1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5 Date started: 04/07/2004
6 Purpose: This module models an electric motor
8 --------- Copyright (C) 2004 David Culp (davidculp2@comcast.net) -------------
10 This program is free software; you can redistribute it and/or modify it under
11 the terms of the GNU General Public License as published by the Free Software
12 Foundation; either version 2 of the License, or (at your option) any later
15 This program is distributed in the hope that it will be useful, but WITHOUT
16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
20 You should have received a copy of the GNU General Public License along with
21 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
22 Place - Suite 330, Boston, MA 02111-1307, USA.
24 Further information about the GNU General Public License can also be found on
25 the world wide web at http://www.gnu.org.
27 FUNCTIONAL DESCRIPTION
28 --------------------------------------------------------------------------------
30 This class descends from the FGEngine class and models an electric motor based on
31 parameters given in the engine config file for this class
34 --------------------------------------------------------------------------------
35 04/07/2004 DPC Created
37 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
39 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
41 #include "FGElectric.h"
42 #include "FGPropulsion.h"
46 static const char *IdSrc = "$Id$";
47 static const char *IdHdr = ID_ELECTRIC;
49 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
51 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
53 FGElectric::FGElectric(FGFDMExec* exec, FGConfigFile* Eng_cfg, int engine_number)
54 : FGEngine(exec, engine_number)
64 Name = Eng_cfg->GetValue("NAME");
65 Eng_cfg->GetNextConfigLine();
66 while (Eng_cfg->GetValue() != string("/FG_ELECTRIC")) {
68 if (token == "POWER_WATTS") *Eng_cfg >> PowerWatts;
69 else cerr << "Unhandled token in Engine config file: " << token << endl;
72 Debug(0); // Call Debug() routine from constructor if needed
75 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
77 FGElectric::~FGElectric()
79 Debug(1); // Call Debug() routine from constructor if needed
82 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
84 double FGElectric::Calculate(void)
86 Throttle = FCS->GetThrottlePos(EngineNumber);
88 RPM = Thruster->GetRPM() * Thruster->GetGearRatio();
90 HP = PowerWatts * Throttle / hptowatts;
92 PowerAvailable = (HP * hptoftlbssec) - Thruster->GetPowerRequired();
94 return Thruster->Calculate(PowerAvailable);
97 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
99 string FGElectric::GetEngineLabels(void)
101 return ""; // currently no labels are returned for this engine
104 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
106 string FGElectric::GetEngineValues(void)
108 return ""; // currently no values are returned for this engine
111 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
113 // The bitmasked value choices are as follows:
114 // unset: In this case (the default) JSBSim would only print
115 // out the normally expected messages, essentially echoing
116 // the config files as they are read. If the environment
117 // variable is not set, debug_lvl is set to 1 internally
118 // 0: This requests JSBSim not to output any messages
120 // 1: This value explicity requests the normal JSBSim
122 // 2: This value asks for a message to be printed out when
123 // a class is instantiated
124 // 4: When this value is set, a message is displayed when a
125 // FGModel object executes its Run() method
126 // 8: When this value is set, various runtime state variables
127 // are printed out periodically
128 // 16: When set various parameters are sanity checked and
129 // a message is printed out when they go out of bounds
131 void FGElectric::Debug(int from)
133 if (debug_lvl <= 0) return;
135 if (debug_lvl & 1) { // Standard console startup message output
136 if (from == 0) { // Constructor
138 cout << "\n Engine Name: " << Name << endl;
139 cout << " Power Watts: " << PowerWatts << endl;
143 if (debug_lvl & 2 ) { // Instantiation/Destruction notification
144 if (from == 0) cout << "Instantiated: FGElectric" << endl;
145 if (from == 1) cout << "Destroyed: FGElectric" << endl;
147 if (debug_lvl & 4 ) { // Run() method entry print for FGModel-derived objects
149 if (debug_lvl & 8 ) { // Runtime state variables
151 if (debug_lvl & 16) { // Sanity checking
153 if (debug_lvl & 64) {
154 if (from == 0) { // Constructor
155 cout << IdSrc << endl;
156 cout << IdHdr << endl;
162 FGElectric::CalcFuelNeed(void)
167 } // namespace JSBSim