Rob Deters: UIUC updates from March 1, 2004.

[flightgear.git] / src / FDM / JSBSim / FGAuxiliary.cpp

diff --git a/src/FDM/JSBSim/FGAuxiliary.cpp b/src/FDM/JSBSim/FGAuxiliary.cpp
index 0ef2a322193579863976f8d9400d8d6fc956d275..09b2aefc74dc08993f3dc40adb88e43302d18545 100644 (file)
--- a/src/FDM/JSBSim/FGAuxiliary.cpp
+++ b/src/FDM/JSBSim/FGAuxiliary.cpp
@@ -47,16 +47,12 @@ INCLUDES
 #include "FGAtmosphere.h"
 #include "FGState.h"
 #include "FGFDMExec.h"
-#include "FGFCS.h"
 #include "FGAircraft.h"
-#include "FGPosition.h"
-#include "FGOutput.h"
 #include "FGInertial.h"
-#include "FGMatrix33.h"
-#include "FGColumnVector3.h"
-#include "FGColumnVector4.h"
 #include "FGPropertyManager.h"
 
+namespace JSBSim {
+
 static const char *IdSrc = "$Id$";
 static const char *IdHdr = ID_AUXILIARY;
 
@@ -68,7 +64,7 @@ CLASS IMPLEMENTATION
 FGAuxiliary::FGAuxiliary(FGFDMExec* fdmex) : FGModel(fdmex)
 {
   Name = "FGAuxiliary";
-  vcas = veas = mach = qbar = pt = 0;
+  vcas = veas = mach = qbar = pt = tat = 0;
   psl = rhosl = 1;
   earthPosAngle = 0.0;
   
@@ -83,6 +79,7 @@ FGAuxiliary::FGAuxiliary(FGFDMExec* fdmex) : FGModel(fdmex)
 
 FGAuxiliary::~FGAuxiliary()
 {
+  unbind();
   Debug(1);
 }
 
@@ -94,25 +91,34 @@ bool FGAuxiliary::Run()
 
   if (!FGModel::Run()) {
     GetState();
+    
+    //calculate total temperature assuming isentropic flow
+    tat=sat*(1 + 0.2*mach*mach);
+    tatc=RankineToCelsius(tat);
+    
     if (mach < 1) {   //calculate total pressure assuming isentropic flow
-      pt=p*pow((1 + 0.2*mach*mach),3.5);
+      pt = p*pow((1 + 0.2*machU*machU),3.5);
     } else {
       // shock in front of pitot tube, we'll assume its normal and use
       // the Rayleigh Pitot Tube Formula, i.e. the ratio of total
       // pressure behind the shock to the static pressure in front
 
-      B = 5.76*mach*mach/(5.6*mach*mach - 0.8);
+      B = 5.76*machU*machU/(5.6*machU*machU - 0.8);
 
       // The denominator above is zero for Mach ~ 0.38, for which
       // we'll never be here, so we're safe
 
-      D = (2.8*mach*mach-0.4)*0.4167;
+      D = (2.8*machU*machU-0.4)*0.4167;
       pt = p*pow(B,3.5)*D;
     }
 
     A = pow(((pt-p)/psl+1),0.28571);
-    vcas = sqrt(7*psl/rhosl*(A-1));
-    veas = sqrt(2*qbar/rhosl);
+    if (machU > 0.0) {
+      vcas = sqrt(7*psl/rhosl*(A-1));
+      veas = sqrt(2*qbar/rhosl);
+    } else {
+      vcas = veas = 0.0;
+    }
 
     // Pilot sensed accelerations are calculated here. This is used
     // for the coordinated turn ball instrument. Motion base platforms sometimes
@@ -154,17 +160,19 @@ bool FGAuxiliary::Run()
     
     vPilotAccel.InitMatrix();   
     if ( Translation->GetVt() > 1 ) {
-      vToEyePt = Aircraft->GetXYZep() - MassBalance->GetXYZcg();
-      vToEyePt *= inchtoft;
-      vPilotAccel =  Aerodynamics->GetForces() 
-                  +  Propulsion->GetForces()
-                  +  GroundReactions->GetForces();
-      vPilotAccel /= MassBalance->GetMass();
-      vPilotAccel += Rotation->GetPQRdot() * vToEyePt;
-      vPilotAccel += Rotation->GetPQR() * (Rotation->GetPQR() * vToEyePt);
-      //vPilotAccel(2)*=-1;
-      vPilotAccelN = vPilotAccel/Inertial->gravity();
-    }
+       vPilotAccel =  Aerodynamics->GetForces() 
+                      +  Propulsion->GetForces()
+                      +  GroundReactions->GetForces();
+       vPilotAccel /= MassBalance->GetMass();
+       vToEyePt = MassBalance->StructuralToBody(Aircraft->GetXYZep());
+       vPilotAccel += Rotation->GetPQRdot() * vToEyePt;
+       vPilotAccel += Rotation->GetPQR() * (Rotation->GetPQR() * vToEyePt);
+    } else {
+       vPilotAccel = -1*( State->GetTl2b() * Inertial->GetGravity() );
+    }   
+
+    vPilotAccelN = vPilotAccel/Inertial->gravity();
+
     earthPosAngle += State->Getdt()*Inertial->omega();
     return false;
   } else {
@@ -211,6 +219,15 @@ void FGAuxiliary::bind(void)
                        &FGAuxiliary::GetVequivalentFPS);
   PropertyManager->Tie("velocities/ve-kts", this,
                        &FGAuxiliary::GetVequivalentKTS);
+  PropertyManager->Tie("velocities/machU", this,
+                       &FGAuxiliary::GetMachU);
+  PropertyManager->Tie("velocities/tat-r", this,
+                       &FGAuxiliary::GetTotalTemperature);
+  PropertyManager->Tie("velocities/tat-c", this,
+                       &FGAuxiliary::GetTAT_C);
+  PropertyManager->Tie("velocities/pt-lbs_sqft", this,
+                       &FGAuxiliary::GetTotalPressure);
+                     
   PropertyManager->Tie("accelerations/a-pilot-x-ft_sec2", this,1,
                        (PMF)&FGAuxiliary::GetPilotAccel);
   PropertyManager->Tie("accelerations/a-pilot-y-ft_sec2", this,2,
@@ -241,6 +258,9 @@ void FGAuxiliary::unbind(void)
   PropertyManager->Untie("velocities/vc-kts");
   PropertyManager->Untie("velocities/ve-fps");
   PropertyManager->Untie("velocities/ve-kts");
+  PropertyManager->Untie("velocities/machU");
+  PropertyManager->Untie("velocities/tat-r");
+  PropertyManager->Untie("velocities/tat-c");
   PropertyManager->Untie("accelerations/a-pilot-x-ft_sec2");
   PropertyManager->Untie("accelerations/a-pilot-y-ft_sec2");
   PropertyManager->Untie("accelerations/a-pilot-z-ft_sec2");
@@ -259,9 +279,11 @@ void FGAuxiliary::GetState(void)
 {
   qbar = Translation->Getqbar();
   mach = Translation->GetMach();
+  machU= Translation->GetMachU();
   p = Atmosphere->GetPressure();
   rhosl = Atmosphere->GetDensitySL();
   psl = Atmosphere->GetPressureSL();
+  sat = Atmosphere->GetTemperature();
 }
 
 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -310,3 +332,4 @@ void FGAuxiliary::Debug(int from)
   }
 }
 
+} // namespace JSBSim