JSBSim Flight Dynamics Model 1.3.3 (16 Oct 2026)
An Open Source Flight Dynamics and Control Software Library in C++
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FGTransmission.h
1/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2
3 JSBSim
4 Author: Jon S. Berndt
5 Date started: 08/24/00
6 ------------- Copyright (C) 2000 Jon S. Berndt (jon@jsbsim.org) -------------
7
8 Header: FGTransmission.h
9 Author: T.Kreitler
10 Date started: 02/05/12
11
12 ------------- Copyright (C) 2012 T. Kreitler (t.kreitler@web.de) -------------
13
14 This program is free software; you can redistribute it and/or modify it under
15 the terms of the GNU Lesser General Public License as published by the Free Software
16 Foundation; either version 2 of the License, or (at your option) any later
17 version.
18
19 This program is distributed in the hope that it will be useful, but WITHOUT
20 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
21 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
22 details.
23
24 You should have received a copy of the GNU Lesser General Public License along with
25 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
26 Place - Suite 330, Boston, MA 02111-1307, USA.
27
28 Further information about the GNU Lesser General Public License can also be found on
29 the world wide web at http://www.gnu.org.
30
31HISTORY
32--------------------------------------------------------------------------------
3302/05/12 T.Kreitler Created
34
35%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
36SENTRY
37%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
38
39#ifndef FGTRANSMISSION_H
40#define FGTRANSMISSION_H
41
42/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
43INCLUDES
44%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
45
46#include "FGJSBBase.h"
47#include "FGFDMExec.h"
48#include "input_output/FGPropertyManager.h"
49
50/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
51FORWARD DECLARATIONS
52%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
53
54namespace JSBSim {
55
56/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
57CLASS DOCUMENTATION
58%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
59
104/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
105CLASS DECLARATION
106%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
107
108class FGTransmission : public FGJSBBase {
109
110public:
115 FGTransmission(FGFDMExec *exec, int num, double dt);
116
118 ~FGTransmission();
119
121 void ResetToIC(void);
122
123 void Calculate(double EnginePower, double ThrusterTorque, double dt);
124
125 void SetMaxBrakePower(double x) {MaxBrakePower=x;}
126 double GetMaxBrakePower() const {return MaxBrakePower;}
127 void SetEngineFriction(double x) {EngineFriction=x;}
128 double GetEngineFriction() const {return EngineFriction;}
129 void SetEngineMoment(double x) {EngineMoment=x;}
130 double GetEngineMoment() const {return EngineMoment;}
131 void SetThrusterMoment(double x) {ThrusterMoment=x;}
132 double GetThrusterMoment() const {return ThrusterMoment;}
133
134 double GetFreeWheelTransmission() const {return FreeWheelTransmission;}
135 void SetEngineRPM(double x) {EngineRPM=x;}
136 double GetEngineRPM() {return EngineRPM;}
137 void SetThrusterRPM(double x) {ThrusterRPM=x;}
138 double GetThrusterRPM() {return ThrusterRPM;}
139
140 double GetBrakeCtrlNorm() const {return BrakeCtrlNorm;}
141 void SetBrakeCtrlNorm(double x) {BrakeCtrlNorm=x;}
142 double GetClutchCtrlNorm() const {return ClutchCtrlNorm;}
143 void SetClutchCtrlNorm(double x) {ClutchCtrlNorm=x;}
144
145private:
146 bool BindModel(int num, FGPropertyManager* pm);
148 void InitDynamics(void);
149 void Debug(int from);
150
151 inline double omega_to_rpm(double w) {
152 return w * 9.54929658551372014613302580235; // omega/(2.0*PI) * 60.0
153 }
154 inline double rpm_to_omega(double r) {
155 return r * 0.104719755119659774615421446109; // (rpm/60.0)*2.0*PI
156 }
157
158 Filter FreeWheelLag;
159 double FreeWheelTransmission; // state, 0: free, 1:locked
160
161 double ThrusterMoment;
162 double EngineMoment; // estimated MOI of gear and engine, influences acceleration
163 double EngineFriction; // estimated friction in gear and possibly engine
164
165 double ClutchCtrlNorm;
166 double BrakeCtrlNorm;
167 double MaxBrakePower;
168
169 double EngineRPM;
170 double ThrusterRPM;
171};
172}
173//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
174#endif
JSBSim::FGFDMExec
Encapsulates the JSBSim simulation executive.
Definition FGFDMExec.h:185
JSBSim::FGJSBBase::Filter
First order, (low pass / lag) filter.
Definition FGJSBBase.h:124
JSBSim::FGJSBBase
JSBSim Base class.
Definition FGJSBBase.h:115
JSBSim::FGTransmission
Utility class that handles power transmission in conjunction with FGRotor.
Definition FGTransmission.h:108
JSBSim::FGTransmission::ResetToIC
void ResetToIC(void)
Reset the initial conditions.
Definition FGTransmission.cpp:70
JSBSim::FGTransmission::~FGTransmission
~FGTransmission()
Destructor for FGTransmission.
Definition FGTransmission.cpp:65
JSBSim
Main namespace for the JSBSim Flight Dynamics Model.
Definition FGFDMExec.cpp:73