FGEngine.h

/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 Header:       FGEngine.h
 Author:       Jon S. Berndt
 Date started: 01/21/99
 
 ------------- Copyright (C) 1999  Jon S. Berndt (jon@jsbsim.org) -------------
 
 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
--------------------------------------------------------------------------------
 
Based on Flightgear code, which is based on LaRCSim. This class simulates
a generic engine.
 
HISTORY
--------------------------------------------------------------------------------
01/21/99   JSB   Created
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
SENTRY
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
#ifndef FGENGINE_H
#define FGENGINE_H
 
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
#include <vector>
#include <string>
 
#include "math/FGModelFunctions.h"
#include "math/FGColumnVector3.h"
 
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FORWARD DECLARATIONS
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
namespace JSBSim {
 
class FGFDMExec;
class FGThruster;
class Element;
class FGPropertyManager;
 
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS DOCUMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS DECLARATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
class FGEngine : public FGModelFunctions
{
public:
  struct Inputs {
    double Pressure;
    double PressureRatio;
    double Temperature;
    double Density;
    double DensityRatio;
    double Soundspeed;
    double TotalPressure;
    double TAT_c;
    double Vt;
    double Vc;
    double qbar;
    double alpha;
    double beta;
    double H_agl;
    FGColumnVector3 AeroUVW;
    FGColumnVector3 AeroPQR;
    FGColumnVector3 PQRi;
    std::vector <double> ThrottleCmd;
    std::vector <double> MixtureCmd;
    std::vector <double> ThrottlePos;
    std::vector <double> MixturePos;
    std::vector <double> PropAdvance;
    std::vector <bool> PropFeather;
    double TotalDeltaT;
  };
 
  FGEngine(int engine_number, struct Inputs& input);
  ~FGEngine() override;
 
  enum EngineType {etUnknown, etRocket, etPiston, etTurbine, etTurboprop, etElectric};
 
  EngineType GetType(void) const { return Type; }
  virtual const std::string&  GetName(void) const { return Name; }
 
  // Engine controls
  virtual double  GetThrottleMin(void) const { return MinThrottle; }
  virtual double  GetThrottleMax(void) const { return MaxThrottle; }
  virtual bool    GetStarter(void) const     { return Starter; }
 
  virtual double getFuelFlow_gph () const {return FuelFlow_gph;}
  virtual double getFuelFlow_pph () const {return FuelFlow_pph;}
  virtual double GetFuelFlowRate(void) const {return FuelFlowRate;}
  virtual double GetFuelFlowRateGPH(void) const {return FuelFlowRate*3600/FuelDensity;}
  virtual double GetFuelUsedLbs(void) const {return FuelUsedLbs;}
  virtual bool   GetStarved(void) const { return Starved; }
  virtual bool   GetRunning(void) const { return Running; }
  virtual bool   GetCranking(void) const { return Cranking; }
 
  virtual void SetStarved(bool tt) { Starved = tt; }
  virtual void SetStarved(void)    { Starved = true; }
 
  virtual void SetRunning(bool bb) { Running=bb; }
  virtual void SetName(const std::string& name) { Name = name; }
  virtual void SetFuelFreeze(bool f) { FuelFreeze = f; }
  virtual void SetFuelDensity(double d) { FuelDensity = d; }
 
  virtual void SetStarter(bool s) { Starter = s; }
 
  virtual int InitRunning(void){ return 1; }
 
  virtual void ResetToIC(void);
 
  virtual void Calculate(void) = 0;
 
  virtual double GetThrust(void) const;
    
  virtual double CalcFuelNeed(void);
 
  virtual double CalcOxidizerNeed(void) {return 0.0;}
 
  virtual double GetPowerAvailable(void) const {return 0.0;};
 
  virtual const FGColumnVector3& GetBodyForces(void);
  virtual const FGColumnVector3& GetMoments(void);
 
  void LoadThruster(FGFDMExec* exec, Element *el);
  FGThruster* GetThruster(void) const {return Thruster;}
 
  unsigned int GetSourceTank(unsigned int i) const;
  size_t GetNumSourceTanks() const {return SourceTanks.size();}
 
  virtual std::string GetEngineLabels(const std::string& delimiter) = 0;
  virtual std::string GetEngineValues(const std::string& delimiter) = 0;
 
  struct Inputs& in;
  void LoadThrusterInputs();
 
protected:
 
  std::string Name;
  const int   EngineNumber;
  EngineType Type;
  double SLFuelFlowMax;
  double MaxThrottle;
  double MinThrottle;
 
  double FuelExpended;
  double FuelFlowRate;
  double PctPower;
  bool  Starter;
  bool  Starved;
  bool  Running;
  bool  Cranking;
  bool  FuelFreeze;
 
  double FuelFlow_gph;
  double FuelFlow_pph;
  double FuelUsedLbs;
  double FuelDensity;
 
  FGThruster* Thruster;
 
  std::vector <int> SourceTanks;
 
  bool Load(FGFDMExec *exec, Element *el);
  void Debug(int from);
};
}
 
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
#endif