Branch data Line data Source code
1 : : /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2 : :
3 : : Module: FGNozzle.cpp
4 : : Author: Jon S. Berndt
5 : : Date started: 08/24/00
6 : : Purpose: Encapsulates the nozzle object
7 : :
8 : : ------------- Copyright (C) 2000 Jon S. Berndt (jon@jsbsim.org) -------------
9 : :
10 : : This program is free software; you can redistribute it and/or modify it under
11 : : the terms of the GNU Lesser General Public License as published by the Free Software
12 : : Foundation; either version 2 of the License, or (at your option) any later
13 : : version.
14 : :
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 Lesser General Public License for more
18 : : details.
19 : :
20 : : You should have received a copy of the GNU Lesser 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.
23 : :
24 : : Further information about the GNU Lesser General Public License can also be found on
25 : : the world wide web at http://www.gnu.org.
26 : :
27 : : FUNCTIONAL DESCRIPTION
28 : : --------------------------------------------------------------------------------
29 : :
30 : : HISTORY
31 : : --------------------------------------------------------------------------------
32 : : 08/24/00 JSB Created
33 : :
34 : : %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
35 : : INCLUDES
36 : : %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
37 : :
38 : : #include <iostream>
39 : : #include <sstream>
40 : : #include <cstdlib>
41 : :
42 : : #include "FGNozzle.h"
43 : : #include "models/FGAtmosphere.h"
44 : : #include "input_output/FGXMLElement.h"
45 : :
46 : : using namespace std;
47 : :
48 : : namespace JSBSim {
49 : :
50 : : static const char *IdSrc = "$Id: FGNozzle.cpp,v 1.13 2009/10/26 03:49:58 jberndt Exp $";
51 : : static const char *IdHdr = ID_NOZZLE;
52 : :
53 : : /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
54 : : CLASS IMPLEMENTATION
55 : : %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
56 : :
57 : :
58 : 12 : FGNozzle::FGNozzle(FGFDMExec* FDMExec, Element* nozzle_element, int num)
59 : 12 : : FGThruster(FDMExec, nozzle_element, num)
60 : : {
61 [ + - ][ # # ]: 12 : if (nozzle_element->FindElement("area"))
62 : 12 : Area = nozzle_element->FindElementValueAsNumberConvertTo("area", "FT2");
63 : : else {
64 : 0 : cerr << "Fatal Error: Nozzle exit area must be given in nozzle config file." << endl;
65 : 0 : exit(-1);
66 : : }
67 : : /*
68 : : if (nozzle_element->FindElement("pe"))
69 : : PE = nozzle_element->FindElementValueAsNumberConvertTo("pe", "PSF");
70 : : else {
71 : : cerr << "Fatal Error: Nozzle exit pressure must be given in nozzle config file." << endl;
72 : : exit(-1);
73 : : }
74 : : */
75 : 12 : Thrust = 0;
76 : 12 : Type = ttNozzle;
77 : :
78 : 12 : Debug(0);
79 : 12 : }
80 : :
81 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
82 : :
83 : 12 : FGNozzle::~FGNozzle()
84 : : {
85 : 12 : Debug(1);
86 [ + - ][ # # ]: 12 : }
[ # # ]
87 : :
88 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
89 : :
90 : 648060 : double FGNozzle::Calculate(double vacThrust)
91 : : {
92 : 1296120 : double pAtm = fdmex->GetAtmosphere()->GetPressure();
93 : 1296120 : Thrust = max((double)0.0, vacThrust - pAtm*Area);
94 : :
95 : 648060 : vFn(1) = Thrust * cos(ReverserAngle);
96 : :
97 : 648060 : return Thrust;
98 : : }
99 : :
100 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
101 : :
102 : 12 : string FGNozzle::GetThrusterLabels(int id, string delimeter)
103 : : {
104 : 12 : std::ostringstream buf;
105 : :
106 : 12 : buf << Name << " Thrust (engine " << id << " in lbs)";
107 : :
108 : 12 : return buf.str();
109 : : }
110 : :
111 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
112 : :
113 : 58908 : string FGNozzle::GetThrusterValues(int id, string delimeter)
114 : : {
115 : 58908 : std::ostringstream buf;
116 : :
117 : 58908 : buf << Thrust;
118 : :
119 : 58908 : return buf.str();
120 : : }
121 : :
122 : : //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
123 : : // The bitmasked value choices are as follows:
124 : : // unset: In this case (the default) JSBSim would only print
125 : : // out the normally expected messages, essentially echoing
126 : : // the config files as they are read. If the environment
127 : : // variable is not set, debug_lvl is set to 1 internally
128 : : // 0: This requests JSBSim not to output any messages
129 : : // whatsoever.
130 : : // 1: This value explicity requests the normal JSBSim
131 : : // startup messages
132 : : // 2: This value asks for a message to be printed out when
133 : : // a class is instantiated
134 : : // 4: When this value is set, a message is displayed when a
135 : : // FGModel object executes its Run() method
136 : : // 8: When this value is set, various runtime state variables
137 : : // are printed out periodically
138 : : // 16: When set various parameters are sanity checked and
139 : : // a message is printed out when they go out of bounds
140 : :
141 : 24 : void FGNozzle::Debug(int from)
142 : : {
143 [ + - ]: 24 : if (debug_lvl <= 0) return;
144 : :
145 [ + - ]: 24 : if (debug_lvl & 1) { // Standard console startup message output
146 [ + + ]: 24 : if (from == 0) { // Constructor
147 : 12 : cout << " Nozzle Name: " << Name << endl;
148 : 12 : cout << " Nozzle Exit Area = " << Area << endl;
149 : : }
150 : : }
151 [ - + ]: 24 : if (debug_lvl & 2 ) { // Instantiation/Destruction notification
152 [ # # ]: 0 : if (from == 0) cout << "Instantiated: FGNozzle" << endl;
153 [ # # ]: 0 : if (from == 1) cout << "Destroyed: FGNozzle" << endl;
154 : : }
155 : 24 : if (debug_lvl & 4 ) { // Run() method entry print for FGModel-derived objects
156 : : }
157 : 24 : if (debug_lvl & 8 ) { // Runtime state variables
158 : : }
159 : 24 : if (debug_lvl & 16) { // Sanity checking
160 : : }
161 [ - + ]: 24 : if (debug_lvl & 64) {
162 [ # # ]: 0 : if (from == 0) { // Constructor
163 : 0 : cout << IdSrc << endl;
164 : 0 : cout << IdHdr << endl;
165 : : }
166 : : }
167 : : }
168 [ + + ][ + - ]: 12 : }
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