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Sync with JSBSim again: remove a lot of unused trimming code

This commit is contained in:
Erik Hofman 2015-12-15 09:47:08 +01:00
parent ff33aa038e
commit 64b80b4dab
9 changed files with 55 additions and 126 deletions

View file

@ -45,6 +45,7 @@ INCLUDES
#include <iostream>
#include <iterator>
#include <cstdlib>
#include <iomanip>
#include "FGFDMExec.h"
#include "models/atmosphere/FGStandardAtmosphere.h"
@ -64,8 +65,6 @@ INCLUDES
#include "models/FGInput.h"
#include "models/FGOutput.h"
#include "initialization/FGTrim.h"
#include "initialization/FGSimplexTrim.h"
#include "initialization/FGLinearization.h"
#include "input_output/FGScript.h"
#include "input_output/FGXMLFileRead.h"
@ -73,7 +72,7 @@ using namespace std;
namespace JSBSim {
IDENT(IdSrc,"$Id: FGFDMExec.cpp,v 1.182 2015/11/24 13:06:24 ehofman Exp $");
IDENT(IdSrc,"$Id: FGFDMExec.cpp,v 1.185 2015/12/13 08:01:50 bcoconni Exp $");
IDENT(IdHdr,ID_FDMEXEC);
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@ -100,6 +99,7 @@ FGFDMExec::FGFDMExec(FGPropertyManager* root, unsigned int* fdmctr) : Root(root)
Terminate = false;
StandAlone = false;
ResetMode = 0;
RandomSeed = 0;
IncrementThenHolding = false; // increment then hold is off by default
TimeStepsUntilHold = -1;
@ -152,7 +152,7 @@ FGFDMExec::FGFDMExec(FGPropertyManager* root, unsigned int* fdmctr) : Root(root)
// this is to catch errors in binding member functions to the property tree.
try {
Allocate();
} catch ( string msg ) {
} catch (const string& msg ) {
cout << "Caught error: " << msg << endl;
exit(1);
}
@ -163,13 +163,10 @@ FGFDMExec::FGFDMExec(FGPropertyManager* root, unsigned int* fdmctr) : Root(root)
Constructing = true;
typedef int (FGFDMExec::*iPMF)(void) const;
// instance->Tie("simulation/do_trim_analysis", this, (iPMF)0, &FGFDMExec::DoTrimAnalysis, false);
instance->Tie("simulation/do_simple_trim", this, (iPMF)0, &FGFDMExec::DoTrim, false);
instance->Tie("simulation/do_simplex_trim", this, (iPMF)0, &FGFDMExec::DoSimplexTrim);
instance->Tie("simulation/do_linearization", this, (iPMF)0, &FGFDMExec::DoLinearization);
instance->Tie("simulation/reset", this, (iPMF)0, &FGFDMExec::ResetToInitialConditions, false);
instance->Tie("simulation/disperse", this, &FGFDMExec::GetDisperse);
instance->Tie("simulation/randomseed", this, (iPMF)0, &FGFDMExec::SRand, false);
instance->Tie("simulation/randomseed", this, (iPMF)&FGFDMExec::SRand, &FGFDMExec::SRand, false);
instance->Tie("simulation/terminate", (int *)&Terminate);
instance->Tie("simulation/sim-time-sec", this, &FGFDMExec::GetSimTime);
instance->Tie("simulation/dt", this, &FGFDMExec::GetDeltaT);
@ -177,48 +174,6 @@ FGFDMExec::FGFDMExec(FGPropertyManager* root, unsigned int* fdmctr) : Root(root)
instance->Tie("simulation/frame", (int *)&Frame, false);
instance->Tie("simulation/trim-completed", (int *)&trim_completed, false);
// simplex trim properties
instanceRoot->SetDouble("trim/solver/rtol",0.0001);
instanceRoot->SetDouble("trim/solver/speed",2);
instanceRoot->SetDouble("trim/solver/abstol",0.001);
instanceRoot->SetDouble("trim/solver/iterMax",2000);
instanceRoot->SetInt("trim/solver/debugLevel",0);
instanceRoot->SetDouble("trim/solver/random",0);
instanceRoot->SetBool("trim/solver/showSimplex",false);
instanceRoot->SetBool("trim/solver/showConvergence",false);
instanceRoot->SetBool("trim/solver/pause",false);
instanceRoot->SetBool("trim/solver/variablePropPitch",false);
instanceRoot->SetDouble("trim/solver/throttleGuess",0.50);
instanceRoot->SetDouble("trim/solver/throttleMin",0.0);
instanceRoot->SetDouble("trim/solver/throttleMax",1.0);
instanceRoot->SetDouble("trim/solver/throttleStep",0.1);
instanceRoot->SetDouble("trim/solver/aileronGuess",0);
instanceRoot->SetDouble("trim/solver/aileronMin",-1.00);
instanceRoot->SetDouble("trim/solver/aileronMax",1.00);
instanceRoot->SetDouble("trim/solver/aileronStep",0.1);
instanceRoot->SetDouble("trim/solver/rudderGuess",0);
instanceRoot->SetDouble("trim/solver/rudderMin",-1.00);
instanceRoot->SetDouble("trim/solver/rudderMax",1.00);
instanceRoot->SetDouble("trim/solver/rudderStep",0.1);
instanceRoot->SetDouble("trim/solver/elevatorGuess",-0.1);
instanceRoot->SetDouble("trim/solver/elevatorMin",-1.0);
instanceRoot->SetDouble("trim/solver/elevatorMax",1.0);
instanceRoot->SetDouble("trim/solver/elevatorStep",0.1);
instanceRoot->SetDouble("trim/solver/alphaGuess",0.05);
instanceRoot->SetDouble("trim/solver/alphaMin",-0.1);
instanceRoot->SetDouble("trim/solver/alphaMax",.18);
instanceRoot->SetDouble("trim/solver/alphaStep",0.05);
instanceRoot->SetDouble("trim/solver/betaGuess",0);
instanceRoot->SetDouble("trim/solver/betaMin",-0.1);
instanceRoot->SetDouble("trim/solver/betaMax",0.1);
instanceRoot->SetDouble("trim/solver/betaStep",0.0001);
Constructing = false;
}
@ -243,7 +198,7 @@ FGFDMExec::~FGFDMExec()
FDMctr = 0;
}
}
} catch ( string msg ) {
} catch (const string& msg ) {
cout << "Caught error: " << msg << endl;
}
@ -614,14 +569,14 @@ bool FGFDMExec::RunIC(void)
cout << endl << fgblue << highint
<< "End of vehicle configuration loading." << endl
<< "-------------------------------------------------------------------------------"
<< reset << setprecision(6) << endl;
<< reset << std::setprecision(6) << endl;
}
for (unsigned int n=0; n < propulsion->GetNumEngines(); ++n) {
if (IC->IsEngineRunning(n)) {
try {
propulsion->InitRunning(n);
} catch (string str) {
} catch (const string& str) {
cerr << str << endl;
return false;
}
@ -683,7 +638,7 @@ vector <string> FGFDMExec::EnumerateFDMs(void)
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
bool FGFDMExec::LoadScript(const string& script, double deltaT, const string initfile)
bool FGFDMExec::LoadScript(const string& script, double deltaT, const string& initfile)
{
bool result;
@ -709,9 +664,7 @@ bool FGFDMExec::LoadModel(const string& AircraftPath, const string& EnginePath,
bool FGFDMExec::LoadModel(const string& model, bool addModelToPath)
{
string token;
string aircraftCfgFileName;
Element* element = 0L;
bool result = false; // initialize result to false, indicating input file not yet read
modelName = model; // Set the class modelName attribute
@ -743,7 +696,7 @@ bool FGFDMExec::LoadModel(const string& model, bool addModelToPath)
if (IsChild) debug_lvl = saved_debug_lvl;
// Process the fileheader element in the aircraft config file. This element is OPTIONAL.
element = document->FindElement("fileheader");
Element* element = document->FindElement("fileheader");
if (element) {
result = ReadFileHeader(element);
if (!result) {
@ -936,12 +889,11 @@ string FGFDMExec::GetPropulsionTankReport()
void FGFDMExec::BuildPropertyCatalog(struct PropertyCatalogStructure* pcs)
{
struct PropertyCatalogStructure* pcsNew = new struct PropertyCatalogStructure;
int node_idx = 0;
for (int i=0; i<pcs->node->nChildren(); i++) {
string access="";
pcsNew->base_string = pcs->base_string + "/" + pcs->node->getChild(i)->getName();
node_idx = pcs->node->getChild(i)->getIndex();
int node_idx = pcs->node->getChild(i)->getIndex();
if (node_idx != 0) {
pcsNew->base_string = CreateIndexedPropertyName(pcsNew->base_string, node_idx);
}
@ -1091,8 +1043,6 @@ bool FGFDMExec::ReadChild(Element* el)
// Load the model given the aircraft name
// reset debug level to prior setting
string token;
struct childData* child = new childData;
child->exec = new FGFDMExec(Root, FDMctr);
@ -1175,55 +1125,26 @@ void FGFDMExec::DoTrim(int mode)
{
if (Constructing) return;
if (mode < 0 || mode > JSBSim::tNone) {
if (mode < 0 || mode > JSBSim::tNone)
throw("Illegal trimming mode!");
return;
}
FGTrim trim(this, (JSBSim::TrimMode)mode);
if ( !trim.DoTrim() ) {
throw("Trim Failed");
return;
}
bool success = trim.DoTrim();
trim.Report();
if (!success)
throw("Trim Failed");
trim_completed = 1;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
void FGFDMExec::DoSimplexTrim(int mode)
{
double saved_time;
if (Constructing) return;
if (mode < 0 || mode > JSBSim::tNone) {
cerr << endl << "Illegal trimming mode!" << endl << endl;
return;
}
saved_time = sim_time;
FGSimplexTrim trim(this, (JSBSim::TrimMode)mode);
Setsim_time(saved_time);
std::cout << "dT: " << dT << std::endl;
trim_completed = 1;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
void FGFDMExec::DoLinearization(int mode)
{
double saved_time;
if (Constructing) return;
saved_time = sim_time;
FGLinearization lin(this,mode);
Setsim_time(saved_time);
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
void FGFDMExec::SRand(int sr)
{
RandomSeed = sr;
gaussian_random_number_phase = 0;
srand(sr);
srand(RandomSeed);
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

View file

@ -54,7 +54,7 @@ INCLUDES
DEFINITIONS
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#define ID_FDMEXEC "$Id: FGFDMExec.h,v 1.102 2015/10/25 21:18:29 dpculp Exp $"
#define ID_FDMEXEC "$Id: FGFDMExec.h,v 1.104 2015/12/13 07:54:48 bcoconni Exp $"
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FORWARD DECLARATIONS
@ -178,7 +178,7 @@ CLASS DOCUMENTATION
property actually maps toa function call of DoTrim().
@author Jon S. Berndt
@version $Revision: 1.102 $
@version $Revision: 1.104 $
*/
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@ -311,7 +311,7 @@ public:
is not given in either place, an error will result.
@return true if successfully loads; false otherwise. */
bool LoadScript(const std::string& Script, double deltaT=0.0,
const std::string initfile="");
const std::string& initfile="");
/** Sets the path to the engine config file directories.
@param path path to the directory under which engine config
@ -459,12 +459,6 @@ public:
* - tTurn
* - tNone */
void DoTrim(int mode);
void DoSimplexTrim(int mode);
/** Executes linearization with state-space output
* You must trim first to get an accurate state-space model
*/
void DoLinearization(int mode);
/// Disables data logging to all outputs.
void DisableOutput(void) { Output->Disable(); }
@ -596,6 +590,7 @@ private:
bool holding;
bool IncrementThenHolding;
int TimeStepsUntilHold;
int RandomSeed;
bool Constructing;
bool modelLoaded;
bool IsChild;
@ -649,6 +644,7 @@ private:
bool ReadChild(Element*);
bool ReadPrologue(Element*);
void SRand(int sr);
int SRand(void) const {return RandomSeed;}
void LoadInputs(unsigned int idx);
void LoadPlanetConstants(void);
void LoadModelConstants(void);

View file

@ -57,7 +57,7 @@ using namespace std;
namespace JSBSim {
IDENT(IdSrc,"$Id: FGInitialCondition.cpp,v 1.101 2015/09/27 15:45:31 bcoconni Exp $");
IDENT(IdSrc,"$Id: FGInitialCondition.cpp,v 1.102 2015/12/13 08:16:00 bcoconni Exp $");
IDENT(IdHdr,ID_INITIALCONDITION);
//******************************************************************************
@ -897,7 +897,7 @@ bool FGInitialCondition::Load(string rstfile, bool useStoredPath)
// Check to see if any engines are specified to be initialized in a running state
Element* running_elements = document->FindElement("running");
while (running_elements) {
enginesRunning &= 1 << int(running_elements->GetDataAsNumber());
enginesRunning |= 1 << int(running_elements->GetDataAsNumber());
running_elements = document->FindNextElement("running");
}

View file

@ -57,7 +57,7 @@ using namespace std;
namespace JSBSim {
IDENT(IdSrc,"$Id: FGTrim.cpp,v 1.28 2015/09/28 20:50:41 bcoconni Exp $");
IDENT(IdSrc,"$Id: FGTrim.cpp,v 1.29 2015/12/13 08:19:57 bcoconni Exp $");
IDENT(IdHdr,ID_TRIM);
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@ -786,6 +786,7 @@ void FGTrim::setDebug(FGTrimAxis& axis) {
void FGTrim::SetMode(TrimMode tt) {
ClearStates();
fdmex->GetPropagate()->SetInitialState(&fgic);
mode=tt;
switch(tt) {
case tFull:

View file

@ -60,7 +60,7 @@ using namespace std;
namespace JSBSim {
IDENT(IdSrc,"$Id: FGAccelerations.cpp,v 1.24 2015/04/02 18:30:06 ehofman Exp $");
IDENT(IdSrc,"$Id: FGAccelerations.cpp,v 1.25 2015/12/09 04:28:18 jberndt Exp $");
IDENT(IdHdr,ID_ACCELERATIONS);
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@ -157,7 +157,8 @@ void FGAccelerations::CalculatePQRdot(void)
// Compute body frame rotational accelerations based on the current body
// moments and the total inertial angular velocity expressed in the body
// frame.
if (HoldDown && !FDMExec->GetTrimStatus()) {
// if (HoldDown && !FDMExec->GetTrimStatus()) {
if (HoldDown) {
// The rotational acceleration in ECI is calculated so that the rotational
// acceleration is zero in the body frame.
vPQRdot.InitMatrix();

View file

@ -51,7 +51,7 @@ using namespace std;
namespace JSBSim {
IDENT(IdSrc,"$Id: FGMassBalance.cpp,v 1.53 2015/03/28 14:49:02 bcoconni Exp $");
IDENT(IdSrc,"$Id: FGMassBalance.cpp,v 1.54 2015/12/09 04:28:18 jberndt Exp $");
IDENT(IdHdr,ID_MASSBALANCE);
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@ -435,12 +435,14 @@ void FGMassBalance::GetMassPropertiesReport(int i)
<< " Mass Properties Report (English units: lbf, in, slug-ft^2)"
<< reset << endl;
cout << " " << underon << " Weight CG-X CG-Y"
<< " CG-Z Ixx Iyy Izz" << underoff << endl;
<< " CG-Z Ixx Iyy Izz"
<< " Ixy Ixz Iyz" << underoff << endl;
cout.precision(1);
cout << highint << setw(34) << left << " Base Vehicle " << normint
<< right << setw(10) << EmptyWeight << setw(8) << vbaseXYZcg(eX) << setw(8)
<< vbaseXYZcg(eY) << setw(8) << vbaseXYZcg(eZ) << setw(12) << baseJ(1,1)
<< setw(12) << baseJ(2,2) << setw(12) << baseJ(3,3) << endl;
<< right << setw(10) << EmptyWeight
<< setw(8) << vbaseXYZcg(eX) << setw(8) << vbaseXYZcg(eY) << setw(8) << vbaseXYZcg(eZ)
<< setw(12) << baseJ(1,1) << setw(12) << baseJ(2,2) << setw(12) << baseJ(3,3)
<< setw(12) << baseJ(1,2) << setw(12) << baseJ(1,3) << setw(12) << baseJ(2,3) << endl;
for (unsigned int i=0;i<PointMasses.size();i++) {
PointMass* pm = PointMasses[i];
@ -448,13 +450,13 @@ void FGMassBalance::GetMassPropertiesReport(int i)
cout << highint << left << setw(4) << i << setw(30) << pm->GetName() << normint
<< right << setw(10) << pmweight << setw(8) << pm->GetLocation()(eX)
<< setw(8) << pm->GetLocation()(eY) << setw(8) << pm->GetLocation()(eZ)
<< setw(12) << pm->GetPointMassMoI(1,1) << setw(12) << pm->GetPointMassMoI(2,2)
<< setw(12) << pm->GetPointMassMoI(3,3) << endl;
<< setw(12) << pm->GetPointMassMoI(1,1) << setw(12) << pm->GetPointMassMoI(2,2) << setw(12) << pm->GetPointMassMoI(3,3)
<< setw(12) << pm->GetPointMassMoI(1,2) << setw(12) << pm->GetPointMassMoI(1,3) << setw(12) << pm->GetPointMassMoI(2,3) << endl;
}
cout << FDMExec->GetPropulsionTankReport();
cout << underon << setw(104) << " " << underoff << endl;
cout << " " << underon << setw(136) << " " << underoff << endl;
cout << highint << left << setw(30) << " Total: " << right << setw(14) << Weight
<< setw(8) << vXYZcg(eX)
<< setw(8) << vXYZcg(eY)
@ -462,6 +464,9 @@ void FGMassBalance::GetMassPropertiesReport(int i)
<< setw(12) << mJ(1,1)
<< setw(12) << mJ(2,2)
<< setw(12) << mJ(3,3)
<< setw(12) << mJ(1,2)
<< setw(12) << mJ(1,3)
<< setw(12) << mJ(2,3)
<< normint << endl;
cout.setf(ios_base::fixed);

View file

@ -45,7 +45,7 @@ using namespace std;
namespace JSBSim {
IDENT(IdSrc,"$Id: FGPropeller.cpp,v 1.54 2015/09/27 09:29:41 bcoconni Exp $");
IDENT(IdSrc,"$Id: FGPropeller.cpp,v 1.56 2015/12/13 08:56:06 bcoconni Exp $");
IDENT(IdHdr,ID_PROPELLER);
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@ -205,6 +205,9 @@ double FGPropeller::Calculate(double EnginePower)
double Vel = localAeroVel(eU) + Vinduced;
double rho = in.Density;
double RPS = RPM/60.0;
// The time step should not be 0 for the propeller RPM to reach a steady
// value during trimming.
deltaT = ( in.TotalDeltaT > 0.0 ) ? in.TotalDeltaT : 0.01;
// Calculate helical tip Mach
double Area = 0.25*Diameter*Diameter*M_PI;
@ -285,7 +288,7 @@ double FGPropeller::Calculate(double EnginePower)
if (omega > 0.0) ExcessTorque = PowerAvailable / omega;
else ExcessTorque = PowerAvailable / 1.0;
RPM = (RPS + ((ExcessTorque / Ixx) / (2.0 * M_PI)) * in.TotalDeltaT) * 60.0;
RPM = (RPS + ((ExcessTorque / Ixx) / (2.0 * M_PI)) * deltaT) * 60.0;
if (RPM < 0.0) RPM = 0.0; // Engine won't turn backwards
@ -326,7 +329,7 @@ double FGPropeller::GetPowerRequired(void)
double dRPM = rpmReq - RPM;
// The pitch of a variable propeller cannot be changed when the RPMs are
// too low - the oil pump does not work.
if (RPM > 200) Pitch -= dRPM * in.TotalDeltaT;
if (RPM > 200) Pitch -= dRPM * deltaT;
if (Pitch < MinPitch) Pitch = MinPitch;
else if (Pitch > MaxPitch) Pitch = MaxPitch;

View file

@ -45,7 +45,7 @@ INCLUDES
DEFINITIONS
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#define ID_PROPELLER "$Id: FGPropeller.h,v 1.22 2015/04/20 11:40:45 ehofman Exp $"
#define ID_PROPELLER "$Id: FGPropeller.h,v 1.25 2015/12/13 08:56:06 bcoconni Exp $"
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FORWARD DECLARATIONS
@ -142,7 +142,7 @@ CLASS DOCUMENTATION
<li>Various NACA Technical Notes and Reports</li>
</ul>
@author Jon S. Berndt
@version $Id: FGPropeller.h,v 1.22 2015/04/20 11:40:45 ehofman Exp $
@version $Id: FGPropeller.h,v 1.25 2015/12/13 08:56:06 bcoconni Exp $
@see FGEngine
@see FGThruster
*/
@ -303,6 +303,7 @@ private:
bool Reversed; // true, when propeller is reversed
double Reverse_coef; // 0 - 1 defines AdvancePitch (0=MIN_PITCH 1=REVERSE_PITCH)
bool Feathered; // true, if feather command
double deltaT; // Time step
};
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

View file

@ -53,7 +53,7 @@ INCLUDES
DEFINITIONS
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#define ID_TANK "$Id: FGTank.h,v 1.30 2015/02/02 20:49:11 bcoconni Exp $"
#define ID_TANK "$Id: FGTank.h,v 1.31 2015/12/09 04:28:18 jberndt Exp $"
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FORWARD DECLARATIONS
@ -135,6 +135,7 @@ CLASS DOCUMENTATION
</drain_location>
<radius unit="{IN | FT | M}"> {number} </radius>
<capacity unit="{LBS | KG}"> {number} </capacity>
<inertia_factor> {number:0-1} </inertia_factor>
<contents unit="{LBS | KG}"> {number} </contents>
<temperature> {number} </temperature> <!-- must be degrees fahrenheit -->
<standpipe unit="{LBS | KG"}> {number} </standpipe>