1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
7 ------------- Copyright (C) 1999 Jon S. Berndt (jsb@hal-pc.org) -------------
9 This program is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free Software
11 Foundation; either version 2 of the License, or (at your option) any later
14 This program is distributed in the hope that it will be useful, but WITHOUT
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
16 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
19 You should have received a copy of the GNU General Public License along with
20 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
21 Place - Suite 330, Boston, MA 02111-1307, USA.
23 Further information about the GNU General Public License can also be found on
24 the world wide web at http://www.gnu.org.
27 --------------------------------------------------------------------------------
30 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
32 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
34 #ifndef FGPROPULSION_H
35 #define FGPROPULSION_H
37 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
39 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
42 # include <simgear/compiler.h>
43 # ifdef SG_HAVE_STD_INCLUDES
48 # include <iterator.h>
59 #include "FGTurboShaft.h"
60 #include "FGTurboJet.h"
61 #include "FGTurboProp.h"
63 #include "FGPropeller.h"
66 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
68 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
70 #define ID_PROPULSION "$Id$"
72 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
74 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
76 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
77 COMMENTS, REFERENCES, and NOTES [use "class documentation" below for API docs]
78 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
80 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
82 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
84 /** Propulsion management class.
85 FGPropulsion manages all aspects of propulsive force generation, including
86 containment of engines, tanks, and thruster class instances in STL vectors,
87 and the interaction and communication between them.
95 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
97 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
99 class FGPropulsion : public FGModel {
101 FGPropulsion(FGFDMExec*);
104 /** Executes the propulsion model.
105 The initial plan for the FGPropulsion class calls for Run() to be executed,
106 performing the following tasks:
108 <li>Determine the drag - or power required - for the attached thrust effector
109 for this engine so that any feedback to the engine can be performed. This
110 is done by calling FGThruster::CalculatePReq()</li>
111 <li>Given 1, above, calculate the power available from the engine. This is
112 done by calling FGEngine::CalculatePAvail()</li>
113 <li>Next, calculate the thrust output from the thruster model given the power
114 available and the power required. This may also result in new performance
115 numbers for the thruster in the case of the propeller, at least. This
116 result is returned from a call to Calculate().</li></ol>
118 [Note: Should we be checking the Starved flag here?] */
121 /** Loads the propulsion system (engine[s], tank[s], thruster[s]).
122 Characteristics of the propulsion system are read in from the config file.
123 @param AC_cfg pointer to the config file instance that describes the
124 aircraft being modeled.
125 @return true if successfully loaded, otherwise false */
126 bool Load(FGConfigFile* AC_cfg);
128 /// Retrieves the number of engines defined for the aircraft.
129 inline unsigned int GetNumEngines(void) {return Engines.size();}
131 /** Retrieves an engine object pointer from the list of engines.
132 @param index the engine index within the vector container
133 @return the address of the specific engine, or zero if no such engine is
135 inline FGEngine* GetEngine(unsigned int index) {
136 if (index <= Engines.size()-1) return Engines[index];
139 // Retrieves the number of tanks defined for the aircraft.
140 inline unsigned int GetNumTanks(void) {return Tanks.size();}
142 /** Retrieves a tank object pointer from the list of tanks.
143 @param index the tank index within the vector container
144 @return the address of the specific tank, or zero if no such tank is
146 inline FGTank* GetTank(unsigned int index) {
147 if (index <= Tanks.size()-1) return Tanks[index];
150 /** Retrieves a thruster object pointer from the list of thrusters.
151 @param index the thruster index within the vector container
152 @return the address of the specific thruster, or zero if no such thruster is
154 inline FGThruster* GetThruster(unsigned int index) {
155 if (index <= Thrusters.size()-1) return Thrusters[index];
158 /** Returns the number of fuel tanks currently actively supplying fuel */
159 inline int GetnumSelectedFuelTanks(void) {return numSelectedFuelTanks;}
161 /** Returns the number of oxidizer tanks currently actively supplying oxidizer */
162 inline int GetnumSelectedOxiTanks(void) {return numSelectedOxiTanks;}
164 /** Loops the engines/thrusters until thrust output steady (used for trimming) */
165 bool GetSteadyState(void);
167 /** starts the engines in IC mode (dt=0). All engine-specific setup must
168 be done before calling this (i.e. magnetos, starter engage, etc.) */
169 bool ICEngineStart(void);
171 string GetPropulsionStrings(void);
172 string GetPropulsionValues(void);
174 inline FGColumnVector3& GetForces(void) {return vForces; }
175 inline double GetForces(int n) { return vForces(n);}
176 inline FGColumnVector3& GetMoments(void) {return vMoments;}
177 inline double GetMoments(int n) {return vMoments(n);}
179 FGColumnVector3& GetTanksCG(void);
180 double GetTanksWeight(void);
182 double GetTanksIxx(const FGColumnVector3& vXYZcg);
183 double GetTanksIyy(const FGColumnVector3& vXYZcg);
184 double GetTanksIzz(const FGColumnVector3& vXYZcg);
185 double GetTanksIxz(const FGColumnVector3& vXYZcg);
186 double GetTanksIxy(const FGColumnVector3& vXYZcg);
189 vector <FGEngine*> Engines;
190 vector <FGTank*> Tanks;
191 vector <FGTank*>::iterator iTank;
192 vector <FGThruster*> Thrusters;
193 unsigned int numSelectedFuelTanks;
194 unsigned int numSelectedOxiTanks;
195 unsigned int numFuelTanks;
196 unsigned int numOxiTanks;
197 unsigned int numEngines;
198 unsigned int numTanks;
199 unsigned int numThrusters;
201 FGColumnVector3 vForces;
202 FGColumnVector3 vMoments;
203 FGColumnVector3 vXYZtank;
204 void Debug(int from);
207 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%