1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 Module: FGMassBalance.cpp
5 Date started: 09/12/2000
6 Purpose: This module models weight and balance
8 ------------- Copyright (C) 2000 Jon S. Berndt (jsb@hal-pc.org) --------------
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 models the change in weight and balance of the aircraft due to fuel
34 --------------------------------------------------------------------------------
35 09/12/2000 JSB Created
37 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
39 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
41 #include "FGMassBalance.h"
43 static const char *IdSrc = "$Id$";
44 static const char *IdHdr = ID_MASSBALANCE;
46 extern short debug_lvl;
48 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
50 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
53 FGMassBalance::FGMassBalance(FGFDMExec* fdmex) : FGModel(fdmex)
55 Name = "FGMassBalance";
57 if (debug_lvl & 2) cout << "Instantiated: FGMassBalance" << endl;
60 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
62 FGMassBalance::~FGMassBalance()
64 if (debug_lvl & 2) cout << "Destroyed: FGMassBalance" << endl;
67 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
69 bool FGMassBalance::Run(void)
71 if (!FGModel::Run()) {
73 Weight = EmptyWeight + Propulsion->GetTanksWeight();
75 Mass = Weight / GRAVITY;
77 // Calculate new CG here.
79 vXYZcg = (Propulsion->GetTanksCG() + EmptyWeight*vbaseXYZcg) / Weight;
81 // Calculate new moments of inertia here
83 Ixx = baseIxx + Propulsion->GetTanksIxx(vXYZcg);
84 Iyy = baseIyy + Propulsion->GetTanksIyy(vXYZcg);
85 Izz = baseIzz + Propulsion->GetTanksIzz(vXYZcg);
86 Ixz = baseIxz + Propulsion->GetTanksIxz(vXYZcg);
88 if (debug_lvl > 1) Debug();
96 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
98 void FGMassBalance::Debug(void)
100 if (debug_lvl & 16) { // Sanity check variables
101 if (EmptyWeight <= 0.0 || EmptyWeight > 1e9)
102 cout << "MassBalance::EmptyWeight out of bounds: " << EmptyWeight << endl;
103 if (Weight <= 0.0 || Weight > 1e9)
104 cout << "MassBalance::Weight out of bounds: " << Weight << endl;
105 if (Mass <= 0.0 || Mass > 1e9)
106 cout << "MassBalance::Mass out of bounds: " << Mass << endl;