsigned int i=0;i<OutputProperties.size();i++) {
if (OutputCaptions[i].size() > 0) {
outstream << delimeter << OutputCaptions[i];
} else {
outstream << delimeter << OutputProperties[i]->GetFullyQualifiedName();
}
}
for (unsigned int i=0;i<OutputParameters.size();++i) {
if (!OutputCaptions[i].empty())
outstream << delimeter << OutputCaptions[i];
else
outstream << delimeter << OutputParameters[i]->GetFullyQualifiedName();
}
if (PreFunctions.size() > 0) {
@ -394,8 +391,8 @@ void FGOutputTextFile::Print(void)
}
outstream.precision(18);
for (unsigned int i=0;i<OutputProperties.size();i++) {
outstream << delimeter << OutputProperties[i]->getDoubleValue();
for (unsigned int i=0;i<OutputParameters.size();++i) {
outstream << delimeter << OutputParameters[i]->GetValue();
}
for (unsigned int i=0;i<PreFunctions.size();i++) {
outstream << delimeter << PreFunctions[i]->getDoubleValue();

55
src/FDM/JSBSim/input_output/FGOutputType.cpp
View file

@ -43,6 +43,8 @@ INCLUDES
#include "FGOutputType.h"
#include "input_output/FGXMLElement.h"
#include "input_output/FGPropertyManager.h"
#include "math/FGTemplateFunc.h"
#include "math/FGFunctionValue.h"
namespace JSBSim {
@ -81,7 +83,10 @@ FGOutputType::FGOutputType(FGFDMExec* fdmex) :
FGOutputType::~FGOutputType()
{
OutputProperties.clear();
vector<FGPropertyValue*>::iterator it;
for (it=OutputParameters.begin(); it != OutputParameters.end(); ++it)
delete *it;
Debug(1);
}
@ -133,25 +138,41 @@ bool FGOutputType::Load(Element* element)
string property_str = property_element->GetDataLine();
FGPropertyNode* node = PropertyManager->GetNode(property_str);
if (!node) {
cerr << fgred << highint << endl << " No property by the name "
cerr << property_element->ReadFrom()
<< fgred << highint << endl << " No property by the name "
<< property_str << " has been defined. This property will " << endl
<< " not be logged. You should check your configuration file."
<< reset << endl;
} else {
OutputProperties.push_back(node);
if (property_element->HasAttribute("caption")) {
OutputCaptions.push_back(property_element->GetAttributeValue("caption"));
} else {
OutputCaptions.push_back("");
if (property_element->HasAttribute("apply")) {
string function_str = property_element->GetAttributeValue("apply");
FGOutput* Output = FDMExec->GetOutput();
FGTemplateFunc* f = Output->GetTemplateFunc(function_str);
if (f)
OutputParameters.push_back(new FGFunctionValue(node, f));
else {
cerr << property_element->ReadFrom()
<< fgred << highint << " No function by the name "
<< function_str << " has been defined. This property will "
<< "not be logged. You should check your configuration file."
<< reset << endl;
}
}
else
OutputParameters.push_back(new FGPropertyValue(node));
if (property_element->HasAttribute("caption"))
OutputCaptions.push_back(property_element->GetAttributeValue("caption"));
else
OutputCaptions.push_back("");
}
property_element = element->FindNextElement("property");
}
double outRate = 1.0;
if (!element->GetAttributeValue("rate").empty()) {
if (element->HasAttribute("rate"))
outRate = element->GetAttributeValueAsNumber("rate");
}
SetRateHz(outRate);
return true;
@ -204,6 +225,16 @@ double FGOutputType::GetRateHz(void) const
return 1.0 / (rate * FDMExec->GetDeltaT());
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
void FGOutputType::SetOutputProperties(vector<FGPropertyNode_ptr> & outputProperties)
{
vector<FGPropertyNode_ptr>::iterator it;
for (it = outputProperties.begin(); it != outputProperties.end(); ++it)
OutputParameters.push_back(new FGPropertyValue(*it));
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
// The bitmasked value choices are as follows:
// unset: In this case (the default) JSBSim would only print
@ -245,9 +276,9 @@ void FGOutputType::Debug(int from)
if (SubSystems & ssGroundReactions) cout << " Ground parameters logged" << endl;
if (SubSystems & ssFCS) cout << " FCS parameters logged" << endl;
if (SubSystems & ssPropulsion) cout << " Propulsion parameters logged" << endl;
if (OutputProperties.size() > 0) cout << " Properties logged:" << endl;
for (unsigned int i=0;i<OutputProperties.size();i++) {
cout << " - " << OutputProperties[i]->GetName() << endl;
if (!OutputParameters.empty()) cout << " Properties logged:" << endl;
for (unsigned int i=0;i<OutputParameters.size();i++) {
cout << " - " << OutputParameters[i]->GetName() << endl;
}
}
}

8
src/FDM/JSBSim/input_output/FGOutputType.h
View file

@ -67,6 +67,7 @@ class FGFCS;
class FGGroundReactions;
class FGExternalReactions;
class FGBuoyantForces;
class FGPropertyValue;
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS DOCUMENTATION
@ -124,10 +125,7 @@ public:
/** Set the list of properties that should be output for this output instance.
@param outputProperties list of properties that should be output
*/
void SetOutputProperties(std::vector<FGPropertyNode_ptr> & outputProperties)
{
OutputProperties = outputProperties;
}
void SetOutputProperties(std::vector<FGPropertyNode_ptr> & outputProperties);
/** Overwrites the name identifier under which the output will be logged.
This method is taken into account if it is called before
@ -199,7 +197,7 @@ public:
protected:
unsigned int OutputIdx;
int SubSystems;
std::vector <FGPropertyNode_ptr> OutputProperties;
std::vector <FGPropertyValue*> OutputParameters;
std::vector <std::string> OutputCaptions;
bool enabled;

53
src/FDM/JSBSim/input_output/FGScript.cpp
View file

@ -53,6 +53,7 @@ INCLUDES
#include "models/FGInput.h"
#include "math/FGCondition.h"
#include "math/FGFunction.h"
#include "math/FGFunctionValue.h"
using namespace std;
@ -88,6 +89,8 @@ FGScript::~FGScript()
delete Events[i].Condition;
for (j=0; j<Events[i].Functions.size(); j++)
delete Events[i].Functions[j];
for (j=0; j<Events[i].NotifyProperties.size(); j++)
delete Events[i].NotifyProperties[j];
}
Events.clear();
@ -206,8 +209,12 @@ bool FGScript::LoadScript(const SGPath& script, double default_dT,
// Now, read output spec if given.
element = document->FindElement("output");
SGPath scriptDir = SGPath(script.dir());
if (scriptDir.isNull())
scriptDir = SGPath(".");
while (element) {
if (!FDMExec->GetOutput()->Load(element))
if (!FDMExec->GetOutput()->Load(element, scriptDir))
return false;
element = document->FindNextElement("output");
@ -282,14 +289,29 @@ bool FGScript::LoadScript(const SGPath& script, double default_dT,
while (notify_property_element) {
notifyPropertyName = notify_property_element->GetDataLine();
newEvent->NotifyPropertyNames.push_back(notifyPropertyName);
newEvent->NotifyProperties.push_back(0);
string caption_attribute = notify_property_element->GetAttributeValue("caption");
if (caption_attribute.empty()) {
newEvent->DisplayString.push_back(notifyPropertyName);
} else {
newEvent->DisplayString.push_back(caption_attribute);
if (notify_property_element->HasAttribute("apply")) {
string function_str = notify_property_element->GetAttributeValue("apply");
FGOutput* Output = FDMExec->GetOutput();
FGTemplateFunc* f = Output->GetTemplateFunc(function_str);
if (f)
newEvent->NotifyProperties.push_back(new FGFunctionValue(notifyPropertyName, PropertyManager, f));
else {
cerr << notify_property_element->ReadFrom()
<< fgred << highint << " No function by the name "
<< function_str << " has been defined. This property will "
<< "not be logged. You should check your configuration file."
<< reset << endl;
}
}
else
newEvent->NotifyProperties.push_back(new FGPropertyValue(notifyPropertyName, PropertyManager));
string caption_attribute = notify_property_element->GetAttributeValue("caption");
if (caption_attribute.empty()) {
newEvent->DisplayString.push_back(notifyPropertyName);
} else {
newEvent->DisplayString.push_back(caption_attribute);
}
notify_property_element = notify_element->FindNextElement("property");
}
@ -487,13 +509,6 @@ bool FGScript::RunScript(void)
cout << " " << thisEvent.Description << endl;
}
for (j=0; j<thisEvent.NotifyProperties.size();j++) {
if (thisEvent.NotifyProperties[j] == 0) {
if (PropertyManager->HasNode(thisEvent.NotifyPropertyNames[j])) {
thisEvent.NotifyProperties[j] = PropertyManager->GetNode(thisEvent.NotifyPropertyNames[j]);
} else {
throw("Could not find property named "+thisEvent.NotifyPropertyNames[j]+" in script.");
}
}
cout << " " << thisEvent.DisplayString[j] << " = " << thisEvent.NotifyProperties[j]->getDoubleValue();
if (thisEvent.NotifyKML) cout << " <br/>";
cout << endl;
@ -657,10 +672,10 @@ void FGScript::Debug(int from)
} else {
cout << " Notifications:" << endl << " {" << endl;
}
for (unsigned j=0; j<Events[i].NotifyPropertyNames.size();j++) {
cout << " "
<< Events[i].NotifyPropertyNames[j]
<< endl;
for (unsigned j=0; j<Events[i].NotifyProperties.size();j++) {
cout << " "
<< Events[i].NotifyProperties[j]->GetPrintableName()
<< endl;
}
cout << " }" << endl;
}

4
src/FDM/JSBSim/input_output/FGScript.h
View file

@ -60,6 +60,7 @@ namespace JSBSim {
class FGFDMExec;
class FGCondition;
class FGFunction;
class FGPropertyValue;
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS DOCUMENTATION
@ -227,8 +228,7 @@ private:
std::string Description;
std::vector <FGPropertyNode_ptr> SetParam;
std::vector <std::string> SetParamName;
std::vector <FGPropertyNode_ptr> NotifyProperties;
std::vector <std::string> NotifyPropertyNames;
std::vector <FGPropertyValue*> NotifyProperties;
std::vector <std::string> DisplayString;
std::vector <eAction> Action;
std::vector <eType> Type;

40
src/FDM/JSBSim/input_output/FGUDPInputSocket.cpp
View file

@ -57,36 +57,21 @@ CLASS IMPLEMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
FGUDPInputSocket::FGUDPInputSocket(FGFDMExec* fdmex) :
FGInputType(fdmex),
socket(0)
FGInputSocket(fdmex), rate(20), oldTimeStamp(0.0)
{
rate = 20;
SockPort = 5139;
oldTimeStamp = 0.0;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FGUDPInputSocket::~FGUDPInputSocket()
{
delete socket;
SockProtocol = FGfdmSocket::ptUDP;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
bool FGUDPInputSocket::Load(Element* el)
{
if (!FGInputType::Load(el))
if (!FGInputSocket::Load(el))
return false;
rate = atoi(el->GetAttributeValue("rate").c_str());
SetRate(0.5 + 1.0/(FDMExec->GetDeltaT()*rate));
SockPort = atoi(el->GetAttributeValue("port").c_str());
if (SockPort == 0) {
cerr << endl << "No port assigned in input element" << endl;
return false;
}
Element *property_element = el->FindElement("property");
@ -107,25 +92,8 @@ bool FGUDPInputSocket::Load(Element* el)
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
bool FGUDPInputSocket::InitModel(void)
{
if (FGInputType::InitModel()) {
delete socket;
socket = new FGfdmSocket(SockPort, FGfdmSocket::ptUDP, FGfdmSocket::dIN);
if (socket == 0) return false;
cout << "UDP input socket established on port " << SockPort << endl;
return true;
}
return false;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
void FGUDPInputSocket::Read(bool Holding)
{
if (socket == 0) return;
data = socket->Receive();
@ -160,9 +128,7 @@ void FGUDPInputSocket::Read(bool Holding)
for (unsigned int i=1; i<values.size(); i++) {
InputProperties[i-1]->setDoubleValue(values[i]);
}
}
}
}

17
src/FDM/JSBSim/input_output/FGUDPInputSocket.h
View file

@ -38,8 +38,7 @@ SENTRY
INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#include "FGInputType.h"
#include "input_output/FGfdmSocket.h"
#include "FGInputSocket.h"
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
DEFINITIONS
@ -64,26 +63,17 @@ CLASS DOCUMENTATION
CLASS DECLARATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
class FGUDPInputSocket : public FGInputType
class FGUDPInputSocket : public FGInputSocket
{
public:
/** Constructor. */
FGUDPInputSocket(FGFDMExec* fdmex);
/** Destructor. */
~FGUDPInputSocket();
/** Reads the property names from an XML file.
@param element The root XML Element of the input file.
*/
bool Load(Element* el);
/** Initializes the instance. This method basically opens the socket to which
inputs will be directed.
@result true if the execution succeeded.
*/
bool InitModel(void);
/// Reads the socket and updates properties accordingly.
void Read(bool Holding);
@ -92,9 +82,6 @@ protected:
int rate;
double oldTimeStamp;
std::vector<FGPropertyNode_ptr> InputProperties;
unsigned int SockPort;
FGfdmSocket* socket;
std::string data;
};
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

146
src/FDM/JSBSim/input_output/FGUDPOutputSocket.cpp
View file

@ -1,146 +0,0 @@
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Module: FGUDPOutputSocket.cpp
Author: David Culp
Date started: 03/31/15
Purpose: Manage output of property values to a UDP socket
Called by: FGOutput
------------- Copyright (C) 2015 David Culp ----------------
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
details.
You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA.
Further information about the GNU Lesser General Public License can also be found on
the world wide web at http://www.gnu.org.
FUNCTIONAL DESCRIPTION
--------------------------------------------------------------------------------
This class sends comma-separated strings over a UDP socket. The format is that required
by the QtJSBSim application.
HISTORY
--------------------------------------------------------------------------------
03/31/15 DC Created
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#include <cstring>
#include <cstdlib>
#include "FGUDPOutputSocket.h"
#include "FGFDMExec.h"
#include "input_output/FGPropertyManager.h"
#include "input_output/FGXMLElement.h"
using namespace std;
namespace JSBSim {
IDENT(IdSrc,"$Id: FGUDPOutputSocket.cpp,v 1.2 2015/08/16 13:19:52 bcoconni Exp $");
IDENT(IdHdr,ID_UDPOUTPUTSOCKET);
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS IMPLEMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
FGUDPOutputSocket::FGUDPOutputSocket(FGFDMExec* fdmex) :
FGOutputType(fdmex),
socket(0)
{
FDMExec = fdmex;
PropertyManager = fdmex->GetPropertyManager();
root = PropertyManager->GetNode();
root->SetDouble("simulation/null", 0.0);
SockName = "localhost";
SockPort = 5138;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FGUDPOutputSocket::~FGUDPOutputSocket()
{
delete socket;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
bool FGUDPOutputSocket::Load(Element* el)
{
Element *property_element = el->FindElement("property");
while (property_element) {
string property_str = property_element->GetDataLine();
FGPropertyNode* node = PropertyManager->GetNode(property_str);
if (!node) {
node = PropertyManager->GetNode("simulation/null");
}
OutputProperties.push_back(node);
property_element = el->FindNextElement("property");
}
double outRate = 1.0;
if (!el->GetAttributeValue("rate").empty()) {
outRate = el->GetAttributeValueAsNumber("rate");
}
SetRateHz(outRate);
SockPort = atoi(el->GetAttributeValue("port").c_str());
if (SockPort == 0) {
cerr << endl << "No port assigned for output." << endl;
return false;
}
return true;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
bool FGUDPOutputSocket::InitModel(void)
{
if (FGOutputType::InitModel()) {
delete socket;
socket = new FGfdmSocket(SockName, SockPort, FGfdmSocket::ptUDP);
if (socket == 0) return false;
if (!socket->GetConnectStatus()) return false;
return true;
}
return false;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
void FGUDPOutputSocket::Print(void)
{
if (socket == 0) return;
if (!socket->GetConnectStatus()) return;
socket->Clear();
socket->Append(FDMExec->GetSimTime());
for (unsigned int i=0;i<OutputProperties.size();i++) {
socket->Append(OutputProperties[i]->getDoubleValue());
}
socket->Send();
}
}

106
src/FDM/JSBSim/input_output/FGUDPOutputSocket.h
View file

@ -1,106 +0,0 @@
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Header: FGOutputSocket.h
Author: David Culp
Date started: 03/31/15
------------- Copyright (C) 2015 David Culp ---------------
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
details.
You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA.
Further information about the GNU Lesser General Public License can also be found on
the world wide web at http://www.gnu.org.
HISTORY
--------------------------------------------------------------------------------
03/31/15 DC Created
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
SENTRY
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#ifndef FGUDPOUTPUTSOCKET_H
#define FGUDPOUTPUTSOCKET_H
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#include "FGOutputType.h"
#include "input_output/FGPropertyManager.h"
#include "input_output/FGfdmSocket.h"
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
DEFINITIONS
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#define ID_UDPOUTPUTSOCKET "$Id: FGUDPOutputSocket.h,v 1.1 2015/04/02 02:23:33 dpculp Exp $"
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FORWARD DECLARATIONS
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
namespace JSBSim {
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS DOCUMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
/** Implements the output to a UDP socket. This class outputs data to a socket
in a comma-separated strings format. The first string represents a time
stamp, and each string thereafter is the value of a property. If a
specified property does not exist, then a zero is sent, so that the
number of values sent will always equal the number of properties requested.
*/
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS DECLARATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
class FGUDPOutputSocket : public FGOutputType
{
public:
/** Constructor. */
FGUDPOutputSocket(FGFDMExec* fdmex);
/** Destructor. */
~FGUDPOutputSocket();
/** Init the output directives from an XML file.
@param element XML Element that is pointing to the output directives
*/
virtual bool Load(Element* el);
/** Initializes the instance. This method opens the ouput socket.
@result true if the execution succeeded.
*/
bool InitModel(void);
/// Generates and sends the output datagram.
void Print(void);
protected:
std::string SockName;
unsigned int SockPort;
FGfdmSocket* socket;
FGPropertyManager* PropertyManager;
FGPropertyNode* root;
FGFDMExec* FDMExec;
};
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
#endif

108
src/FDM/JSBSim/input_output/FGfdmSocket.cpp
View file

@ -131,46 +131,69 @@ FGfdmSocket::FGfdmSocket(const string& address, int port, int protocol)
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
// assumes UDP socket on localhost, for inbound datagrams
FGfdmSocket::FGfdmSocket(int port, int protocol, int direction) // assumes UDP
// assumes TCP or UDP socket on localhost, for inbound datagrams
FGfdmSocket::FGfdmSocket(int port, int protocol)
{
sckt = -1;
connected = false;
Protocol = (ProtocolType)protocol;
Direction = (DirectionType) direction;
string ProtocolName;
#if defined(_MSC_VER) || defined(__MINGW32__)
if (!LoadWinSockDLL()) return;
#endif
if (Protocol == ptUDP) { //use udp protocol
ProtocolName = "UDP";
sckt = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
#if defined(_MSC_VER) || defined(__MINGW32__)
u_long NonBlock = 1; // True
ioctlsocket(sckt, FIONBIO, &NonBlock);
u_long NonBlock = 1; // True
ioctlsocket(sckt, FIONBIO, &NonBlock);
#else
fcntl(sckt, F_SETFL, O_NONBLOCK);
fcntl(sckt, F_SETFL, O_NONBLOCK);
#endif
cout << "Creating UDP input socket on port " << port << endl;
}
else {
ProtocolName = "TCP";
sckt = socket(AF_INET, SOCK_STREAM, 0);
}
cout << "Creating input " << ProtocolName << " socket on port " << port << endl;
if (sckt != -1) {
memset(&scktName, 0, sizeof(struct sockaddr_in));
scktName.sin_family = AF_INET;
scktName.sin_port = htons(port);
if (sckt != -1) {
memset(&scktName, 0, sizeof(struct sockaddr_in));
scktName.sin_family = AF_INET;
scktName.sin_port = htons(port);
if (Protocol == ptUDP)
scktName.sin_addr.s_addr = htonl(INADDR_ANY);
int len = sizeof(struct sockaddr_in);
if (bind(sckt, (struct sockaddr*)&scktName, len) != -1) {
cout << "Successfully bound to UDP input socket on port " << port << endl <<endl;
int len = sizeof(struct sockaddr_in);
if (bind(sckt, (struct sockaddr*)&scktName, len) != -1) {
cout << "Successfully bound to " << ProtocolName << " input socket on port "
<< port << endl <<endl;
if (Protocol == ptTCP) {
unsigned long NoBlock = true;
if (listen(sckt, 5) >= 0) { // successful listen()
#if defined(_MSC_VER) || defined(__MINGW32__)
ioctlsocket(sckt, FIONBIO, &NoBlock);
sckt_in = accept(sckt, (struct sockaddr*)&scktName, &len);
#else
ioctl(sckt, FIONBIO, &NoBlock);
sckt_in = accept(sckt, (struct sockaddr*)&scktName, (socklen_t*)&len);
#endif
connected = true;
} else {
cerr << "Could not listen ..." << endl;
}
} else
connected = true;
} else { // unsuccessful
cout << "Could not bind to UDP input socket, error = " << errno << endl;
}
} else { // unsuccessful
cout << "Could not create socket for UDP input, error = " << errno << endl;
} else { // unsuccessful
cout << "Could not bind to " << ProtocolName << " input socket, error = "
<< errno << endl;
}
} else { // unsuccessful
cout << "Could not create " << ProtocolName << " socket for input, error = "
<< errno << endl;
}
Debug(0);
}
@ -225,49 +248,6 @@ FGfdmSocket::FGfdmSocket(const string& address, int port) // assumes TCP
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FGfdmSocket::FGfdmSocket(int port) // assumes TCP
{
connected = false;
unsigned long NoBlock = true;
Protocol = ptTCP;
#if defined(_MSC_VER) || defined(__MINGW32__)
if (!LoadWinSockDLL()) return;
#endif
sckt = socket(AF_INET, SOCK_STREAM, 0);
if (sckt >= 0) { // successful
memset(&scktName, 0, sizeof(struct sockaddr_in));
scktName.sin_family = AF_INET;
scktName.sin_port = htons(port);
int len = sizeof(struct sockaddr_in);
if (bind(sckt, (struct sockaddr*)&scktName, len) == 0) { // successful
cout << "Successfully bound to socket for input on port " << port << endl;
if (listen(sckt, 5) >= 0) { // successful listen()
#if defined(_MSC_VER) || defined(__MINGW32__)
ioctlsocket(sckt, FIONBIO, &NoBlock);
sckt_in = accept(sckt, (struct sockaddr*)&scktName, &len);
#else
ioctl(sckt, FIONBIO, &NoBlock);
sckt_in = accept(sckt, (struct sockaddr*)&scktName, (socklen_t*)&len);
#endif
} else {
cerr << "Could not listen ..." << endl;
}
connected = true;
} else { // unsuccessful
cerr << "Could not bind to socket for input ..." << endl;
}
} else { // unsuccessful
cerr << "Could not create socket for FDM input, error = " << errno << endl;
}
Debug(0);
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FGfdmSocket::~FGfdmSocket()
{
if (sckt) shutdown(sckt,2);

5
src/FDM/JSBSim/input_output/FGfdmSocket.h
View file

@ -91,8 +91,7 @@ class FGfdmSocket : public FGJSBBase
public:
FGfdmSocket(const std::string&, int);
FGfdmSocket(const std::string&, int, int);
FGfdmSocket(int, int, int);
FGfdmSocket(int);
FGfdmSocket(int, int);
~FGfdmSocket();
void Send(void);
void Send(const char *data, int length);
@ -109,12 +108,10 @@ public:
bool GetConnectStatus(void) {return connected;}
enum ProtocolType {ptUDP, ptTCP};
enum DirectionType {dIN, dOUT};
private:
int sckt;
int sckt_in;
DirectionType Direction;
ProtocolType Protocol;
struct sockaddr_in scktName;
struct hostent *host;

80
src/FDM/JSBSim/math/FGFunction.cpp
View file

@ -33,6 +33,7 @@ INCLUDES
#include <cstdlib>
#include <cmath>
#include "simgear/misc/strutils.hxx"
#include "FGFunction.h"
#include "FGTable.h"
#include "FGPropertyValue.h"
@ -50,6 +51,8 @@ IDENT(IdHdr,ID_FUNCTION);
CLASS IMPLEMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
const double FGFunction::invlog2val = 1.0/log10(2.0);
const std::string FGFunction::property_string = "property";
const std::string FGFunction::value_string = "value";
const std::string FGFunction::table_string = "table";
@ -108,21 +111,21 @@ const std::string FGFunction::ifthen_string = "ifthen";
const std::string FGFunction::switch_string = "switch";
const std::string FGFunction::interpolate1d_string = "interpolate1d";
FGFunction::FGFunction(FGPropertyManager* propMan, Element* el, const string& prefix)
: PropertyManager(propMan), Prefix(prefix)
FGFunction::FGFunction(FGPropertyManager* PropertyManager, Element* el,
const string& prefix, FGPropertyValue* var)
: Prefix(prefix), cached(false), cachedValue(-HUGE_VAL), pCopyTo(0L)
{
Element* element;
string operation, property_name;
cached = false;
cachedValue = -HUGE_VAL;
invlog2val = 1.0/log10(2.0);
pCopyTo = 0L;
Load(PropertyManager, el, var);
}
void FGFunction::Load(FGPropertyManager* PropertyManager, Element* el,
FGPropertyValue* var)
{
Name = el->GetAttributeValue("name");
operation = el->GetName();
string operation = el->GetName();
if (operation == function_string) {
sCopyTo = el->GetAttributeValue("copyto");
string sCopyTo = el->GetAttributeValue("copyto");
if (!sCopyTo.empty()) {
if (sCopyTo.find("#") != string::npos) {
@ -232,7 +235,7 @@ FGFunction::FGFunction(FGPropertyManager* propMan, Element* el, const string& pr
cerr << "Bad operation " << operation << " detected in configuration file" << endl;
}
element = el->GetElement();
Element* element = el->GetElement();
if (!element && Type != eRandom && Type != eUrandom && Type != ePi) {
cerr << fgred << highint << endl;
cerr << " No element was specified as an argument to the \"" << operation << "\" operation" << endl;
@ -248,26 +251,36 @@ FGFunction::FGFunction(FGPropertyManager* propMan, Element* el, const string& pr
// data types
if (operation == property_string || operation == p_string) {
property_name = element->GetDataLine();
if (property_name.find("#") != string::npos) {
if (is_number(Prefix)) {
property_name = replace(property_name,"#",Prefix);
string property_name = element->GetDataLine();
if (var && simgear::strutils::strip(property_name) == "#")
Parameters.push_back(var);
else {
if (property_name.find("#") != string::npos) {
if (is_number(Prefix)) {
property_name = replace(property_name,"#",Prefix);
}
else
cerr << el->ReadFrom()
<< fgred << "Illegal use of the special character '#'"
<< reset << endl;
}
if (PropertyManager->HasNode(property_name)) {
FGPropertyNode* newNode = PropertyManager->GetNode(property_name);
Parameters.push_back(new FGPropertyValue( newNode ));
} else {
// cerr << fgcyan << "Warning: The property " + property_name + " is initially undefined."
// << reset << endl;
Parameters.push_back(new FGPropertyValue( property_name,
PropertyManager ));
}
}
if (PropertyManager->HasNode(property_name)) {
FGPropertyNode* newNode = PropertyManager->GetNode(property_name);
Parameters.push_back(new FGPropertyValue( newNode ));
} else {
// cerr << fgcyan << "Warning: The property " + property_name + " is initially undefined."
// << reset << endl;
Parameters.push_back(new FGPropertyValue( property_name,
PropertyManager ));
}
} else if (operation == value_string || operation == v_string) {
Parameters.push_back(new FGRealValue(element->GetDataAsNumber()));
} else if (operation == table_string || operation == t_string) {
Parameters.push_back(new FGTable(PropertyManager, element, Prefix));
// operations
// operations
} else if (operation == product_string ||
operation == difference_string ||
operation == sum_string ||
@ -315,28 +328,21 @@ FGFunction::FGFunction(FGPropertyManager* propMan, Element* el, const string& pr
operation == ifthen_string ||
operation == switch_string ||
operation == interpolate1d_string)
{
Parameters.push_back(new FGFunction(PropertyManager, element, Prefix));
} else if (operation != description_string) {
{
Parameters.push_back(new FGFunction(PropertyManager, element, Prefix, var));
} else if (operation != description_string) {
cerr << "Bad operation " << operation << " detected in configuration file" << endl;
}
element = el->GetNextElement();
}
bind(el); // Allow any function to save its value
bind(el, PropertyManager); // Allow any function to save its value
Debug(0);
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FGFunction::~FGFunction(void)
{
for (unsigned int i=0; i<Parameters.size(); i++) delete Parameters[i];
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
void FGFunction::cacheValue(bool cache)
{
cached = false; // Must set cached to false prior to calling GetValue(), else
@ -784,7 +790,7 @@ string FGFunction::GetValueAsString(void) const
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
void FGFunction::bind(Element* el)
void FGFunction::bind(Element* el, FGPropertyManager* PropertyManager)
{
if ( !Name.empty() ) {
string tmp;

52
src/FDM/JSBSim/math/FGFunction.h
View file

@ -52,6 +52,7 @@ FORWARD DECLARATIONS
namespace JSBSim {
class Element;
class FGPropertyValue;
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS DOCUMENTATION
@ -696,28 +697,32 @@ DECLARATION: FGFunction
// Todo: Does this class need a copy constructor, like FGLGear?
class FGFunction : public FGParameter
class FGFunction : public FGParameter, public FGJSBBase
{
public:
/// Default constructor.
FGFunction()
: cached(false), cachedValue(-HUGE_VAL), pCopyTo(0L) {}
/** Constructor.
/** Constructor.
When this constructor is called, the XML element pointed to in memory by the
element argument is traversed. If other FGParameter-derived objects (values,
functions, properties, or tables) are encountered, this instance of the
FGFunction object will store a pointer to the found object and pass the relevant
Element pointer to the constructor for the new object. In other words, each
FGFunction object maintains a list of "child" FGParameter-derived objects which
in turn may each contain its own list, and so on. At runtime, each object
evaluates its child parameters, which each may have its own child parameters to
evaluate.
FGFunction object will store a pointer to the found object and pass the
relevant Element pointer to the constructor for the new object. In other
words, each FGFunction object maintains a list of "child"
FGParameter-derived objects which in turn may each contain its own list, and
so on. At runtime, each object evaluates its child parameters, which each
may have its own child parameters to evaluate.
@param PropertyManager a pointer to the property manager instance.
@param element a pointer to the Element object containing the function definition.
@param prefix an optional prefix to prepend to the name given to the property
that represents this function (if given).
@param element a pointer to the Element object containing the function
definition.
@param prefix an optional prefix to prepend to the name given to the
property that represents this function (if given).
*/
FGFunction(FGPropertyManager* PropertyManager, Element* element, const std::string& prefix="");
/// Destructor.
virtual ~FGFunction();
FGFunction(FGPropertyManager* PropertyManager, Element* element,
const std::string& prefix="", FGPropertyValue* var=0L);
/** Retrieves the value of the function object.
@return the total value of the function. */
@ -738,12 +743,13 @@ public:
@param shouldCache specifies whether the function should cache the computed value. */
void cacheValue(bool shouldCache);
protected:
void Load(FGPropertyManager* PropertyManager, Element* element,
FGPropertyValue* var);
virtual void bind(Element*, FGPropertyManager*);
private:
std::vector <FGParameter*> Parameters;
FGPropertyManager* const PropertyManager;
bool cached;
double invlog2val;
std::string Prefix;
static const double invlog2val;
static const std::string description_string;
static const std::string property_string;
static const std::string value_string;
@ -799,7 +805,7 @@ private:
static const std::string ifthen_string;
static const std::string switch_string;
static const std::string interpolate1d_string;
double cachedValue;
enum functionType {eTopLevel=0, eProduct, eDifference, eSum, eQuotient, ePow, eSqrt, eToRadians,
eToDegrees, eExp, eAbs, eSign, eSin, eCos, eTan, eASin, eACos, eATan, eATan2,
eMin, eMax, eAvg, eFrac, eInteger, eMod, eRandom, eUrandom, ePi,
@ -807,12 +813,14 @@ private:
eIfThen, eSwitch, eInterpolate1D, eRotation_alpha_local,
eRotation_beta_local, eRotation_gamma_local, eRotation_bf_to_wf,
eRotation_wf_to_bf} Type;
std::string Prefix;
bool cached;
double cachedValue;
std::string Name;
std::string sCopyTo; // Property name to copy function value to
std::vector <FGParameter_ptr> Parameters;
FGPropertyNode_ptr pCopyTo; // Property node for CopyTo property string
unsigned int GetBinary(double) const;
void bind(Element*);
void Debug(int from);
};

85
src/FDM/JSBSim/math/FGFunctionValue.h Normal file
View file

@ -0,0 +1,85 @@
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Header: FGFunctionValue.h
Author: Bertrand Coconnier
Date started: March 10 2018
--------- Copyright (C) 2018 B. Coconnier (bcoconni@users.sf.net) -----------
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option) any
later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Further information about the GNU Lesser General Public License can also be
found on the world wide web at http://www.gnu.org.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
SENTRY
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#ifndef FGFUNCTIONVALUE_H
#define FGFUNCTIONVALUE_H
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#include "math/FGPropertyValue.h"
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FORWARD DECLARATIONS
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
namespace JSBSim {
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS DOCUMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
/** Represents a property value on which a function is applied
@author Bertrand Coconnier
*/
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
DECLARATION: FGFunctionValue
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
class FGFunctionValue : public FGPropertyValue
{
public:
FGFunctionValue(FGPropertyNode* propNode, FGTemplateFunc* f)
:FGPropertyValue(propNode), function(f) {}
FGFunctionValue(std::string propName, FGPropertyManager* propertyManager,
FGTemplateFunc* f)
:FGPropertyValue(propName, propertyManager), function(f) {}
double GetValue(void) const { return function->GetValue(GetNode()); }
std::string GetName(void) const {
return function->GetName() + "(" + FGPropertyValue::GetName() + ")";
}
std::string GetPrintableName(void) const {
return function->GetName() + "(" + FGPropertyValue::GetPrintableName() + ")";
}
std::string GetFullyQualifiedName(void) const {
return function->GetName() + "(" + FGPropertyValue::GetFullyQualifiedName() + ")";
}
private:
FGTemplateFunc_ptr function;
};
} // namespace JSBSim
#endif

7
src/FDM/JSBSim/math/FGParameter.h
View file

@ -34,7 +34,8 @@ SENTRY
INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#include "FGJSBBase.h"
#include <string>
#include "simgear/structure/SGSharedPtr.hxx"
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
DEFINITIONS
@ -60,7 +61,7 @@ CLASS DOCUMENTATION
DECLARATION: FGParameter
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
class FGParameter : public FGJSBBase
class FGParameter : public SGReferenced
{
public:
virtual ~FGParameter(void) {};
@ -73,6 +74,8 @@ public:
protected:
};
typedef SGSharedPtr<FGParameter> FGParameter_ptr;
} // namespace JSBSim
#endif

37
src/FDM/JSBSim/math/FGPropertyValue.cpp
View file

@ -62,7 +62,7 @@ FGPropertyValue::FGPropertyValue(std::string propName, FGPropertyManager* proper
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
double FGPropertyValue::GetValue(void) const
FGPropertyNode* FGPropertyValue::GetNode(void) const
{
FGPropertyNode* node = PropertyNode;
@ -76,18 +76,45 @@ double FGPropertyValue::GetValue(void) const
}
}
return node->getDoubleValue()*Sign;
return node;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
double FGPropertyValue::GetValue(void) const
{
return GetNode()->getDoubleValue()*Sign;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
std::string FGPropertyValue::GetName(void) const
{
if (PropertyNode) {
if (PropertyNode)
return PropertyNode->GetName();
} else {
else
return PropertyName;
}
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
std::string FGPropertyValue::GetFullyQualifiedName(void) const
{
if (PropertyNode)
return PropertyNode->GetFullyQualifiedName();
else
return PropertyName;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
std::string FGPropertyValue::GetPrintableName(void) const
{
if (PropertyNode)
return PropertyNode->GetPrintableName();
else
return PropertyName;
}
}

10
src/FDM/JSBSim/math/FGPropertyValue.h
View file

@ -68,12 +68,16 @@ public:
FGPropertyValue(FGPropertyNode* propNode);
FGPropertyValue(std::string propName, FGPropertyManager* propertyManager);
~FGPropertyValue() {};
double GetValue(void) const;
virtual double GetValue(void) const;
void SetNode(FGPropertyNode* node) {PropertyNode = node;}
std::string GetName(void) const;
virtual std::string GetName(void) const;
virtual std::string GetFullyQualifiedName(void) const;
virtual std::string GetPrintableName(void) const;
protected:
FGPropertyNode* GetNode(void) const;
private:
FGPropertyManager* PropertyManager; // Property root used to do late binding.

2
src/FDM/JSBSim/math/FGRealValue.cpp
View file

@ -29,7 +29,7 @@ INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#include "FGRealValue.h"
#include "FGJSBBase.h"
#include "input_output/string_utilities.h"
using namespace std;

2
src/FDM/JSBSim/math/FGTable.h
View file

@ -240,7 +240,7 @@ combustion_efficiency = Lookup_Combustion_Efficiency->GetValue(equivalence_ratio
CLASS DECLARATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
class FGTable : public FGParameter
class FGTable : public FGParameter, public FGJSBBase
{
public:
/// Destructor

86
src/FDM/JSBSim/math/FGTemplateFunc.h Normal file
View file

@ -0,0 +1,86 @@
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Header: FGTemplateFunc.h
Author: Bertrand Coconnier
Date started: March 10 2018
--------- Copyright (C) 2018 B. Coconnier (bcoconni@users.sf.net) -----------
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option) any
later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Further information about the GNU Lesser General Public License can also be
found on the world wide web at http://www.gnu.org.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
SENTRY
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#ifndef FGTEMPLATEFUNC_H
#define FGTEMPLATEFUNC_H
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#include "math/FGFunction.h"
#include "math/FGPropertyValue.h"
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FORWARD DECLARATIONS
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
namespace JSBSim {
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS DOCUMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
DECLARATION: FGTemplateFunc
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
class FGTemplateFunc : public FGFunction
{
public:
FGTemplateFunc(FGPropertyManager* PropertyManager, Element* element)
: var(0L)
{
Load(PropertyManager, element, &var);
// Since 'var' is a member of FGTemplateFunc, we don't want SGSharedPtr to
// destroy 'var' when it would no longer be referenced by any shared
// pointers. In order to avoid this, the reference counter is increased an
// extra time to make sure that it never reaches 0 when all shared pointers
// referencing 'var' are destroyed.
get(&var);
}
double GetValue(FGPropertyNode* node) {
var.SetNode(node);
return FGFunction::GetValue();
}
private:
/** FGTemplateFunc must not be bound to the property manager. The bind method
is therefore overloaded as a no-op */
virtual void bind(Element*, FGPropertyManager*) {}
FGPropertyValue var;
};
typedef SGSharedPtr<FGTemplateFunc> FGTemplateFunc_ptr;
} // namespace JSBSim
#endif

353
src/FDM/JSBSim/models/FGAerodynamics.cpp
View file

@ -76,7 +76,8 @@ FGAerodynamics::FGAerodynamics(FGFDMExec* FDMExec) : FGModel(FDMExec)
AxisIdx["Y"] = 1;
AxisIdx["Z"] = 2;
axisType = atNone;
forceAxisType = atNone;
momentAxisType = atNone;
AeroFunctions = new AeroFunctionArray[6];
AeroFunctionsAtCG = new AeroFunctionArray[6];
@ -154,7 +155,7 @@ bool FGAerodynamics::Run(bool Holding)
// Skip the computation if qbar is close to zero to avoid huge values for
// aero/cl-squared when a non-null lift coincides with a very small aero
// velocity (i.e. when qbar is close to zero).
clsq = (vFw(eLift) + vFwAtCG(eLift))/ (in.Wingarea*in.Qbar);
clsq = vFw(eLift) / (in.Wingarea*in.Qbar);
clsq *= clsq;
}
@ -179,17 +180,18 @@ bool FGAerodynamics::Run(bool Holding)
if (alphahystmax != 0.0 && alphahystmin != 0.0) {
if (in.Alpha > alphahystmax) {
stall_hyst = 1;
stall_hyst = 1;
} else if (in.Alpha < alphahystmin) {
stall_hyst = 0;
stall_hyst = 0;
}
}
vFw.InitMatrix();
vFwAtCG.InitMatrix();
vFnative.InitMatrix();
vFnativeAtCG.InitMatrix();
BuildStabilityTransformMatrices();
for (axis_ctr = 0; axis_ctr < 3; ++axis_ctr) {
AeroFunctionArray::iterator f;
@ -210,68 +212,46 @@ bool FGAerodynamics::Run(bool Holding)
}
}
// Note that we still need to convert to wind axes here, because it is
// used in the L/D calculation, and we still may want to look at Lift
// and Drag.
switch (forceAxisType) {
case atBodyXYZ: // Forces already in body axes; no manipulation needed
vForces = vFnative;
vForcesAtCG = vFnativeAtCG;
break;
case atWind: // Copy forces into wind axes
vFnative(eDrag)*=-1; vFnative(eLift)*=-1;
vForces = in.Tw2b*vFnative;
// JSB 4/27/12 - After use, convert wind axes to produce normal lift
// and drag values - not negative ones!
vFnativeAtCG(eDrag)*=-1; vFnativeAtCG(eLift)*=-1;
vForcesAtCG = in.Tw2b*vFnativeAtCG;
break;
case atBodyAxialNormal: // Convert native forces into Axial|Normal|Side system
vFnative(eX)*=-1; vFnative(eZ)*=-1;
vForces = vFnative;
// As a clarification, JSBSim assumes that drag and lift values are defined
// in wind axes - BUT with a 180 rotation about the Y axis. That is, lift and
// drag will be positive up and aft, respectively, so that they are reported
// as positive numbers. However, the wind axes themselves assume that the X
// and Z forces are positive forward and down.
vFnativeAtCG(eX)*=-1; vFnativeAtCG(eZ)*=-1;
vForcesAtCG = vFnativeAtCG;
break;
case atStability: // Convert from stability axes to both body and wind axes
vFnative(eDrag) *= -1; vFnative(eLift) *= -1;
vForces = Ts2b*vFnative;
switch (axisType) {
case atBodyXYZ: // Forces already in body axes; no manipulation needed
vFw = in.Tb2w*vFnative;
vForces = vFnative;
vFw(eDrag)*=-1; vFw(eLift)*=-1;
vFwAtCG = in.Tb2w*vFnativeAtCG;
vForcesAtCG = vFnativeAtCG;
vFwAtCG(eDrag)*=-1; vFwAtCG(eLift)*=-1;
break;
case atLiftDrag: // Copy forces into wind axes
vFw = vFnative;
vFw(eDrag)*=-1; vFw(eLift)*=-1;
vForces = in.Tw2b*vFw;
vFw(eDrag)*=-1; vFw(eLift)*=-1;
vFwAtCG = vFnativeAtCG;
vFwAtCG(eDrag)*=-1; vFwAtCG(eLift)*=-1;
vForcesAtCG = in.Tw2b*vFwAtCG;
vFwAtCG(eDrag)*=-1; vFwAtCG(eLift)*=-1;
break;
case atAxialNormal: // Convert native forces into Axial|Normal|Side system
vFw = in.Tb2w*vFnative;
vFnative(eX)*=-1; vFnative(eZ)*=-1;
vForces = vFnative;
vFwAtCG = in.Tb2w*vFnativeAtCG;
vFnativeAtCG(eX)*=-1; vFnativeAtCG(eZ)*=-1;
vForcesAtCG = vFnativeAtCG;
break;
default:
cerr << endl << " A proper axis type has NOT been selected. Check "
<< "your aerodynamics definition." << endl;
exit(-1);
vFnativeAtCG(eDrag) *= -1; vFnativeAtCG(eLift) *= -1;
vForcesAtCG = Ts2b*vFnativeAtCG;
break;
default:
cerr << endl << " A proper axis type has NOT been selected. Check "
<< "your aerodynamics definition." << endl;
exit(-1);
}
// Calculate lift Lift over Drag
if ( fabs(vFw(eDrag) + vFwAtCG(eDrag)) > 0.0)
lod = fabs( (vFw(eLift) + vFwAtCG(eLift))/ (vFw(eDrag) + vFwAtCG(eDrag)));
// Calculate aerodynamic reference point shift, if any. The shift
// takes place in the structual axis. That is, if the shift is positive,
// it is towards the back (tail) of the vehicle. The AeroRPShift
// function should be non-dimensionalized by the wing chord. The
// calculated vDeltaRP will be in feet.
// Calculate aerodynamic reference point shift, if any. The shift takes place
// in the structual axis. That is, if the shift is positive, it is towards the
// back (tail) of the vehicle. The AeroRPShift function should be
// non-dimensionalized by the wing chord. The calculated vDeltaRP will be in
// feet.
if (AeroRPShift) vDeltaRP(eX) = AeroRPShift->GetValue()*in.Wingchord;
vDXYZcg(eX) = in.RPBody(eX) - vDeltaRP(eX); // vDeltaRP is given in the structural frame
vDXYZcg(eY) = in.RPBody(eY) + vDeltaRP(eY);
vDXYZcg(eX) = in.RPBody(eX) - vDeltaRP(eX); // vDeltaRP is given in the
vDXYZcg(eY) = in.RPBody(eY) + vDeltaRP(eY); // structural frame.
vDXYZcg(eZ) = in.RPBody(eZ) - vDeltaRP(eZ);
vMomentsMRC.InitMatrix();
@ -287,11 +267,50 @@ bool FGAerodynamics::Run(bool Holding)
vMomentsMRC(axis_ctr+1) += (*f)->GetValue();
}
}
vMoments = vMomentsMRC + vDXYZcg*vForces; // M = r X F
// Now add the "at CG" values to base forces - after the moments have been transferred
// Transform moments to bodyXYZ if the moments are specified in stability or
// wind axes
vMomentsMRCBodyXYZ.InitMatrix();
switch (momentAxisType) {
case atBodyXYZ:
vMomentsMRCBodyXYZ = vMomentsMRC;
break;
case atStability:
vMomentsMRCBodyXYZ = Ts2b*vMomentsMRC;
break;
case atWind:
vMomentsMRCBodyXYZ = in.Tw2b*vMomentsMRC;
break;
default:
cerr << endl << " A proper axis type has NOT been selected. Check "
<< "your aerodynamics definition." << endl;
exit(-1);
}
vMoments = vMomentsMRCBodyXYZ + vDXYZcg*vForces; // M = r X F
// Now add the "at CG" values to base forces - after the moments have been
// transferred.
vForces += vForcesAtCG;
vFnative += vFnativeAtCG;
vFw += vFwAtCG;
// Note that we still need to convert to wind axes here, because it is used in
// the L/D calculation, and we still may want to look at Lift and Drag.
//
// JSB 4/27/12 - After use, convert wind axes to produce normal lift and drag
// values - not negative ones!
//
// As a clarification, JSBSim assumes that drag and lift values are defined in
// wind axes - BUT with a 180 rotation about the Y axis. That is, lift and
// drag will be positive up and aft, respectively, so that they are reported
// as positive numbers. However, the wind axes themselves assume that the X
// and Z forces are positive forward and down. Same applies to the stability
// axes.
vFw = in.Tb2w * vForces;
vFw(eDrag) *= -1; vFw(eLift) *= -1;
// Calculate Lift over Drag
if ( fabs(vFw(eDrag)) > 0.0)
lod = fabs( vFw(eLift) / vFw(eDrag));
RunPostFunctions();
@ -300,6 +319,17 @@ bool FGAerodynamics::Run(bool Holding)
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FGColumnVector3 FGAerodynamics::GetForcesInStabilityAxes(void) const
{
FGColumnVector3 vFs = Tb2s*vForces;
// Need sign flips since drag is positive and lift is positive in stability axes
vFs(eDrag) *= -1; vFs(eLift) *= -1;
return vFs;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
bool FGAerodynamics::Load(Element *document)
{
string axis;
@ -309,7 +339,7 @@ bool FGAerodynamics::Load(Element *document)
Name = "Aerodynamics Model: " + document->GetAttributeValue("name");
// Perform base class Pre-Load
if (!FGModel::Load(document))
if (!FGModel::Load(document, true))
return false;
DetermineAxisSystem(document); // Determine if Lift/Side/Drag, etc. is used.
@ -353,7 +383,8 @@ bool FGAerodynamics::Load(Element *document)
try {
ca.push_back( new FGFunction(PropertyManager, function_element) );
} catch (const string& str) {
cerr << endl << fgred << "Error loading aerodynamic function in "
cerr << endl << axis_element->ReadFrom()
<< endl << fgred << "Error loading aerodynamic function in "
<< current_func_name << ":" << str << " Aborting." << reset << endl;
return false;
}
@ -361,7 +392,8 @@ bool FGAerodynamics::Load(Element *document)
try {
ca_atCG.push_back( new FGFunction(PropertyManager, function_element) );
} catch (const string& str) {
cerr << endl << fgred << "Error loading aerodynamic function in "
cerr << endl << axis_element->ReadFrom()
<< endl << fgred << "Error loading aerodynamic function in "
<< current_func_name << ":" << str << " Aborting." << reset << endl;
return false;
}
@ -387,6 +419,9 @@ bool FGAerodynamics::Load(Element *document)
// a warning message will be given IF the AXIAL|NORMAL specifiers are also given.
// This is OK, and the warning is due to the SIDE specifier used for both
// the Lift/Drag and Axial/Normal axis systems.
// Alternatively the axis name 'X|Y|Z or ROLL|PITCH|YAW' can be specified in
// conjunction with a frame 'BODY|STABILITY|WIND', for example:
// <axis name="X" frame="STABILITY"/>
void FGAerodynamics::DetermineAxisSystem(Element* document)
{
@ -394,41 +429,85 @@ void FGAerodynamics::DetermineAxisSystem(Element* document)
string axis;
while (axis_element) {
axis = axis_element->GetAttributeValue("name");
if (axis == "LIFT" || axis == "DRAG") {
if (axisType == atNone) axisType = atLiftDrag;
else if (axisType != atLiftDrag) {
cerr << endl << " Mixed aerodynamic axis systems have been used in the"
<< " aircraft config file. (LIFT DRAG)" << endl;
string frame = axis_element->GetAttributeValue("frame");
if (axis == "X" || axis == "Y" || axis == "Z") {
ProcessAxesNameAndFrame(forceAxisType, axis, frame, axis_element,
"(X Y Z)");
} else if (axis == "ROLL" || axis == "PITCH" || axis == "YAW") {
ProcessAxesNameAndFrame(momentAxisType, axis, frame, axis_element,
"(ROLL PITCH YAW)");
} else if (axis == "LIFT" || axis == "DRAG") {
if (forceAxisType == atNone) forceAxisType = atWind;
else if (forceAxisType != atWind) {
cerr << endl << axis_element->ReadFrom()
<< endl << " Mixed aerodynamic axis systems have been used in the"
<< " aircraft config file. (LIFT DRAG)" << endl;
}
} else if (axis == "SIDE") {
if (axisType != atNone && axisType != atLiftDrag && axisType != atAxialNormal) {
cerr << endl << " Mixed aerodynamic axis systems have been used in the"
<< " aircraft config file. (SIDE)" << endl;
if (forceAxisType != atNone && forceAxisType != atWind && forceAxisType != atBodyAxialNormal) {
cerr << endl << axis_element->ReadFrom()
<< endl << " Mixed aerodynamic axis systems have been used in the"
<< " aircraft config file. (SIDE)" << endl;
}
} else if (axis == "AXIAL" || axis == "NORMAL") {
if (axisType == atNone) axisType = atAxialNormal;
else if (axisType != atAxialNormal) {
cerr << endl << " Mixed aerodynamic axis systems have been used in the"
<< " aircraft config file. (NORMAL AXIAL)" << endl;
if (forceAxisType == atNone) forceAxisType = atBodyAxialNormal;
else if (forceAxisType != atBodyAxialNormal) {
cerr << endl << axis_element->ReadFrom()
<< endl << " Mixed aerodynamic axis systems have been used in the"
<< " aircraft config file. (NORMAL AXIAL)" << endl;
}
} else if (axis == "X" || axis == "Y" || axis == "Z") {
if (axisType == atNone) axisType = atBodyXYZ;
else if (axisType != atBodyXYZ) {
cerr << endl << " Mixed aerodynamic axis systems have been used in the"
<< " aircraft config file. (XYZ)" << endl;
}
} else if (axis != "ROLL" && axis != "PITCH" && axis != "YAW") { // error
cerr << endl << " An unknown axis type, " << axis << " has been specified"
<< " in the aircraft configuration file." << endl;
} else { // error
cerr << endl << axis_element->ReadFrom()
<< endl << " An unknown axis type, " << axis << " has been specified"
<< " in the aircraft configuration file." << endl;
exit(-1);
}
axis_element = document->FindNextElement("axis");
}
if (axisType == atNone) {
axisType = atLiftDrag;
if (forceAxisType == atNone) {
forceAxisType = atWind;
cerr << endl << " The aerodynamic axis system has been set by default"
<< " to the Lift/Side/Drag system." << endl;
}
if (momentAxisType == atNone) {
momentAxisType = atBodyXYZ;
cerr << endl << " The aerodynamic moment axis system has been set by default"
<< " to the bodyXYZ system." << endl;
}
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
void FGAerodynamics::ProcessAxesNameAndFrame(eAxisType& axisType, const string& name,
const string& frame, Element* el,
const string& validNames)
{
if (frame == "BODY" || frame.empty()) {
if (axisType == atNone) axisType = atBodyXYZ;
else if (axisType != atBodyXYZ)
cerr << endl << el->ReadFrom()
<< endl << " Mixed aerodynamic axis systems have been used in the "
<< " aircraft config file." << validNames << " - BODY" << endl;
}
else if (frame == "STABILITY") {
if (axisType == atNone) axisType = atStability;
else if (axisType != atStability)
cerr << endl << el->ReadFrom()
<< endl << " Mixed aerodynamic axis systems have been used in the "
<< " aircraft config file." << validNames << " - STABILITY" << endl;
}
else if (frame == "WIND") {
if (axisType == atNone) axisType = atWind;
else if (axisType != atWind)
cerr << endl << el->ReadFrom()
<< endl << " Mixed aerodynamic axis systems have been used in the "
<< " aircraft config file." << validNames << " - WIND" << endl;
}
else {
cerr << endl << " Unknown axis frame type of - " << frame << endl;
exit(-1);
}
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@ -495,15 +574,24 @@ void FGAerodynamics::bind(void)
{
typedef double (FGAerodynamics::*PMF)(int) const;
PropertyManager->Tie("forces/fbx-aero-lbs", this, 1, (PMF)&FGAerodynamics::GetForces);
PropertyManager->Tie("forces/fby-aero-lbs", this, 2, (PMF)&FGAerodynamics::GetForces);
PropertyManager->Tie("forces/fbz-aero-lbs", this, 3, (PMF)&FGAerodynamics::GetForces);
PropertyManager->Tie("moments/l-aero-lbsft", this, 1, (PMF)&FGAerodynamics::GetMoments);
PropertyManager->Tie("moments/m-aero-lbsft", this, 2, (PMF)&FGAerodynamics::GetMoments);
PropertyManager->Tie("moments/n-aero-lbsft", this, 3, (PMF)&FGAerodynamics::GetMoments);
PropertyManager->Tie("forces/fwx-aero-lbs", this, 1, (PMF)&FGAerodynamics::GetvFw);
PropertyManager->Tie("forces/fwy-aero-lbs", this, 2, (PMF)&FGAerodynamics::GetvFw);
PropertyManager->Tie("forces/fwz-aero-lbs", this, 3, (PMF)&FGAerodynamics::GetvFw);
PropertyManager->Tie("forces/fbx-aero-lbs", this, eX, (PMF)&FGAerodynamics::GetForces);
PropertyManager->Tie("forces/fby-aero-lbs", this, eY, (PMF)&FGAerodynamics::GetForces);
PropertyManager->Tie("forces/fbz-aero-lbs", this, eZ, (PMF)&FGAerodynamics::GetForces);
PropertyManager->Tie("moments/l-aero-lbsft", this, eL, (PMF)&FGAerodynamics::GetMoments);
PropertyManager->Tie("moments/m-aero-lbsft", this, eM, (PMF)&FGAerodynamics::GetMoments);
PropertyManager->Tie("moments/n-aero-lbsft", this, eN, (PMF)&FGAerodynamics::GetMoments);
PropertyManager->Tie("forces/fwx-aero-lbs", this, eDrag, (PMF)&FGAerodynamics::GetvFw);
PropertyManager->Tie("forces/fwy-aero-lbs", this, eSide, (PMF)&FGAerodynamics::GetvFw);
PropertyManager->Tie("forces/fwz-aero-lbs", this, eLift, (PMF)&FGAerodynamics::GetvFw);
PropertyManager->Tie("forces/fsx-aero-lbs", this, eX, (PMF)&FGAerodynamics::GetForcesInStabilityAxes);
PropertyManager->Tie("forces/fsy-aero-lbs", this, eY, (PMF)&FGAerodynamics::GetForcesInStabilityAxes);
PropertyManager->Tie("forces/fsz-aero-lbs", this, eZ, (PMF)&FGAerodynamics::GetForcesInStabilityAxes);
PropertyManager->Tie("moments/roll-stab-aero-lbsft", this, eRoll, (PMF)&FGAerodynamics::GetMomentsInStabilityAxes);
PropertyManager->Tie("moments/pitch-stab-aero-lbsft", this, ePitch, (PMF)&FGAerodynamics::GetMomentsInStabilityAxes);
PropertyManager->Tie("moments/yaw-stab-aero-lbsft", this, eYaw, (PMF)&FGAerodynamics::GetMomentsInStabilityAxes);
PropertyManager->Tie("moments/roll-wind-aero-lbsft", this, eRoll, (PMF)&FGAerodynamics::GetMomentsInWindAxes);
PropertyManager->Tie("moments/pitch-wind-aero-lbsft", this, ePitch, (PMF)&FGAerodynamics::GetMomentsInWindAxes);
PropertyManager->Tie("moments/yaw-wind-aero-lbsft", this, eYaw, (PMF)&FGAerodynamics::GetMomentsInWindAxes);
PropertyManager->Tie("forces/lod-norm", this, &FGAerodynamics::GetLoD);
PropertyManager->Tie("aero/cl-squared", this, &FGAerodynamics::GetClSquared);
PropertyManager->Tie("aero/qbar-area", &qbar_area);
@ -516,6 +604,44 @@ void FGAerodynamics::bind(void)
PropertyManager->Tie("aero/stall-hyst-norm", this, &FGAerodynamics::GetHysteresisParm);
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
//
// Build transformation matrices for transforming from stability axes to
// body axes and to wind axes. Where "a" is alpha and "B" is beta:
//
// The transform from body to stability axes is:
//
// cos(a) 0 sin(a)
// 0 1 0
// -sin(a) 0 cos(a)
//
// The transform from stability to body axes is:
//
// cos(a) 0 -sin(a)
// 0 1 0
// sin(a) 0 cos(a)
//
//
void FGAerodynamics::BuildStabilityTransformMatrices(void)
{
double ca = cos(in.Alpha);
double sa = sin(in.Alpha);
// Stability-to-body
Ts2b(1, 1) = ca;
Ts2b(1, 2) = 0.0;
Ts2b(1, 3) = -sa;
Ts2b(2, 1) = 0.0;
Ts2b(2, 2) = 1.0;
Ts2b(2, 3) = 0.0;
Ts2b(3, 1) = sa;
Ts2b(3, 2) = 0.0;
Ts2b(3, 3) = ca;
Tb2s = Ts2b.Transposed();
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
// The bitmasked value choices are as follows:
// unset: In this case (the default) JSBSim would only print
@ -541,19 +667,22 @@ void FGAerodynamics::Debug(int from)
if (debug_lvl & 1) { // Standard console startup message output
if (from == 2) { // Loader
switch (axisType) {
case (atLiftDrag):
cout << endl << " Aerodynamics (Lift|Side|Drag axes):" << endl << endl;
break;
case (atAxialNormal):
cout << endl << " Aerodynamics (Axial|Side|Normal axes):" << endl << endl;
break;
case (atBodyXYZ):
cout << endl << " Aerodynamics (X|Y|Z axes):" << endl << endl;
break;
switch (forceAxisType) {
case (atWind):
cout << endl << " Aerodynamics (Lift|Side|Drag axes):" << endl << endl;
break;
case (atBodyAxialNormal):
cout << endl << " Aerodynamics (Axial|Side|Normal axes):" << endl << endl;
break;
case (atBodyXYZ):
cout << endl << " Aerodynamics (Body X|Y|Z axes):" << endl << endl;
break;
case (atStability):
cout << endl << " Aerodynamics (Stability X|Y|Z axes):" << endl << endl;
break;
case (atNone):
cout << endl << " Aerodynamics (undefined axes):" << endl << endl;
break;
cout << endl << " Aerodynamics (undefined axes):" << endl << endl;
break;
}
}
}

39
src/FDM/JSBSim/models/FGAerodynamics.h
View file

@ -141,7 +141,7 @@ public:
have found the aerodynamics keyword in the configuration file.
@param element pointer to the current XML element for aerodynamics parameters.
@return true if successful */
bool Load(Element* element);
virtual bool Load(Element* element);
/** Gets the total aerodynamic force vector.
@return a force vector reference. */
@ -181,6 +181,34 @@ public:
axis force. */
double GetvFw(int axis) const { return vFw(axis); }
/** Retrieves the aerodynamic forces in the stability axes.
@return a reference to a column vector containing the stability axis forces. */
FGColumnVector3 GetForcesInStabilityAxes(void) const;
/** Retrieves the aerodynamic forces in the stability axes, given an axis.
@param axis the axis to return the force for (eX, eY, eZ).
@return a reference to a column vector containing the requested stability
axis force. */
double GetForcesInStabilityAxes(int n) const { return GetForcesInStabilityAxes()(n); }
/** Gets the total aerodynamic moment vector about the CG in the stability axes.
@return a moment vector reference. */
FGColumnVector3 GetMomentsInStabilityAxes(void) const { return Tb2s*vMoments; }
/** Gets the aerodynamic moment about the CG for an axis.
@return the moment about a single axis (as described also in the
similar call to GetForces(int n).*/
double GetMomentsInStabilityAxes(int n) const { return GetMomentsInStabilityAxes()(n); }
/** Gets the total aerodynamic moment vector about the CG in the wind axes.
@return a moment vector reference. */
FGColumnVector3 GetMomentsInWindAxes(void) const { return in.Tb2w*vMoments; }
/** Gets the aerodynamic moment about the CG for an axis.
@return the moment about a single axis (as described also in the
similar call to GetForces(int n).*/
double GetMomentsInWindAxes(int n) const { return GetMomentsInWindAxes()(n); }
/** Retrieves the lift over drag ratio */
double GetLoD(void) const { return lod; }
@ -227,21 +255,22 @@ public:
} in;
private:
enum eAxisType {atNone, atLiftDrag, atAxialNormal, atBodyXYZ} axisType;
enum eAxisType {atNone, atWind, atBodyAxialNormal, atBodyXYZ, atStability} forceAxisType, momentAxisType;
typedef std::map<std::string,int> AxisIndex;
AxisIndex AxisIdx;
FGFunction* AeroRPShift;
typedef std::vector <FGFunction*> AeroFunctionArray;
AeroFunctionArray* AeroFunctions;
FGMatrix33 Ts2b, Tb2s;
FGColumnVector3 vFnative;
FGColumnVector3 vFw;
FGColumnVector3 vForces;
AeroFunctionArray* AeroFunctionsAtCG;
FGColumnVector3 vFwAtCG;
FGColumnVector3 vFnativeAtCG;
FGColumnVector3 vForcesAtCG;
FGColumnVector3 vMoments;
FGColumnVector3 vMomentsMRC;
FGColumnVector3 vMomentsMRCBodyXYZ;
FGColumnVector3 vDXYZcg;
FGColumnVector3 vDeltaRP;
double alphaclmax, alphaclmin;
@ -253,7 +282,11 @@ private:
typedef double (FGAerodynamics::*PMF)(int) const;
void DetermineAxisSystem(Element* document);
void ProcessAxesNameAndFrame(FGAerodynamics::eAxisType& axisType,
const string& name, const string& frame,
Element* el, const string& validNames);
void bind(void);
void BuildStabilityTransformMatrices(void);
void Debug(int from);
};

5
src/FDM/JSBSim/models/FGAircraft.cpp
View file

@ -78,7 +78,6 @@ FGAircraft::FGAircraft(FGFDMExec* fdmex) : FGModel(fdmex)
lbarh = lbarv = 0.0;
vbarh = vbarv = 0.0;
WingIncidence = 0.0;
PitotAngle = 0.0;
bind();
@ -137,7 +136,7 @@ bool FGAircraft::Load(Element* el)
string element_name;
Element* element;
if (!FGModel::Load(el)) return false;
if (!FGModel::Load(el, true)) return false;
if (el->FindElement("wingarea"))
WingArea = el->FindElementValueAsNumberConvertTo("wingarea", "FT2");
@ -155,8 +154,6 @@ bool FGAircraft::Load(Element* el)
VTailArea = el->FindElementValueAsNumberConvertTo("vtailarea", "FT2");
if (el->FindElement("vtailarm"))
VTailArm = el->FindElementValueAsNumberConvertTo("vtailarm", "FT");
if (el->FindElement("pitot_angle"))
PitotAngle = el->FindElementValueAsNumberConvertTo("pitot_angle", "RAD");
// Find all LOCATION elements that descend from this METRICS branch of the
// config file. This would be CG location, eyepoint, etc.

6
src/FDM/JSBSim/models/FGAircraft.h
View file

@ -78,7 +78,6 @@ CLASS DOCUMENTATION
<vtailarea unit="{FT2 | M}"> {number} </vtailarea>
<vtailarm unit="{FT | M}"> {number} </vtailarm>
<wing_incidence unit="{RAD | DEG}"> {number} </wing_incidence>
<pitot_angle unit="{RAD | DEG}"> {number} </pitot_angle>
<location name="{AERORP | EYEPOINT | VRP}" unit="{IN | M}">
<x> {number} </x>
<y> {number} </y>
@ -132,7 +131,7 @@ public:
The executive calls this method to load the aircraft into JSBSim.
@param el a pointer to the element tree
@return true if successful */
bool Load(Element* el);
virtual bool Load(Element* el);
/** Gets the aircraft name
@return the name of the aircraft as a string type */
@ -144,7 +143,6 @@ public:
double GetWingSpan(void) const { return WingSpan; }
/// Gets the average wing chord
double Getcbar(void) const { return cbar; }
double GetPitotAngle(void) const { return PitotAngle; }
double GetWingIncidence(void) const { return WingIncidence; }
double GetWingIncidenceDeg(void) const { return WingIncidence*radtodeg; }
double GetHTailArea(void) const { return HTailArea; }
@ -197,7 +195,7 @@ private:
double WingArea, WingSpan, cbar, WingIncidence;
double HTailArea, VTailArea, HTailArm, VTailArm;
double lbarh,lbarv,vbarh,vbarv,PitotAngle;
double lbarh,lbarv,vbarh,vbarv;
std::string AircraftName;
void Debug(int from);

19
src/FDM/JSBSim/models/FGAtmosphere.cpp
View file

@ -50,13 +50,24 @@ INCLUDES
namespace JSBSim {
IDENT(IdSrc,"$Id: FGAtmosphere.cpp,v 1.61 2016/01/10 19:22:12 bcoconni Exp $");
IDENT(IdSrc,"$Id: FGAtmosphere.cpp,v 1.62 2016/01/16 12:05:47 bcoconni Exp $");
IDENT(IdHdr,ID_ATMOSPHERE);
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS IMPLEMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
// Atmosphere constants in British units converted from the SI values specified in the
// ISA document - https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19770009539.pdf
const double KtoDegR = 1.8; // Kelvin to degree Rankine
const double FGAtmosphere::Rstar = 8.31432 * (FGJSBBase::kgtoslug / (KtoDegR * FGJSBBase::fttom * FGJSBBase::fttom)); // ft*lbf/R/mol
const double FGAtmosphere::Mair = 28.9645 * FGJSBBase::kgtoslug / 1000.0; // slug/mol
const double FGAtmosphere::g0 = 9.80665 / FGJSBBase::fttom; // ft/s^2
double FGAtmosphere::Reng = Rstar / Mair;
const double FGAtmosphere::SHRatio = 1.40;
FGAtmosphere::FGAtmosphere(FGFDMExec* fdmex) : FGModel(fdmex),
PressureAltitude(0.0), // ft
DensityAltitude(0.0), // ft
@ -84,7 +95,7 @@ bool FGAtmosphere::InitModel(void)
Calculate(0.0);
SLtemperature = Temperature = 518.67;
SLpressure = Pressure = 2116.22;
SLpressure = Pressure = 2116.228;
SLdensity = Density = Pressure/(Reng*Temperature);
SLsoundspeed = Soundspeed = sqrt(SHRatio*Reng*(Temperature));
@ -130,8 +141,8 @@ void FGAtmosphere::Calculate(double altitude)
Density = node->GetDouble("atmosphere/override/density");
Soundspeed = sqrt(SHRatio*Reng*(Temperature));
PressureAltitude = altitude;
DensityAltitude = altitude;
PressureAltitude = CalculatePressureAltitude(Pressure, altitude);
DensityAltitude = CalculateDensityAltitude(Density, altitude);
Viscosity = Beta * pow(Temperature, 1.5) / (SutherlandConstant + Temperature);
KinematicViscosity = Viscosity / Density;

22
src/FDM/JSBSim/models/FGAtmosphere.h
View file

@ -232,6 +232,20 @@ protected:
/// Calculate the atmosphere for the given altitude.
void Calculate(double altitude);
/// Calculates the density altitude given any temperature or pressure bias.
/// Calculated density for the specified geometric altitude given any temperature
/// or pressure biases is passed in.
/// @param density
/// @param geometricAlt
virtual double CalculateDensityAltitude(double density, double geometricAlt) { return geometricAlt; }
/// Calculates the pressure altitude given any temperature or pressure bias.
/// Calculated pressure for the specified geometric altitude given any temperature
/// or pressure biases is passed in.
/// @param pressure
/// @param geometricAlt
virtual double CalculatePressureAltitude(double pressure, double geometricAlt) { return geometricAlt; }
// Converts to Rankine from one of several unit systems.
virtual double ConvertToRankine(double t, eTemperature unit) const;
@ -241,6 +255,14 @@ protected:
// Converts from PSF (pounds per square foot) to one of several unit systems.
virtual double ConvertFromPSF(double t, ePressure unit=ePSF) const;
static const double Rstar; // Universal gas constant - ft*lbf/R/mol
static const double Mair; // Mean molecular weight - slug/mol
static const double g0; // Sea-level acceleration of gravity - ft/s^2
static double Reng; // Specific gas constant - ft*lbf/slug/R
static const double SHRatio;
virtual void bind(void);
void Debug(int from);
};

44
src/FDM/JSBSim/models/FGAuxiliary.cpp
View file

@ -68,10 +68,10 @@ FGAuxiliary::FGAuxiliary(FGFDMExec* fdmex) : FGModel(fdmex)
vcas = veas = 0.0;
qbar = qbarUW = qbarUV = 0.0;
Mach = MachU = MachPitot = 0.0;
Mach = MachU = 0.0;
alpha = beta = 0.0;
adot = bdot = 0.0;
gamma = Vt = Vground = Vpitot = 0.0;
gamma = Vt = Vground = 0.0;
psigt = 0.0;
day_of_year = 1;
seconds_in_day = 0.0;
@ -84,8 +84,6 @@ FGAuxiliary::FGAuxiliary(FGFDMExec* fdmex) : FGModel(fdmex)
vAeroUVW.InitMatrix();
vAeroPQR.InitMatrix();
vMachUVW.InitMatrix();
vWindUVW.InitMatrix();
vPitotUVW.InitMatrix();
vEuler.InitMatrix();
vEulerRates.InitMatrix();
@ -106,10 +104,10 @@ bool FGAuxiliary::InitModel(void)
vcas = veas = 0.0;
qbar = qbarUW = qbarUV = 0.0;
Mach = MachU = MachPitot = 0.0;
Mach = MachU = 0.0;
alpha = beta = 0.0;
adot = bdot = 0.0;
gamma = Vt = Vground = Vpitot = 0.0;
gamma = Vt = Vground = 0.0;
psigt = 0.0;
day_of_year = 1;
seconds_in_day = 0.0;
@ -206,20 +204,14 @@ bool FGAuxiliary::Run(bool Holding)
tat = in.Temperature*(1 + 0.2*Mach*Mach); // Total Temperature, isentropic flow
tatc = RankineToCelsius(tat);
// Pitot
pt = PitotTotalPressure(Mach, in.Pressure);
vWindUVW(eU) = Vt;
vPitotUVW = mTw2p * vWindUVW;
Vpitot = vPitotUVW(eU);
if (Vpitot < 0.0) Vpitot = 0.0;
MachPitot = Vpitot / in.SoundSpeed;
pt = PitotTotalPressure(MachPitot, in.Pressure);
if (abs(MachPitot) > 0.0) {
vcas = VcalibratedFromMach(MachPitot, in.Pressure, in.PressureSL, in.DensitySL);
if (abs(Mach) > 0.0) {
vcas = VcalibratedFromMach(Mach, in.Pressure, in.PressureSL, in.DensitySL);
veas = sqrt(2 * qbar / in.DensitySL);
vtrue = 1116.43559 * Mach * sqrt(in.Temperature / 518.67);
} else {
}
else {
vcas = veas = vtrue = 0.0;
}
@ -284,23 +276,6 @@ void FGAuxiliary::UpdateWindMatrices(void)
mTw2b(3,3) = ca;
mTb2w = mTw2b.Transposed();
// The pitot frame is the same as the body frame except rotated about the
// Y axis by the pitot attachment angle.
ca = cos(alpha + in.PitotAngle);
sa = sin(alpha + in.PitotAngle);
mTw2p(1,1) = ca*cb;
mTw2p(1,2) = -ca*sb;
mTw2p(1,3) = -sa;
mTw2p(2,1) = sb;
mTw2p(2,2) = cb;
mTw2p(2,3) = 0.0;
mTw2p(3,1) = sa*cb;
mTw2p(3,2) = -sa*sb;
mTw2p(3,3) = ca;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@ -424,6 +399,7 @@ void FGAuxiliary::bind(void)
PropertyManager->Tie("aero/h_b-cg-ft", this, &FGAuxiliary::GetHOverBCG);
PropertyManager->Tie("aero/h_b-mac-ft", this, &FGAuxiliary::GetHOverBMAC);
PropertyManager->Tie("flight-path/gamma-rad", this, &FGAuxiliary::GetGamma);
PropertyManager->Tie("flight-path/gamma-deg", this, inDegrees, (PMF)&FGAuxiliary::GetGamma);
PropertyManager->Tie("flight-path/psi-gt-rad", this, &FGAuxiliary::GetGroundTrack);
PropertyManager->Tie("position/distance-from-start-lon-mt", this, &FGAuxiliary::GetLongitudeRelativePosition);

13
src/FDM/JSBSim/models/FGAuxiliary.h
View file

@ -236,6 +236,11 @@ public:
double GetGamma(void) const { return gamma; }
double GetGroundTrack(void) const { return psigt; }
double GetGamma(int unit) const {
if (unit == inDegrees) return gamma*radtodeg;
else return BadUnits();
}
double GetHeadWind(void) const;
double GetCrossWind(void) const;
@ -289,7 +294,6 @@ public:
FGColumnVector3 TurbPQR;
double WindPsi;
double Vwind;
double PitotAngle;
} in;
private:
@ -298,7 +302,6 @@ private:
FGMatrix33 mTw2b;
FGMatrix33 mTb2w;
FGMatrix33 mTw2p;
FGColumnVector3 vPilotAccel;
FGColumnVector3 vPilotAccelN;
@ -309,12 +312,10 @@ private:
FGColumnVector3 vEuler;
FGColumnVector3 vEulerRates;
FGColumnVector3 vMachUVW;
FGColumnVector3 vWindUVW;
FGColumnVector3 vPitotUVW;
FGLocation vLocationVRP;
double Vt, Vground, Vpitot;
double Mach, MachU, MachPitot;
double Vt, Vground;
double Mach, MachU;
double qbar, qbarUW, qbarUV;
double Re; // Reynolds Number = V*c/mu
double alpha, beta;

2
src/FDM/JSBSim/models/FGBuoyantForces.cpp
View file

@ -123,7 +123,7 @@ bool FGBuoyantForces::Load(Element *document)
Debug(2);
// Perform base class Pre-Load
if (!FGModel::Load(document))
if (!FGModel::Load(document, true))
return false;
gas_cell_element = document->FindElement("gas_cell");

2
src/FDM/JSBSim/models/FGBuoyantForces.h
View file

@ -128,7 +128,7 @@ public:
have found the Buoyant_forces keyword in the configuration file.
@param element pointer to the current XML element for Buoyant forces parameters.
@return true if successful */
bool Load(Element* element);
virtual bool Load(Element* element);
/** Gets the total Buoyant force vector.
@return a force vector in lbs. */

2
src/FDM/JSBSim/models/FGExternalReactions.cpp
View file

@ -72,7 +72,7 @@ FGExternalReactions::FGExternalReactions(FGFDMExec* fdmex) : FGModel(fdmex)
bool FGExternalReactions::Load(Element* el)
{
// Call the base class Load() function to load interface properties.
if (!FGModel::Load(el))
if (!FGModel::Load(el, true))
return false;
Debug(2);

2
src/FDM/JSBSim/models/FGExternalReactions.h
View file

@ -155,7 +155,7 @@ public:
a FGExternalForce object will be instantiated for each force definition.
@param el a pointer to the XML element holding the external reactions definition.
*/
bool Load(Element* el);
virtual bool Load(Element* el);
/** Retrieves the total forces defined in the external reactions.
@return the total force in pounds.

2
src/FDM/JSBSim/models/FGFCS.cpp
View file

@ -490,7 +490,7 @@ bool FGFCS::Load(Element* document)
}
// Load interface properties from document
if (!FGModel::Load(document))
if (!FGModel::Load(document, true))
return false;
Name += document->GetAttributeValue("name");

2
src/FDM/JSBSim/models/FGFCS.h
View file

@ -542,7 +542,7 @@ public:
Load() is called from FGFDMExec.
@param el pointer to the Element instance
@return true if succesful */
bool Load(Element* el);
virtual bool Load(Element* el);
SGPath FindFullPathName(const SGPath& path) const;

2
src/FDM/JSBSim/models/FGGroundReactions.cpp
View file

@ -158,7 +158,7 @@ bool FGGroundReactions::Load(Element* document)
Debug(2);
// Perform base class Pre-Load
if (!FGModel::Load(document))
if (!FGModel::Load(document, true))
return false;
unsigned int numContacts = document->GetNumElements("contact");

2
src/FDM/JSBSim/models/FGGroundReactions.h
View file

@ -93,7 +93,7 @@ public:
"Resume" command to be given.
@return false if no error */
bool Run(bool Holding);
bool Load(Element* el);
virtual bool Load(Element* el);
const FGColumnVector3& GetForces(void) const {return vForces;}
double GetForces(int idx) const {return vForces(idx);}
const FGColumnVector3& GetMoments(void) const {return vMoments;}

2
src/FDM/JSBSim/models/FGMassBalance.cpp
View file

@ -134,7 +134,7 @@ bool FGMassBalance::Load(Element* document)
Name = "Mass Properties Model: " + document->GetAttributeValue("name");
// Perform base class Pre-Load
if (!FGModel::Load(document))
if (!FGModel::Load(document, true))
return false;
SetAircraftBaseInertias(ReadInertiaMatrix(document));

2
src/FDM/JSBSim/models/FGMassBalance.h
View file

@ -111,7 +111,7 @@ public:
FGMassBalance(FGFDMExec*);
~FGMassBalance();
bool Load(Element* el);
virtual bool Load(Element* el);
bool InitModel(void);
/** Runs the Mass Balance model; called by the Executive
Can pass in a value indicating if the executive is directing the simulation to Hold.

20
src/FDM/JSBSim/models/FGModel.cpp
View file

@ -110,7 +110,7 @@ SGPath FGModel::FindFullPathName(const SGPath& path) const
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
bool FGModel::Load(Element* el)
bool FGModel::Load(Element* el, bool preLoad)
{
FGModelLoader ModelLoader(this);
Element* document = ModelLoader.Open(el);
@ -124,17 +124,21 @@ bool FGModel::Load(Element* el)
return false;
}
bool result = FGModelFunctions::Load(document, PropertyManager);
bool result = true;
if (preLoad)
result = FGModelFunctions::Load(document, PropertyManager);
if (document != el) {
el->MergeAttributes(document);
// After reading interface properties in a file, read properties in the
// local model element. This allows general-purpose models to be defined in
// a file, with overrides or initial loaded constants supplied in the
// relevant element of the aircraft configuration file.
LocalProperties.Load(el, PropertyManager, true);
if (preLoad) {
// After reading interface properties in a file, read properties in the
// local model element. This allows general-purpose models to be defined
// in a file, with overrides or initial loaded constants supplied in the
// relevant element of the aircraft configuration file.
LocalProperties.Load(el, PropertyManager, true);
}
Element* element = document->FindElement();
while (element) {

6
src/FDM/JSBSim/models/FGModel.h
View file

@ -108,9 +108,11 @@ protected:
unsigned int rate;
/** Loads this model.
@param el a pointer to the element
@param el a pointer to the element
@param preLoad true if model functions and local properties must be
preloaded.
@return true if model is successfully loaded*/
virtual bool Load(Element* el);
virtual bool Load(Element* el, bool preLoad);
virtual void Debug(int from);

61
src/FDM/JSBSim/models/FGOutput.cpp
View file

@ -44,10 +44,10 @@ INCLUDES
#include "input_output/FGOutputSocket.h"
#include "input_output/FGOutputTextFile.h"
#include "input_output/FGOutputFG.h"
#include "input_output/FGUDPOutputSocket.h"
#include "input_output/FGXMLFileRead.h"
#include "input_output/FGXMLElement.h"
#include "input_output/FGModelLoader.h"
#include "math/FGTemplateFunc.h"
using namespace std;
@ -76,9 +76,9 @@ FGOutput::FGOutput(FGFDMExec* fdmex) : FGModel(fdmex)
FGOutput::~FGOutput()
{
vector<FGOutputType*>::iterator it;
for (it = OutputTypes.begin(); it != OutputTypes.end(); ++it)
delete (*it);
vector<FGOutputType*>::iterator itv;
for (itv = OutputTypes.begin(); itv != OutputTypes.end(); ++itv)
delete (*itv);
Debug(1);
}
@ -221,9 +221,6 @@ bool FGOutput::Load(int subSystems, std::string protocol, std::string type,
} else if (type == "FLIGHTGEAR") {
Output = new FGOutputFG(FDMExec);
name += ":" + port + "/" + protocol;
} else if (type == "QTJSBSIM") {
Output = new FGUDPOutputSocket(FDMExec);
name += ":" + port + "/" + protocol;
} else if (type == "TERMINAL") {
// Not done yet
} else if (type != string("NONE")) {
@ -246,22 +243,30 @@ bool FGOutput::Load(int subSystems, std::string protocol, std::string type,
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
bool FGOutput::Load(Element* el)
bool FGOutput::Load(Element* document, const SGPath& dir)
{
// Unlike the other FGModel classes, properties listed in the <output> section
// are not intended to create new properties. For that reason, FGOutput
// cannot load its XML directives with FGModel::Load().
// Instead FGModelLoader::Open() and FGModel::PreLoad() must be explicitely
// called.
FGModelLoader ModelLoader(this);
Element* element = ModelLoader.Open(el);
// Optional path to use for included files
includePath = dir;
if (!element) return false;
// Perform base class Pre-Load
if (!FGModel::Load(document, false))
return false;
FGModel::PreLoad(element, PropertyManager);
Element *function = document->FindElement("function");
while (function) {
string fType = function->GetAttributeValue("type");
if (fType == "template") {
string name = function->GetAttributeValue("name");
TemplateFunctions[name] = new FGTemplateFunc(PropertyManager, function);
}
function = document->FindNextElement("function");
}
size_t idx = OutputTypes.size();
string type = element->GetAttributeValue("type");
string type = document->GetAttributeValue("type");
FGOutputType* Output = 0;
if (debug_lvl > 0) cout << endl << " Output data set: " << idx << " " << endl;
@ -276,8 +281,6 @@ bool FGOutput::Load(Element* el)
Output = new FGOutputSocket(FDMExec);
} else if (type == "FLIGHTGEAR") {
Output = new FGOutputFG(FDMExec);
} else if (type == "QTJSBSIM") {
Output = new FGUDPOutputSocket(FDMExec);
} else if (type == "TERMINAL") {
// Not done yet
} else if (type != string("NONE")) {
@ -287,8 +290,9 @@ bool FGOutput::Load(Element* el)
if (!Output) return false;
Output->SetIdx(idx);
Output->Load(element);
PostLoad(element, PropertyManager);
Output->PreLoad(document, PropertyManager);
Output->Load(document);
Output->PostLoad(document, PropertyManager);
OutputTypes.push_back(Output);
@ -296,6 +300,19 @@ bool FGOutput::Load(Element* el)
return true;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
SGPath FGOutput::FindFullPathName(const SGPath& path) const
{
// Check optional include path if set
if (!includePath.isNull()) {
SGPath name = CheckPathName(includePath, path);
if (!name.isNull()) return name;
}
return FGModel::FindFullPathName(path);
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
// The bitmasked value choices are as follows:
// unset: In this case (the default) JSBSim would only print

15
src/FDM/JSBSim/models/FGOutput.h
View file

@ -42,6 +42,7 @@ INCLUDES
#include "FGModel.h"
#include "input_output/FGOutputType.h"
#include "math/FGTemplateFunc.h"
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
DEFINITIONS
@ -199,8 +200,9 @@ public:
/** Load the output directives and adds a new output instance to the Output
Manager list.
@param el XMLElement that is pointing to the output directives
@param dir optional directory path to load included files from
@result true if the execution succeeded. */
bool Load(Element* el);
virtual bool Load(Element* el, const SGPath& dir = SGPath());
/** Load the output directives and adds a new output instance to the Output
Manager list. Unlike the Load() method, the new output instance is not
generated from output directives read in a XML file but from a list of
@ -222,9 +224,20 @@ public:
@result the name identifier.*/
std::string GetOutputName(unsigned int idx) const;
SGPath FindFullPathName(const SGPath& path) const;
FGTemplateFunc* GetTemplateFunc(const std::string& name) {
if (TemplateFunctions.count(name))
return TemplateFunctions[name];
else
return NULL;
}
private:
std::vector<FGOutputType*> OutputTypes;
std::map<std::string, FGTemplateFunc_ptr> TemplateFunctions;
bool enabled;
SGPath includePath;
void Debug(int from);
};

2
src/FDM/JSBSim/models/FGPropulsion.cpp
View file

@ -373,7 +373,7 @@ bool FGPropulsion::Load(Element* el)
Name = "Propulsion Model: " + el->GetAttributeValue("name");
// Perform base class Pre-Load
if (!FGModel::Load(el))
if (!FGModel::Load(el, true))
return false;
// Process tank definitions first to establish the number of fuel tanks

2
src/FDM/JSBSim/models/FGPropulsion.h
View file

@ -128,7 +128,7 @@ public:
Characteristics of the propulsion system are read in from the config file.
@param el pointer to an XML element that contains the engine information.
@return true if successfully loaded, otherwise false */
bool Load(Element* el);
virtual bool Load(Element* el);
/// Retrieves the number of engines defined for the aircraft.
unsigned int GetNumEngines(void) const {return (unsigned int)Engines.size();}

309
src/FDM/JSBSim/models/atmosphere/FGStandardAtmosphere.cpp
View file

@ -57,14 +57,16 @@ IDENT(IdHdr,ID_STANDARDATMOSPHERE);
CLASS IMPLEMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
FGStandardAtmosphere::FGStandardAtmosphere(FGFDMExec* fdmex) : FGAtmosphere(fdmex),
TemperatureBias(0.0),
TemperatureDeltaGradient(0.0)
// Effective radius of the earth at a specific latitude per ISA 1976 (converted to ft)
// r0 = 6356766 m
const double FGStandardAtmosphere::EarthRadius = 6356766.0/FGJSBBase::fttom;
FGStandardAtmosphere::FGStandardAtmosphere(FGFDMExec* fdmex)
: FGAtmosphere(fdmex), TemperatureBias(0.0), TemperatureDeltaGradient(0.0),
StdAtmosTemperatureTable(9)
{
Name = "FGStandardAtmosphere";
StdAtmosTemperatureTable = new FGTable(9);
// This is the U.S. Standard Atmosphere table for temperature in degrees
// Rankine, based on geometric altitude. The table values are often given
// in literature relative to geopotential altitude.
@ -72,36 +74,35 @@ FGStandardAtmosphere::FGStandardAtmosphere(FGFDMExec* fdmex) : FGAtmosphere(fdme
// GeoMet Alt Temp GeoPot Alt GeoMet Alt
// (ft) (deg R) (km) (km)
// -------- -------- ---------- ----------
//*StdAtmosTemperatureTable << 0.00 << 518.67 // 0.000 0.000
// << 36151.80 << 389.97 // 11.000 11.019
// << 65823.90 << 389.97 // 20.000 20.063
// << 105518.06 << 411.60 // 32.000 32.162
// << 155348.07 << 487.20 // 47.000 47.350
// << 168676.12 << 487.20 // 51.000 51.413
// << 235570.77 << 386.40 // 71.000 71.802
// << 282152.08 << 336.50 // 84.852 86.000
// << 298556.40 << 336.50; // 91.000 - First layer in high altitude regime
//StdAtmosTemperatureTable << 0.00 << 518.67 // 0.000 0.000
// << 36151.80 << 389.97 // 11.000 11.019
// << 65823.90 << 389.97 // 20.000 20.063
// << 105518.06 << 411.60 // 32.000 32.162
// << 155348.07 << 487.20 // 47.000 47.350
// << 168676.12 << 487.20 // 51.000 51.413
// << 235570.77 << 386.40 // 71.000 71.802
// << 282152.08 << 336.50 // 84.852 86.000
// << 298556.40 << 336.50; // 91.000 - First layer in high altitude regime
// GeoPot Alt Temp GeoPot Alt GeoMet Alt
// (ft) (deg R) (km) (km)
// ----------- -------- ---------- ----------
*StdAtmosTemperatureTable << 0.0000 << 518.67 // 0.000 0.000
<< 36089.2388 << 389.97 // 11.000 11.019
<< 65616.7979 << 389.97 // 20.000 20.063
<< 104986.8766 << 411.57 // 32.000 32.162
<< 154199.4751 << 487.17 // 47.000 47.350
<< 167322.8346 << 487.17 // 51.000 51.413
<< 232939.6325 << 386.37 // 71.000 71.802
<< 278385.8268 << 336.50 // 84.852 86.000
<< 298556.40 << 336.50; // 91.000 - First layer in high altitude regime
StdAtmosTemperatureTable << 0.0000 << 518.67 // 0.000 0.000
<< 36089.2388 << 389.97 // 11.000 11.019
<< 65616.7979 << 389.97 // 20.000 20.063
<< 104986.8766 << 411.57 // 32.000 32.162
<< 154199.4751 << 487.17 // 47.000 47.350
<< 167322.8346 << 487.17 // 51.000 51.413
<< 232939.6325 << 386.37 // 71.000 71.802
<< 278385.8268 << 336.5028 // 84.852 86.000
<< 298556.4304 << 336.5028; // 91.000 - First layer in high altitude regime
LapseRateVector.resize(StdAtmosTemperatureTable->GetNumRows()-1);
PressureBreakpointVector.resize(StdAtmosTemperatureTable->GetNumRows());
PressureBreakpointVector.resize(StdAtmosTemperatureTable.GetNumRows());
// Assume the altitude to fade out the gradient at is at the highest
// altitude in the table. Above that, other functions are used to
// calculate temperature.
GradientFadeoutAltitude = (*StdAtmosTemperatureTable)(StdAtmosTemperatureTable->GetNumRows(),0);
GradientFadeoutAltitude = StdAtmosTemperatureTable(StdAtmosTemperatureTable.GetNumRows(),0);
bind();
Debug(0);
@ -111,8 +112,6 @@ FGStandardAtmosphere::FGStandardAtmosphere(FGFDMExec* fdmex) : FGAtmosphere(fdme
FGStandardAtmosphere::~FGStandardAtmosphere()
{
delete StdAtmosTemperatureTable;
LapseRateVector.clear();
Debug(1);
}
@ -120,16 +119,22 @@ FGStandardAtmosphere::~FGStandardAtmosphere()
bool FGStandardAtmosphere::InitModel(void)
{
PressureBreakpointVector[0] = StdSLpressure = 2116.22; // psf
PressureBreakpointVector[0] = StdSLpressure = SLpressure = Pressure = 2116.228; // psf
TemperatureDeltaGradient = 0.0;
TemperatureBias = 0.0;
CalculateLapseRates();
CalculatePressureBreakpoints();
StdSLtemperature = SLtemperature = StdAtmosTemperatureTable(1, 1);
StdSLdensity = SLdensity = StdSLpressure / (Reng * StdSLtemperature);
StdPressureBreakpointVector = PressureBreakpointVector;
CalculateStdDensityBreakpoints();
Calculate(0.0);
StdSLtemperature = SLtemperature = Temperature;
SLpressure = Pressure;
StdSLdensity = SLdensity = Density;
StdSLsoundspeed = SLsoundspeed = Soundspeed;
StdSLsoundspeed = SLsoundspeed = Soundspeed;
rSLtemperature = 1/SLtemperature ;
rSLpressure = 1/SLpressure ;
@ -143,43 +148,39 @@ bool FGStandardAtmosphere::InitModel(void)
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
// Get the actual pressure as modeled at a specified altitude
// These calculations are from equations 33a and 33b in the U.S. Standard Atmosphere
// document referenced in the documentation for this code.
// These calculations are from equations 33a and 33b in the U.S. Standard
// Atmosphere document referenced in the documentation for this code.
double FGStandardAtmosphere::GetPressure(double altitude) const
{
unsigned int b=0;
double pressure = 0.0;
double Lmb, Exp, Tmb, deltaH, factor;
double numRows = StdAtmosTemperatureTable->GetNumRows();
double GeoPotAlt = GeopotentialAltitude(altitude);
// Iterate through the altitudes to find the current Base Altitude
// in the table. That is, if the current altitude (the argument passed in)
// is 20000 ft, then the base altitude from the table is 0.0. If the
// passed-in altitude is 40000 ft, the base altitude is 36089.2388 ft (and
// the index "b" is 2 - the second entry in the table).
double testAlt = (*StdAtmosTemperatureTable)(b+1,0);
double GeoPotAlt = (altitude*20855531.5)/(20855531.5+altitude);
while ((GeoPotAlt >= testAlt) && (b <= numRows-2)) {
b++;
testAlt = (*StdAtmosTemperatureTable)(b+1,0);
}
if (b>0) b--;
double BaseAlt = StdAtmosTemperatureTable(1,0);
unsigned int numRows = StdAtmosTemperatureTable.GetNumRows();
unsigned int b;
double BaseAlt = (*StdAtmosTemperatureTable)(b+1,0);
Tmb = GetTemperature(BaseAlt);
deltaH = GeoPotAlt - BaseAlt;
if (LapseRateVector[b] != 0.00) {
Lmb = LapseRateVector[b];
Exp = Mair/(Rstar*Lmb);
factor = Tmb/(Tmb + Lmb*deltaH);
pressure = PressureBreakpointVector[b]*pow(factor, Exp);
} else {
pressure = PressureBreakpointVector[b]*exp(-Mair*deltaH/(Rstar*Tmb));
for (b=0; b < numRows-2; ++b) {
double testAlt = StdAtmosTemperatureTable(b+2,0);
if (GeoPotAlt < testAlt)
break;
BaseAlt = testAlt;
}
return pressure;
double Tmb = GetTemperature(GeometricAltitude(BaseAlt));
double deltaH = GeoPotAlt - BaseAlt;
double Lmb = LapseRateVector[b];
if (Lmb != 0.0) {
double Exp = g0*Mair / (Rstar*Lmb);
double factor = Tmb/(Tmb + Lmb*deltaH);
return PressureBreakpointVector[b]*pow(factor, Exp);
} else
return PressureBreakpointVector[b]*exp(-g0*Mair*deltaH/(Rstar*Tmb));
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@ -198,11 +199,23 @@ void FGStandardAtmosphere::SetPressureSL(ePressure unit, double pressure)
double FGStandardAtmosphere::GetTemperature(double altitude) const
{
double GeoPotAlt = (altitude*20855531.5)/(20855531.5+altitude);
double GeoPotAlt = GeopotentialAltitude(altitude);
double T = StdAtmosTemperatureTable->GetValue(GeoPotAlt) + TemperatureBias;
if (altitude <= GradientFadeoutAltitude)
T += TemperatureDeltaGradient * (GradientFadeoutAltitude - altitude);
double T;
if (GeoPotAlt >= 0.0) {
T = StdAtmosTemperatureTable.GetValue(GeoPotAlt);
if (GeoPotAlt <= GradientFadeoutAltitude)
T -= TemperatureDeltaGradient * GeoPotAlt;
}
else {
// We don't need to add TemperatureDeltaGradient*GeoPotAlt here because
// the lapse rate vector already accounts for the temperature gradient.
T = StdAtmosTemperatureTable.GetValue(0.0) + GeoPotAlt*LapseRateVector[0];
}
T += TemperatureBias + TemperatureDeltaGradient * GradientFadeoutAltitude;
return T;
}
@ -218,8 +231,12 @@ double FGStandardAtmosphere::GetStdTemperature(double altitude) const
if (altitude < 298556.4) { // 91 km - station 8
double GeoPotAlt = (altitude*20855531.5)/(20855531.5+altitude);
temp = StdAtmosTemperatureTable->GetValue(GeoPotAlt);
double GeoPotAlt = GeopotentialAltitude(altitude);
if (GeoPotAlt >= 0.0)
temp = StdAtmosTemperatureTable.GetValue(GeoPotAlt);
else
temp = StdAtmosTemperatureTable.GetValue(0.0) + GeoPotAlt*LapseRateVector[0];
} else if (altitude < 360892.4) { // 110 km - station 9
@ -244,42 +261,34 @@ double FGStandardAtmosphere::GetStdTemperature(double altitude) const
double FGStandardAtmosphere::GetStdPressure(double altitude) const
{
double press=0;
if (TemperatureBias == 0.0 && TemperatureDeltaGradient == 0.0 && PressureBreakpointVector[0] == StdSLpressure) {
press = GetPressure(altitude);
} else if (altitude <= 100000.0) {
GetStdPressure100K(altitude);
} else {
// Cannot currently retrieve the standard pressure
double GeoPotAlt = GeopotentialAltitude(altitude);
// Iterate through the altitudes to find the current Base Altitude
// in the table. That is, if the current altitude (the argument passed in)
// is 20000 ft, then the base altitude from the table is 0.0. If the
// passed-in altitude is 40000 ft, the base altitude is 36089.2388 ft (and
// the index "b" is 2 - the second entry in the table).
double BaseAlt = StdAtmosTemperatureTable(1,0);
unsigned int numRows = StdAtmosTemperatureTable.GetNumRows();
unsigned int b;
for (b=0; b < numRows-2; ++b) {
double testAlt = StdAtmosTemperatureTable(b+2,0);
if (GeoPotAlt < testAlt)
break;
BaseAlt = testAlt;
}
return press;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
// This function calculates an approximation of the standard atmospheric pressure
// up to an altitude of about 100,000 ft. If the temperature and pressure are not
// altered for local conditions, the GetPressure(h) function should be used,
// as that is valid to a much higher altitude. This function is accurate to within
// a couple of psf up to 100K ft. This polynomial fit was determined using Excel.
double Tmb = GetStdTemperature(GeometricAltitude(BaseAlt));
double deltaH = GeoPotAlt - BaseAlt;
double Lmb = LapseRateVector[b];
double FGStandardAtmosphere::GetStdPressure100K(double altitude) const
{
// Limit this equation to input altitudes of 100000 ft.
if (altitude > 100000.0) altitude = 100000.0;
double alt[5];
const double coef[5] = { 2116.217,
-7.648932746E-2,
1.0925498604E-6,
-7.1135726027E-12,
1.7470331356E-17 };
alt[0] = 1;
for (int pwr=1; pwr<=4; pwr++) alt[pwr] = alt[pwr-1]*altitude;
double press = 0.0;
for (int ctr=0; ctr<=4; ctr++) press += coef[ctr]*alt[ctr];
return press;
if (Lmb != 0.0) {
double Exp = g0*Mair / (Rstar*Lmb);
double factor = Tmb/(Tmb + Lmb*deltaH);
return StdPressureBreakpointVector[b]*pow(factor, Exp);
} else
return StdPressureBreakpointVector[b]*exp(-g0*Mair*deltaH/(Rstar*Tmb));
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@ -343,7 +352,7 @@ void FGStandardAtmosphere::SetTemperatureGradedDelta(double deltemp, double h, e
if (unit == eCelsius || unit == eKelvin)
deltemp *= 1.80; // If temp delta "t" is given in metric, scale up to English
TemperatureDeltaGradient = deltemp/(GradientFadeoutAltitude - h);
TemperatureDeltaGradient = deltemp/(GradientFadeoutAltitude - GeopotentialAltitude(h));
CalculateLapseRates();
CalculatePressureBreakpoints();
}
@ -376,13 +385,16 @@ void FGStandardAtmosphere::SetTemperatureGradedDelta(double deltemp, double h, e
void FGStandardAtmosphere::CalculateLapseRates()
{
for (unsigned int bh=0; bh<LapseRateVector.size(); bh++)
unsigned int numRows = StdAtmosTemperatureTable.GetNumRows();
LapseRateVector.clear();
for (unsigned int bh=0; bh < numRows-1; bh++)
{
double t0 = (*StdAtmosTemperatureTable)(bh+1,1);
double t1 = (*StdAtmosTemperatureTable)(bh+2,1);
double h0 = (*StdAtmosTemperatureTable)(bh+1,0);
double h1 = (*StdAtmosTemperatureTable)(bh+2,0);
LapseRateVector[bh] = (t1 - t0) / (h1 - h0) + TemperatureDeltaGradient;
double t0 = StdAtmosTemperatureTable(bh+1,1);
double t1 = StdAtmosTemperatureTable(bh+2,1);
double h0 = StdAtmosTemperatureTable(bh+1,0);
double h1 = StdAtmosTemperatureTable(bh+2,0);
LapseRateVector.push_back((t1 - t0) / (h1 - h0) - TemperatureDeltaGradient);
}
}
@ -391,20 +403,20 @@ void FGStandardAtmosphere::CalculateLapseRates()
void FGStandardAtmosphere::CalculatePressureBreakpoints()
{
for (unsigned int b=0; b<PressureBreakpointVector.size()-1; b++) {
double BaseTemp = (*StdAtmosTemperatureTable)(b+1,1);
double BaseAlt = (*StdAtmosTemperatureTable)(b+1,0);
double UpperAlt = (*StdAtmosTemperatureTable)(b+2,0);
double BaseTemp = StdAtmosTemperatureTable(b+1,1);
double BaseAlt = StdAtmosTemperatureTable(b+1,0);
double UpperAlt = StdAtmosTemperatureTable(b+2,0);
double deltaH = UpperAlt - BaseAlt;
double Tmb = BaseTemp
+ TemperatureBias
+ (GradientFadeoutAltitude - BaseAlt)*TemperatureDeltaGradient;
if (LapseRateVector[b] != 0.00) {
double Lmb = LapseRateVector[b];
double Exp = Mair/(Rstar*Lmb);
double Exp = g0*Mair / (Rstar*Lmb);
double factor = Tmb/(Tmb + Lmb*deltaH);
PressureBreakpointVector[b+1] = PressureBreakpointVector[b]*pow(factor, Exp);
} else {
PressureBreakpointVector[b+1] = PressureBreakpointVector[b]*exp(-Mair*deltaH/(Rstar*Tmb));
PressureBreakpointVector[b+1] = PressureBreakpointVector[b]*exp(-g0*Mair*deltaH/(Rstar*Tmb));
}
}
}
@ -428,6 +440,85 @@ void FGStandardAtmosphere::ResetSLPressure()
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
void FGStandardAtmosphere::CalculateStdDensityBreakpoints()
{
StdDensityBreakpointVector.clear();
for (unsigned int i = 0; i < StdPressureBreakpointVector.size(); i++) {
StdDensityBreakpointVector.push_back(StdPressureBreakpointVector[i] / (Reng * StdAtmosTemperatureTable(i + 1, 1)));
}
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
double FGStandardAtmosphere::CalculateDensityAltitude(double density, double geometricAlt)
{
// Work out which layer we're dealing with
unsigned int b = 0;
for (; b < StdDensityBreakpointVector.size() - 2; b++) {
if (density >= StdDensityBreakpointVector[b + 1])
break;
}
// Get layer properties
double Tmb = StdAtmosTemperatureTable(b + 1, 1);
double Hb = StdAtmosTemperatureTable(b + 1, 0);
double UpperTemp = StdAtmosTemperatureTable(b + 2, 1);
double UpperAlt = StdAtmosTemperatureTable(b + 2, 0);
double deltaH = UpperAlt - Hb;
double Lmb = (UpperTemp - Tmb) / deltaH;
double pb = StdDensityBreakpointVector[b];
double density_altitude = 0.0;
// https://en.wikipedia.org/wiki/Barometric_formula for density solved for H
if (Lmb != 0.0) {
double Exp = -1.0 / (1.0 + (g0*Mair)/(Rstar*Lmb));
density_altitude = Hb + (Tmb / Lmb) * (pow(density / pb, Exp) - 1);
} else {
double Factor = -(Rstar*Tmb) / (g0*Mair);
density_altitude = Hb + Factor * log(density / pb);
}
return GeometricAltitude(density_altitude);
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
double FGStandardAtmosphere::CalculatePressureAltitude(double pressure, double geometricAlt)
{
// Work out which layer we're dealing with
unsigned int b = 0;
for (; b < StdPressureBreakpointVector.size() - 2; b++) {
if (pressure >= StdPressureBreakpointVector[b + 1])
break;
}
// Get layer properties
double Tmb = StdAtmosTemperatureTable(b + 1, 1);
double Hb = StdAtmosTemperatureTable(b + 1, 0);
double UpperTemp = StdAtmosTemperatureTable(b + 2, 1);
double UpperAlt = StdAtmosTemperatureTable(b + 2, 0);
double deltaH = UpperAlt - Hb;
double Lmb = (UpperTemp - Tmb) / deltaH;
double Pb = StdPressureBreakpointVector[b];
double pressure_altitude = 0.0;
if (Lmb != 0.00) {
// Equation 33(a) from ISA document solved for H
double Exp = -(Rstar*Lmb) / (g0*Mair);
pressure_altitude = Hb + (Tmb / Lmb) * (pow(pressure / Pb, Exp) - 1);
} else {
// Equation 33(b) from ISA document solved for H
double Factor = -(Rstar*Tmb) / (g0*Mair);
pressure_altitude = Hb + Factor * log(pressure / Pb);
}
return GeometricAltitude(pressure_altitude);
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
void FGStandardAtmosphere::bind(void)
{
typedef double (FGStandardAtmosphere::*PMFi)(int) const;

41
src/FDM/JSBSim/models/atmosphere/FGStandardAtmosphere.h
View file

@ -217,9 +217,6 @@ public:
/// Returns the pressure at a specified altitude in psf.
virtual double GetPressure(double altitude) const;
/// Returns the standard pressure at a specified altitude in psf
virtual double GetStdPressure100K(double altitude) const;
/// Returns the standard pressure at the specified altitude.
virtual double GetStdPressure(double altitude) const;
@ -253,9 +250,11 @@ protected:
double TemperatureDeltaGradient;
double GradientFadeoutAltitude;
FGTable* StdAtmosTemperatureTable;
FGTable StdAtmosTemperatureTable;
std::vector<double> LapseRateVector;
std::vector<double> PressureBreakpointVector;
std::vector<double> StdPressureBreakpointVector;
std::vector<double> StdDensityBreakpointVector;
/// Recalculate the lapse rate vectors when the temperature profile is altered
/// in a way that would change the lapse rates, such as when a gradient is applied.
@ -266,8 +265,42 @@ protected:
/// altitudes in the standard temperature table.
void CalculatePressureBreakpoints();
/// Calculate the atmospheric density breakpoints at the
/// altitudes in the standard temperature table.
void CalculateStdDensityBreakpoints();
/// Convert a geometric altitude to a geopotential altitude
double GeopotentialAltitude(double geometalt) const { return (geometalt * EarthRadius) / (EarthRadius + geometalt); }
/// Convert a geopotential altitude to a geometric altitude
double GeometricAltitude(double geopotalt) const { return (geopotalt * EarthRadius) / (EarthRadius - geopotalt); }
/** Calculates the density altitude given any temperature or pressure bias.
Calculated density for the specified geometric altitude given any temperature
or pressure biases is passed in.
@param density
@param geometricAlt
@see
https://en.wikipedia.org/wiki/Density_altitude
https://wahiduddin.net/calc/density_altitude.htm
*/
virtual double CalculateDensityAltitude(double density, double geometricAlt);
/** Calculates the pressure altitude given any temperature or pressure bias.
Calculated density for the specified geometric altitude given any temperature
or pressure biases is passed in.
@param pressure
@param geometricAlt
@see
https://en.wikipedia.org/wiki/Pressure_altitude
*/
virtual double CalculatePressureAltitude(double pressure, double geometricAlt);
virtual void bind(void);
void Debug(int from);
/// Earth radius in ft as defined for ISA 1976
static const double EarthRadius;
};
} // namespace JSBSim

4
src/FDM/JSBSim/models/flight_control/FGDeadBand.h
View file

@ -43,7 +43,7 @@ INCLUDES
DEFINITIONS
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#define ID_DEADBAND "$Id: FGDeadBand.h,v 1.10 2013/01/26 17:06:50 bcoconni Exp $"
#define ID_DEADBAND "$Id$"
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FORWARD DECLARATIONS
@ -79,7 +79,7 @@ CLASS DOCUMENTATION
produce no output. For example, say that the width value is 2.0. If the
input is between -1.0 and +1.0, the output will be zero.
@author Jon S. Berndt
@version $Id: FGDeadBand.h,v 1.10 2013/01/26 17:06:50 bcoconni Exp $
@version $Id$
*/
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

4
src/FDM/JSBSim/models/flight_control/FGGain.h
View file

@ -44,7 +44,7 @@ INCLUDES
DEFINITIONS
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#define ID_GAIN "$Id: FGGain.h,v 1.15 2013/01/26 17:06:50 bcoconni Exp $"
#define ID_GAIN "$Id$"
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FORWARD DECLARATIONS
@ -208,7 +208,7 @@ CLASS DOCUMENTATION
@endcode
@author Jon S. Berndt
@version $Revision: 1.15 $
@version $Revision$
*/
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

10
src/FDM/JSBSim/models/propulsion/FGPropeller.h
View file

@ -64,6 +64,7 @@ CLASS DOCUMENTATION
~~~{.xml}
<sense> {1 | -1} </sense>
<p_factor> {number} </p_factor>
<propeller name="{string}" version="{string}">
<ixx> {number} </ixx>
<diameter unit="IN"> {number} </diameter>
@ -75,7 +76,6 @@ CLASS DOCUMENTATION
<maxrpm> {number} </maxrpm>
<constspeed> {number} </constspeed>
<reversepitch> {number} </reversepitch>
<p_factor> {number} </p_factor>
<ct_factor> {number} </ct_factor>
<cp_factor> {number} </cp_factor>
@ -122,7 +122,8 @@ CLASS DOCUMENTATION
\<sense> - Direction of rotation (1=clockwise as viewed from cockpit,
-1=anti-clockwise as viewed from cockpit). Sense is
specified in the parent tag of the propeller.
\<p_factor> - P factor.
\<p_factor> - P factor. It is specified in the parent tag of
the propeller.
\<ct_factor> - A multiplier for the coefficients of thrust.
\<cp_factor> - A multiplier for the coefficients of power.
</pre>
@ -133,6 +134,11 @@ coefficient of power (Cp).
Two tables are optional. They apply a factor to Ct and Cp based on the
helical tip Mach.
The parameters <sense> and <p_factor> must be specified at the parent level i.e.
in the <thruster> element. This allows to specify different sense and P factor
values for each propeller of the model while using the same definition file for
all the propellers.
In addition to thrust, the propeller applies two moments to the aircraft:
- The torque that tends to roll the aircraft in the direction opposite to the
propeller rotation,