-/*******************************************************************************
+/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Module: FGAerodynamics.cpp
Author: Jon S. Berndt
HISTORY
--------------------------------------------------------------------------------
09/13/00 JSB Created
+04/22/01 JSB Moved code into here from FGAircraft
-********************************************************************************
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
INCLUDES
-*******************************************************************************/
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
#include "FGAerodynamics.h"
+#include "FGFactorGroup.h"
+#include "FGCoefficient.h"
+#include "FGPropertyManager.h"
-static const char *IdSrc = "$Header$";
+static const char *IdSrc = "$Id$";
static const char *IdHdr = ID_AERODYNAMICS;
-/*******************************************************************************
-************************************ CODE **************************************
-*******************************************************************************/
+const unsigned NAxes=6;
+const char* AxisNames[] = { "drag", "side-force", "lift", "rolling-moment",
+ "pitching-moment","yawing-moment" };
+/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+CLASS IMPLEMENTATION
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
-FGAerodynamics::FGAerodynamics(FGFDMExec* fgex) : FGModel(fgex)
+
+FGAerodynamics::FGAerodynamics(FGFDMExec* FDMExec) : FGModel(FDMExec)
{
+ Name = "FGAerodynamics";
+
+ AxisIdx["DRAG"] = 0;
+ AxisIdx["SIDE"] = 1;
+ AxisIdx["LIFT"] = 2;
+ AxisIdx["ROLL"] = 3;
+ AxisIdx["PITCH"] = 4;
+ AxisIdx["YAW"] = 5;
+
+ Coeff = new CoeffArray[6];
+
+ impending_stall = stall_hyst = 0.0;
+ alphaclmin = alphaclmax = 0.0;
+ alphahystmin = alphahystmax = 0.0;
+ clsq = lod = 0.0;
+ alphaw = 0.0;
+ bind();
+
+ Debug(0);
+}
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+FGAerodynamics::~FGAerodynamics()
+{
+ unsigned int i,j;
+
+ unbind();
+
+ for (i=0; i<6; i++) {
+ for (j=0; j<Coeff[i].size(); j++) {
+ delete Coeff[i][j];
+ }
+ }
+ delete[] Coeff;
+
+ Debug(1);
}
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-bool FGAerodynamics:: Run(void) {
+bool FGAerodynamics::Run(void)
+{
+ unsigned int axis_ctr,ctr;
+ double alpha, twovel;
if (!FGModel::Run()) {
+ twovel = 2*Translation->GetVt();
+ if (twovel > 0) {
+ bi2vel = Aircraft->GetWingSpan() / twovel;
+ ci2vel = Aircraft->Getcbar() / twovel;
+ }
+
+ alphaw = Translation->Getalpha() + Aircraft->GetWingIncidence();
+
+ alpha = Translation->Getalpha();
+
+ if (alphaclmax != 0) {
+ if (alpha > 0.85*alphaclmax) {
+ impending_stall = 10*(alpha/alphaclmax - 0.85);
+ } else {
+ impending_stall = 0;
+ }
+ }
+
+ if (alphahystmax != 0.0 && alphahystmin != 0.0) {
+ if (alpha > alphahystmax) {
+ stall_hyst = 1;
+ } else if (alpha < alphahystmin) {
+ stall_hyst = 0;
+ }
+ }
+
+ vLastFs = vFs;
+ vFs.InitMatrix();
+
+ for (axis_ctr = 0; axis_ctr < 3; axis_ctr++) {
+ for (ctr=0; ctr < Coeff[axis_ctr].size(); ctr++) {
+ vFs(axis_ctr+1) += Coeff[axis_ctr][ctr]->TotalValue();
+ }
+ }
+
+ //correct signs of drag and lift to wind axes convention
+ //positive forward, right, down
+ if ( Translation->Getqbar() > 0) {
+ clsq = vFs(eLift) / (Aircraft->GetWingArea()*Translation->Getqbar());
+ clsq *= clsq;
+ }
+ if ( vFs(eDrag) > 0) {
+ lod = vFs(eLift) / vFs(eDrag);
+ }
+
+ //correct signs of drag and lift to wind axes convention
+ //positive forward, right, down
+ vFs(eDrag)*=-1; vFs(eLift)*=-1;
+
+ vForces = State->GetTs2b()*vFs;
+
+ vDXYZcg(eX) = -(Aircraft->GetXYZrp(eX)
+ - MassBalance->GetXYZcg(eX))*inchtoft;
+ vDXYZcg(eY) = (Aircraft->GetXYZrp(eY)
+ - MassBalance->GetXYZcg(eY))*inchtoft;
+ vDXYZcg(eZ) = -(Aircraft->GetXYZrp(eZ)
+ - MassBalance->GetXYZcg(eZ))*inchtoft;
+
+ vMoments = vDXYZcg*vForces; // M = r X F
+
+ for (axis_ctr = 0; axis_ctr < 3; axis_ctr++) {
+ for (ctr = 0; ctr < Coeff[axis_ctr+3].size(); ctr++) {
+ vMoments(axis_ctr+1) += Coeff[axis_ctr+3][ctr]->TotalValue();
+ }
+ }
+
return false;
} else {
return true;
}
}
-bool FGAerodynamics::LoadAerodynamics(FGConfigFile* AC_cfg)
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+bool FGAerodynamics::Load(FGConfigFile* AC_cfg)
+{
+ string parameter, axis, scratch;
+
+ AC_cfg->GetNextConfigLine();
+
+ while ((parameter = AC_cfg->GetValue()) != string("/AERODYNAMICS")) {
+ if (parameter == "AXIS") {
+ CoeffArray ca;
+ axis = AC_cfg->GetValue("NAME");
+ AC_cfg->GetNextConfigLine();
+ while ((parameter = AC_cfg->GetValue()) != string("/AXIS")) {
+ if ( parameter == "COEFFICIENT" ) {
+ ca.push_back( new FGCoefficient(FDMExec) );
+ ca.back()->Load(AC_cfg);
+ } else if ( parameter == "GROUP" ) {
+ ca.push_back( new FGFactorGroup(FDMExec) );
+ ca.back()->Load(AC_cfg);
+ }
+ }
+ Coeff[AxisIdx[axis]] = ca;
+ AC_cfg->GetNextConfigLine();
+ } else if (parameter == "AC_ALPHALIMITS") {
+ *AC_cfg >> scratch >> alphaclmin >> alphaclmax;
+ if (debug_lvl > 0) cout << " Maximum Alpha: " << alphaclmax
+ << " Minimum Alpha: " << alphaclmin
+ << endl;
+ } else if (parameter == "AC_HYSTLIMITS") {
+ *AC_cfg >> scratch >> alphahystmin >> alphahystmax;
+ if (debug_lvl > 0) cout << " Hysteresis Start: " << alphahystmax
+ << " Hysteresis End: " << alphahystmin
+ << endl;
+ }
+ }
+
+ bindModel();
+
+ return true;
+}
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+string FGAerodynamics::GetCoefficientStrings(void)
+{
+ string CoeffStrings = "";
+ bool firstime = true;
+ unsigned int axis, sd;
+
+ for (axis = 0; axis < 6; axis++) {
+ for (sd = 0; sd < Coeff[axis].size(); sd++) {
+ if (firstime) {
+ firstime = false;
+ } else {
+ CoeffStrings += ", ";
+ }
+ CoeffStrings += Coeff[axis][sd]->GetCoefficientName();
+ }
+ }
+ return CoeffStrings;
+}
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+string FGAerodynamics::GetCoefficientValues(void)
+{
+ string SDValues = "";
+ bool firstime = true;
+
+ for (unsigned int axis = 0; axis < 6; axis++) {
+ for (unsigned int sd = 0; sd < Coeff[axis].size(); sd++) {
+ if (firstime) {
+ firstime = false;
+ } else {
+ SDValues += ", ";
+ }
+ SDValues += Coeff[axis][sd]->GetSDstring();
+ }
+ }
+
+ return SDValues;
+}
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+void FGAerodynamics::bind(void)
+{
+ typedef double (FGAerodynamics::*PMF)(int) const;
+
+ PropertyManager->Tie("forces/fbx-aero-lbs", this,1,
+ (PMF)&FGAerodynamics::GetForces);
+ PropertyManager->Tie("forces/fby-aero-lbs", this,2,
+ (PMF)&FGAerodynamics::GetForces);
+ PropertyManager->Tie("forces/fbz-aero-lbs", this,3,
+ (PMF)&FGAerodynamics::GetForces);
+ PropertyManager->Tie("moments/l-aero-lbsft", this,1,
+ (PMF)&FGAerodynamics::GetMoments);
+ PropertyManager->Tie("moments/m-aero-lbsft", this,2,
+ (PMF)&FGAerodynamics::GetMoments);
+ PropertyManager->Tie("moments/n-aero-lbsft", this,3,
+ (PMF)&FGAerodynamics::GetMoments);
+ PropertyManager->Tie("forces/fwx-aero-lbs", this,1,
+ (PMF)&FGAerodynamics::GetvFs);
+ PropertyManager->Tie("forces/fwy-aero-lbs", this,2,
+ (PMF)&FGAerodynamics::GetvFs);
+ PropertyManager->Tie("forces/fwz-aero-lbs", this,3,
+ (PMF)&FGAerodynamics::GetvFs);
+ PropertyManager->Tie("forces/lod-norm", this,
+ &FGAerodynamics::GetLoD);
+ PropertyManager->Tie("aero/cl-squared-norm", this,
+ &FGAerodynamics::GetClSquared);
+ PropertyManager->Tie("aero/alpha-max-deg", this,
+ &FGAerodynamics::GetAlphaCLMax,
+ &FGAerodynamics::SetAlphaCLMax,
+ true);
+ PropertyManager->Tie("aero/alpha-min-deg", this,
+ &FGAerodynamics::GetAlphaCLMin,
+ &FGAerodynamics::SetAlphaCLMin,
+ true);
+ PropertyManager->Tie("aero/bi2vel", this,
+ &FGAerodynamics::GetBI2Vel);
+ PropertyManager->Tie("aero/ci2vel", this,
+ &FGAerodynamics::GetCI2Vel);
+ PropertyManager->Tie("aero/alpha-wing-rad", this,
+ &FGAerodynamics::GetAlphaW);
+ PropertyManager->Tie("systems/stall-warn-norm", this,
+ &FGAerodynamics::GetStallWarn);
+ PropertyManager->Tie("aero/stall-hyst-norm", this,
+ &FGAerodynamics::GetHysteresisParm);
+}
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+void FGAerodynamics::bindModel(void)
+{
+ unsigned i,j;
+ FGPropertyManager* node;
+ string axis_node_name;
+ node = PropertyManager->GetNode("aero/buildup",true);
+ for (i=0;i<NAxes;i++) {
+ node = node->GetNode( string(AxisNames[i]),true );
+ for (j=0; j < Coeff[i].size(); j++) {
+ Coeff[i][j]->bind(node);
+ }
+ node = (FGPropertyManager*)node->getParent();
+ }
+}
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+void FGAerodynamics::unbind(void)
{
-//
+ unsigned i,j;
+
+ PropertyManager->Untie("forces/fbx-aero-lbs");
+ PropertyManager->Untie("forces/fby-aero-lbs");
+ PropertyManager->Untie("forces/fbz-aero-lbs");
+ PropertyManager->Untie("moments/l-aero-lbsft");
+ PropertyManager->Untie("moments/m-aero-lbsft");
+ PropertyManager->Untie("moments/n-aero-lbsft");
+ PropertyManager->Untie("forces/fwx-aero-lbs");
+ PropertyManager->Untie("forces/fwy-aero-lbs");
+ PropertyManager->Untie("forces/fwz-aero-lbs");
+ PropertyManager->Untie("forces/lod-norm");
+ PropertyManager->Untie("aero/cl-squared-norm");
+ PropertyManager->Untie("aero/alpha-max-deg");
+ PropertyManager->Untie("aero/alpha-min-deg");
+ PropertyManager->Untie("aero/bi2vel");
+ PropertyManager->Untie("aero/ci2vel");
+ PropertyManager->Untie("aero/alpha-wing-rad");
+ PropertyManager->Untie("systems/stall-warn-norm");
+
+ for ( i=0; i<NAxes; i++ ) {
+ for ( j=0; j < Coeff[i].size(); j++ ) {
+ Coeff[i][j]->unbind();
+
+ }
+ }
+}
+
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+// The bitmasked value choices are as follows:
+// unset: In this case (the default) JSBSim would only print
+// out the normally expected messages, essentially echoing
+// the config files as they are read. If the environment
+// variable is not set, debug_lvl is set to 1 internally
+// 0: This requests JSBSim not to output any messages
+// whatsoever.
+// 1: This value explicity requests the normal JSBSim
+// startup messages
+// 2: This value asks for a message to be printed out when
+// a class is instantiated
+// 4: When this value is set, a message is displayed when a
+// FGModel object executes its Run() method
+// 8: When this value is set, various runtime state variables
+// are printed out periodically
+// 16: When set various parameters are sanity checked and
+// a message is printed out when they go out of bounds
+
+void FGAerodynamics::Debug(int from)
+{
+ if (debug_lvl <= 0) return;
+
+ if (debug_lvl & 1) { // Standard console startup message output
+ if (from == 0) { // Constructor
+
+ }
+ }
+ if (debug_lvl & 2 ) { // Instantiation/Destruction notification
+ if (from == 0) cout << "Instantiated: FGAerodynamics" << endl;
+ if (from == 1) cout << "Destroyed: FGAerodynamics" << endl;
+ }
+ if (debug_lvl & 4 ) { // Run() method entry print for FGModel-derived objects
+ }
+ if (debug_lvl & 8 ) { // Runtime state variables
+ }
+ if (debug_lvl & 16) { // Sanity checking
+ }
+ if (debug_lvl & 64) {
+ if (from == 0) { // Constructor
+ cout << IdSrc << endl;
+ cout << IdHdr << endl;
+ }
+ }
}
projects / flightgear.git / blobdiff