INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
-#include "FGDefs.h"
+#include <sstream>
+
#include "FGRocket.h"
+namespace JSBSim {
+
static const char *IdSrc = "$Id$";
static const char *IdHdr = ID_ROCKET;
-extern short debug_lvl;
-
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS IMPLEMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
-FGRocket::FGRocket(FGFDMExec* exec, FGConfigFile* Eng_cfg) : FGEngine(exec)
+FGRocket::FGRocket(FGFDMExec* exec, FGConfigFile* Eng_cfg, int engine_number)
+ : FGEngine(exec, engine_number)
{
string token;
Name = Eng_cfg->GetValue("NAME");
Eng_cfg->GetNextConfigLine();
- while (Eng_cfg->GetValue() != "/FG_ROCKET") {
+ while (Eng_cfg->GetValue() != string("/FG_ROCKET")) {
*Eng_cfg >> token;
if (token == "SHR") *Eng_cfg >> SHR;
else if (token == "MAX_PC") *Eng_cfg >> maxPC;
else cerr << "Unhandled token in Engine config file: " << token << endl;
}
- if (debug_lvl > 0) {
- cout << " Engine Name: " << Name << endl;
- cout << " Specific Heat Ratio = " << SHR << endl;
- cout << " Maximum Chamber Pressure = " << maxPC << endl;
- cout << " Propulsive Efficiency = " << propEff << endl;
- cout << " MaxThrottle = " << MaxThrottle << endl;
- cout << " MinThrottle = " << MinThrottle << endl;
- cout << " FuelFlowMax = " << SLFuelFlowMax << endl;
- cout << " OxiFlowMax = " << SLOxiFlowMax << endl;
- cout << " Variance = " << Variance << endl;
- }
+ Debug(0);
- EngineNumber = 0;
Type = etRocket;
+ Flameout = false;
PC = 0.0;
kFactor = (2.0*SHR*SHR/(SHR-1.0))*pow(2.0/(SHR+1), (SHR+1)/(SHR-1));
-
- if (debug_lvl & 2) cout << "Instantiated: FGRocket" << endl;
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-FGRocket::~FGRocket()
+FGRocket::~FGRocket(void)
{
- if (debug_lvl & 2) cout << "Destroyed: FGRocket" << endl;
+ Debug(1);
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-float FGRocket::Calculate(float pe)
+double FGRocket::Calculate(void)
{
- float Cf;
+ double Cf=0;
- ConsumeFuel();
+ if (!Flameout && !Starved) ConsumeFuel();
Throttle = FCS->GetThrottlePos(EngineNumber);
PC = 0.0;
} else {
PctPower = Throttle / MaxThrottle;
- PC = maxPC*PctPower * (1.0 + Variance * ((float)rand()/(float)RAND_MAX - 0.5));
- Cf = sqrt(kFactor*(1 - pow(pe/(PC), (SHR-1)/SHR)));
+ PC = maxPC*PctPower * (1.0 + Variance * ((double)rand()/(double)RAND_MAX - 0.5));
+ // The Cf (below) is CF from Eqn. 3-30, "Rocket Propulsion Elements", Fifth Edition,
+ // George P. Sutton. Note that the thruster function GetPowerRequired() might
+ // be better called GetResistance() or something; this function returns the
+ // nozzle exit pressure.
+ Cf = sqrt(kFactor*(1 - pow(Thruster->GetPowerRequired()/(PC), (SHR-1)/SHR)));
Flameout = false;
}
- return Cf*maxPC*PctPower*propEff;
+ return Thrust = Thruster->Calculate(Cf*maxPC*PctPower*propEff);
+}
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+string FGRocket::GetEngineLabels(string delimeter)
+{
+ std::ostringstream buf;
+
+ buf << Name << "_ChamberPress[" << EngineNumber << "]" << delimeter
+ << Thruster->GetThrusterLabels(EngineNumber, delimeter);
+
+ return buf.str();
}
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-void FGRocket::Debug(void)
+string FGRocket::GetEngineValues(string delimeter)
{
- //TODO: Add your source code here
+ std::ostringstream buf;
+
+ buf << PC << delimeter << Thruster->GetThrusterValues(EngineNumber, delimeter);
+
+ return buf.str();
}
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+// The bitmasked value choices are as follows:
+// unset: In this case (the default) JSBSim would only print
+// out the normally expected messages, essentially echoing
+// the config files as they are read. If the environment
+// variable is not set, debug_lvl is set to 1 internally
+// 0: This requests JSBSim not to output any messages
+// whatsoever.
+// 1: This value explicity requests the normal JSBSim
+// startup messages
+// 2: This value asks for a message to be printed out when
+// a class is instantiated
+// 4: When this value is set, a message is displayed when a
+// FGModel object executes its Run() method
+// 8: When this value is set, various runtime state variables
+// are printed out periodically
+// 16: When set various parameters are sanity checked and
+// a message is printed out when they go out of bounds
+
+void FGRocket::Debug(int from)
+{
+ if (debug_lvl <= 0) return;
+
+ if (debug_lvl & 1) { // Standard console startup message output
+ if (from == 0) { // Constructor
+ cout << " Engine Name: " << Name << endl;
+ cout << " Specific Heat Ratio = " << SHR << endl;
+ cout << " Maximum Chamber Pressure = " << maxPC << endl;
+ cout << " Propulsive Efficiency = " << propEff << endl;
+ cout << " MaxThrottle = " << MaxThrottle << endl;
+ cout << " MinThrottle = " << MinThrottle << endl;
+ cout << " FuelFlowMax = " << SLFuelFlowMax << endl;
+ cout << " OxiFlowMax = " << SLOxiFlowMax << endl;
+ cout << " Variance = " << Variance << endl;
+ }
+ }
+ if (debug_lvl & 2 ) { // Instantiation/Destruction notification
+ if (from == 0) cout << "Instantiated: FGRocket" << endl;
+ if (from == 1) cout << "Destroyed: FGRocket" << endl;
+ }
+ if (debug_lvl & 4 ) { // Run() method entry print for FGModel-derived objects
+ }
+ if (debug_lvl & 8 ) { // Runtime state variables
+ }
+ if (debug_lvl & 16) { // Sanity checking
+ }
+ if (debug_lvl & 64) {
+ if (from == 0) { // Constructor
+ cout << IdSrc << endl;
+ cout << IdHdr << endl;
+ }
+ }
+}
+}
projects / flightgear.git / blobdiff