1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 Header: FGAerodynamics.h
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 FGAERODYNAMICS_H
35 #define FGAERODYNAMICS_H
37 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
39 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
42 # include <simgear/compiler.h>
43 # ifdef SG_HAVE_STD_INCLUDES
56 #include "FGConfigFile.h"
58 #include "FGMassBalance.h"
59 #include "FGTranslation.h"
60 #include "FGCoefficient.h"
61 #include "FGFactorGroup.h"
63 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
65 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
67 #define ID_AERODYNAMICS "$Id$"
69 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
71 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
75 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
77 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
79 /** Encapsulates the aerodynamic calculations.
80 This class owns and contains the list of coefficients that define the
81 aerodynamic properties of this aircraft. Here also, such unique phenomena
82 as ground effect and maximum lift curve tailoff are handled.
88 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
90 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
92 class FGAerodynamics : public FGModel {
96 @param Executive a pointer to the parent executive object */
97 FGAerodynamics(FGFDMExec* Executive);
101 /** Runs the Aerodynamics model; called by the Executive
102 @return false if no error */
105 /** Loads the Aerodynamics model.
106 The Load function for this class expects the configuration file to
107 have found the AERODYNAMICS keyword in the configution file and to
108 have set that line to the current line.
109 @param AC_cfg pointer to the current configuration file.
110 @return true if successful */
111 bool Load(FGConfigFile* AC_cfg);
113 /** Gets the total aerodynamic force vector.
114 @return a force vector reference. */
115 FGColumnVector3& GetForces(void) {return vForces;}
117 /** Gets the aerodynamic force for an axis.
118 @param n Axis index. This could be 0, 1, or 2, or one of the
119 axis enums: eX, eY, eZ.
120 @return the force acting on an axis */
121 double GetForces(int n) const {return vForces(n);}
123 /** Gets the total aerodynamic moment vector.
124 @return a moment vector reference. */
125 FGColumnVector3& GetMoments(void) {return vMoments;}
127 /** Gets the aerodynamic moment for an axis.
128 @return the moment about a single axis (as described also in the
129 similar call to GetForces(int n).*/
130 double GetMoments(int n) const {return vMoments(n);}
132 FGColumnVector3& GetvLastFs(void) { return vLastFs; }
133 double GetvLastFs(int axis) const { return vLastFs(axis); }
134 FGColumnVector3& GetvFs(void) { return vFs; }
135 double GetvFs(int axis) const { return vFs(axis); }
136 inline double GetLoD(void) const { return lod; }
137 inline double GetClSquared(void) const { return clsq; }
138 inline double GetAlphaCLMax(void) const { return alphaclmax; }
139 inline double GetAlphaCLMin(void) const { return alphaclmin; }
141 inline double GetAlphaHystMax(void) const { return alphahystmax; }
142 inline double GetAlphaHystMin(void) const { return alphahystmin; }
143 inline double GetHysteresisParm(void) const { return stall_hyst; }
144 inline double GetStallWarn(void) const { return impending_stall; }
145 double GetAlphaW(void) const { return alphaw; }
147 double GetBI2Vel(void) const { return bi2vel; }
148 double GetCI2Vel(void) const { return ci2vel; }
150 inline void SetAlphaCLMax(double tt) { alphaclmax=tt; }
151 inline void SetAlphaCLMin(double tt) { alphaclmin=tt; }
153 /** Gets the strings for the current set of coefficients.
154 @return a string containing the descriptive names for all coefficients */
155 string GetCoefficientStrings(void);
157 /** Gets the coefficient values.
158 @return a string containing the numeric values for the current set of
160 string GetCoefficientValues(void);
163 void bindModel(void);
167 typedef map<string,int> AxisIndex;
169 typedef vector<FGCoefficient*> CoeffArray;
172 FGColumnVector3 vForces;
173 FGColumnVector3 vMoments;
174 FGColumnVector3 vLastFs;
175 FGColumnVector3 vDXYZcg;
176 double alphaclmax, alphaclmin;
177 double alphahystmax, alphahystmin;
178 double impending_stall, stall_hyst;
179 double bi2vel, ci2vel,alphaw;
182 typedef double (FGAerodynamics::*PMF)(int) const;
184 void Debug(int from);
187 } // namespace JSBSim
189 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%