214 lines
6.6 KiB
C++
214 lines
6.6 KiB
C++
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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Module: FGEngine.cpp
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Author: Jon Berndt
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Date started: 01/21/99
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Called by: FGAircraft
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------------- Copyright (C) 1999 Jon S. Berndt (jsb@hal-pc.org) -------------
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place - Suite 330, Boston, MA 02111-1307, USA.
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Further information about the GNU General Public License can also be found on
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the world wide web at http://www.gnu.org.
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FUNCTIONAL DESCRIPTION
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--------------------------------------------------------------------------------
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See header file.
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HISTORY
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--------------------------------------------------------------------------------
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01/21/99 JSB Created
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09/03/99 JSB Changed Rocket thrust equation to correct -= Thrust instead of
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+= Thrust (thanks to Tony Peden)
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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INCLUDES
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
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#ifdef FGFS
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# include <simgear/compiler.h>
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# ifdef SG_HAVE_STD_INCLUDES
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# include <fstream>
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# else
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# include <fstream.h>
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# endif
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#else
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# if defined(sgi) && !defined(__GNUC__)
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# include <fstream.h>
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# else
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# include <fstream>
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# endif
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#endif
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#include "FGEngine.h"
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#include "FGTank.h"
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static const char *IdSrc = "$Id$";
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static const char *IdHdr = ID_ENGINE;
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/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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CLASS IMPLEMENTATION
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
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FGEngine::FGEngine(FGFDMExec* exec)
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: Name(""),
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Type(etUnknown),
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X(0), Y(0), Z(0),
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EnginePitch(0), EngineYaw(0),
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SLFuelFlowMax(0), SLOxiFlowMax(0),
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MaxThrottle(1.0), MinThrottle(0.0),
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Thrust(0.0),
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Throttle(0.0),
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Mixture(1.0),
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Magnetos(0),
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Starter(false),
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FuelNeed(0.0), OxidizerNeed(0.0),
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Starved(false), Flameout(false), Running(false), Cranking(false),
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PctPower(0.0),
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EngineNumber(-1),
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TrimMode(false),
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FuelFlow_gph(0.0),
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ManifoldPressure_inHg(0.0),
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ExhaustGasTemp_degK(0.0),
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CylinderHeadTemp_degK(0.0),
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OilPressure_psi(0.0),
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OilTemp_degK(0.0),
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FDMExec(exec),
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State(FDMExec->GetState()),
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Atmosphere(FDMExec->GetAtmosphere()),
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FCS(FDMExec->GetFCS()),
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Propulsion(FDMExec->GetPropulsion()),
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Aircraft(FDMExec->GetAircraft()),
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Translation(FDMExec->GetTranslation()),
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Rotation(FDMExec->GetRotation()),
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Position(FDMExec->GetPosition()),
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Auxiliary(FDMExec->GetAuxiliary()),
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Output(FDMExec->GetOutput())
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{
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Debug(0);
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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FGEngine::~FGEngine()
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{
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Debug(1);
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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// This base class function should be called from within the
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// derived class' Calculate() function before any other calculations are done.
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// This base class method removes fuel from the fuel tanks as appropriate,
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// and sets the starved flag if necessary.
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void FGEngine::ConsumeFuel(void)
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{
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double Fshortage, Oshortage;
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FGTank* Tank;
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if (TrimMode) return;
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Fshortage = Oshortage = 0.0;
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for (unsigned int i=0; i<SourceTanks.size(); i++) {
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Tank = Propulsion->GetTank(i);
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if (Tank->GetType() == FGTank::ttFUEL) {
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Fshortage += Tank->Reduce(CalcFuelNeed()/Propulsion->GetnumSelectedFuelTanks());
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} else {
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Oshortage += Tank->Reduce(CalcOxidizerNeed()/Propulsion->GetnumSelectedOxiTanks());
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}
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}
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if (Fshortage < 0.00 || Oshortage < 0.00) Starved = true;
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else Starved = false;
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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double FGEngine::CalcFuelNeed(void) {
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FuelNeed = SLFuelFlowMax*PctPower*State->Getdt()*Propulsion->GetRate();
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return FuelNeed;
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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double FGEngine::CalcOxidizerNeed(void) {
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OxidizerNeed = SLOxiFlowMax*PctPower*State->Getdt()*Propulsion->GetRate();
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return OxidizerNeed;
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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void FGEngine::SetPlacement(double x, double y, double z, double pitch, double yaw) {
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X = x;
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Y = y;
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Z = z;
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EnginePitch = pitch;
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EngineYaw = yaw;
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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void FGEngine::AddFeedTank(int tkID)
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{
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SourceTanks.push_back(tkID);
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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// The bitmasked value choices are as follows:
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// unset: In this case (the default) JSBSim would only print
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// out the normally expected messages, essentially echoing
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// the config files as they are read. If the environment
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// variable is not set, debug_lvl is set to 1 internally
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// 0: This requests JSBSim not to output any messages
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// whatsoever.
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// 1: This value explicity requests the normal JSBSim
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// startup messages
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// 2: This value asks for a message to be printed out when
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// a class is instantiated
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// 4: When this value is set, a message is displayed when a
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// FGModel object executes its Run() method
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// 8: When this value is set, various runtime state variables
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// are printed out periodically
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// 16: When set various parameters are sanity checked and
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// a message is printed out when they go out of bounds
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void FGEngine::Debug(int from)
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{
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if (debug_lvl <= 0) return;
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if (debug_lvl & 1) { // Standard console startup message output
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if (from == 0) { // Constructor
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}
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}
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if (debug_lvl & 2 ) { // Instantiation/Destruction notification
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if (from == 0) cout << "Instantiated: FGEngine" << endl;
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if (from == 1) cout << "Destroyed: FGEngine" << endl;
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}
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if (debug_lvl & 4 ) { // Run() method entry print for FGModel-derived objects
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}
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if (debug_lvl & 8 ) { // Runtime state variables
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}
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if (debug_lvl & 16) { // Sanity checking
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}
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if (debug_lvl & 64) {
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if (from == 0) { // Constructor
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cout << IdSrc << endl;
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cout << IdHdr << endl;
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}
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}
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}
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