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 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
45 #include "FGElectric.h"
46 #include "FGPropulsion.h"
50 static const char *IdSrc = "$Id$";
51 static const char *IdHdr = ID_ELECTRIC;
53 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
55 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
57 FGElectric::FGElectric(FGFDMExec* exec, FGConfigFile* Eng_cfg, int engine_number)
58 : FGEngine(exec, engine_number)
68 Name = Eng_cfg->GetValue("NAME");
69 Eng_cfg->GetNextConfigLine();
70 while (Eng_cfg->GetValue() != string("/FG_ELECTRIC")) {
72 if (token == "POWER_WATTS") *Eng_cfg >> PowerWatts;
73 else cerr << "Unhandled token in Engine config file: " << token << endl;
76 Debug(0); // Call Debug() routine from constructor if needed
79 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
81 FGElectric::~FGElectric()
83 Debug(1); // Call Debug() routine from constructor if needed
86 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
88 double FGElectric::Calculate(void)
90 Throttle = FCS->GetThrottlePos(EngineNumber);
92 RPM = Thruster->GetRPM() * Thruster->GetGearRatio();
94 HP = PowerWatts * Throttle / hptowatts;
96 PowerAvailable = (HP * hptoftlbssec) - Thruster->GetPowerRequired();
98 return Thrust = Thruster->Calculate(PowerAvailable);
101 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
103 string FGElectric::GetEngineLabels(string delimeter)
105 return ""; // currently no labels are returned for this engine
108 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
110 string FGElectric::GetEngineValues(string delimeter)
112 return ""; // currently no values are returned for this engine
115 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
117 // The bitmasked value choices are as follows:
118 // unset: In this case (the default) JSBSim would only print
119 // out the normally expected messages, essentially echoing
120 // the config files as they are read. If the environment
121 // variable is not set, debug_lvl is set to 1 internally
122 // 0: This requests JSBSim not to output any messages
124 // 1: This value explicity requests the normal JSBSim
126 // 2: This value asks for a message to be printed out when
127 // a class is instantiated
128 // 4: When this value is set, a message is displayed when a
129 // FGModel object executes its Run() method
130 // 8: When this value is set, various runtime state variables
131 // are printed out periodically
132 // 16: When set various parameters are sanity checked and
133 // a message is printed out when they go out of bounds
135 void FGElectric::Debug(int from)
137 if (debug_lvl <= 0) return;
139 if (debug_lvl & 1) { // Standard console startup message output
140 if (from == 0) { // Constructor
142 cout << "\n Engine Name: " << Name << endl;
143 cout << " Power Watts: " << PowerWatts << endl;
147 if (debug_lvl & 2 ) { // Instantiation/Destruction notification
148 if (from == 0) cout << "Instantiated: FGElectric" << endl;
149 if (from == 1) cout << "Destroyed: FGElectric" << endl;
151 if (debug_lvl & 4 ) { // Run() method entry print for FGModel-derived objects
153 if (debug_lvl & 8 ) { // Runtime state variables
155 if (debug_lvl & 16) { // Sanity checking
157 if (debug_lvl & 64) {
158 if (from == 0) { // Constructor
159 cout << IdSrc << endl;
160 cout << IdHdr << endl;
166 FGElectric::CalcFuelNeed(void)
171 } // namespace JSBSim