Detailed Description

Definition at line 86 of file FGTrimAxis.h.

Inheritance diagram for FGTrimAxis:

Collaboration diagram for FGTrimAxis:

Public Member Functions
	FGTrimAxis (FGFDMExec fdmex, FGInitialCondition IC, State state, Control control)
	Constructor for Trim Axis class.

	~FGTrimAxis ()
	Destructor.

void	AxisReport (void)

double	GetAvgStability (void)

double	GetControl (void)

double	GetControlMax (void)

double	GetControlMin (void)

std::string	GetControlName (void)

Control	GetControlType (void)

int	GetIterationLimit (void)

int	GetRunCount (void)

double	GetSolverEps (void)

int	GetStability (void)

double	GetState (void)

std::string	GetStateName (void)

double	GetStateTarget (void)

State	GetStateType (void)

double	GetTolerance (void)

bool	InTolerance (void)

void	Run (void)
	This function iterates through a call to the FGFDMExec::RunIC() function until the desired trimming condition falls inside a tolerance.

void	SetControl (double value)

void	SetControlLimits (double min, double max)

void	SetControlToMax (void)

void	SetControlToMin (void)

void	SetIterationLimit (int ii)

void	SetSolverEps (double ff)

void	SetStateTarget (double target)

void	SetTolerance (double ff)

Public Member Functions inherited from FGJSBBase
	FGJSBBase ()
	Constructor for FGJSBBase.

virtual	~FGJSBBase ()
	Destructor for FGJSBBase.

Additional Inherited Members
Public Types inherited from FGJSBBase
enum	{ eL = 1 , eM , eN }
	Moments L, M, N. More...

enum	{ eP = 1 , eQ , eR }
	Rates P, Q, R. More...

enum	{ eU = 1 , eV , eW }
	Velocities U, V, W. More...

enum	{ eX = 1 , eY , eZ }
	Positions X, Y, Z. More...

enum	{ ePhi = 1 , eTht , ePsi }
	Euler angles Phi, Theta, Psi. More...

enum	{ eDrag = 1 , eSide , eLift }
	Stability axis forces, Drag, Side force, Lift. More...

enum	{ eRoll = 1 , ePitch , eYaw }
	Local frame orientation Roll, Pitch, Yaw. More...

enum	{ eNorth = 1 , eEast , eDown }
	Local frame position North, East, Down. More...

enum	{ eLat = 1 , eLong , eRad }
	Locations Radius, Latitude, Longitude. More...

enum	{ inNone = 0 , inDegrees , inRadians , inMeters , inFeet }
	Conversion specifiers. More...

Static Public Member Functions inherited from FGJSBBase
static constexpr double	CelsiusToFahrenheit (double celsius)
	Converts from degrees Celsius to degrees Fahrenheit.

static constexpr double	CelsiusToKelvin (double celsius)
	Converts from degrees Celsius to degrees Kelvin.

static constexpr double	CelsiusToRankine (double celsius)
	Converts from degrees Celsius to degrees Rankine.

static constexpr double	Constrain (double min, double value, double max)
	Constrain a value between a minimum and a maximum value.

static bool	EqualToRoundoff (double a, double b)
	Finite precision comparison.

static bool	EqualToRoundoff (double a, float b)
	Finite precision comparison.

static bool	EqualToRoundoff (float a, double b)
	Finite precision comparison.

static bool	EqualToRoundoff (float a, float b)
	Finite precision comparison.

static constexpr double	FahrenheitToCelsius (double fahrenheit)
	Converts from degrees Fahrenheit to degrees Celsius.

static constexpr double	FeetToMeters (double measure)
	Converts from feet to meters.

static const std::string &	GetVersion (void)
	Returns the version number of JSBSim.

static constexpr double	KelvinToCelsius (double kelvin)
	Converts from degrees Kelvin to degrees Celsius.

static constexpr double	KelvinToFahrenheit (double kelvin)
	Converts from degrees Kelvin to degrees Fahrenheit.

static constexpr double	KelvinToRankine (double kelvin)
	Converts from degrees Kelvin to degrees Rankine.

static constexpr double	RankineToCelsius (double rankine)
	Converts from degrees Rankine to degrees Celsius.

static constexpr double	RankineToKelvin (double rankine)
	Converts from degrees Rankine to degrees Kelvin.

static constexpr double	sign (double num)

Static Public Attributes inherited from FGJSBBase
static short	debug_lvl = 1

Static Protected Member Functions inherited from FGJSBBase
static std::string	CreateIndexedPropertyName (const std::string &Property, int index)

Static Protected Attributes inherited from FGJSBBase
static constexpr double	degtorad = M_PI / 180.

static constexpr double	fpstokts = 1.0 / ktstofps

static constexpr double	fttom = 0.3048

static constexpr double	hptoftlbssec = 550.0

static constexpr double	in3tom3 = inchtoftinchtoftinchtoft/m3toft3

static constexpr double	inchtoft = 1.0/12.0

static constexpr double	inhgtopa = 3386.38

static const std::string	JSBSim_version = JSBSIM_VERSION " " __DATE__ " " __TIME__

static constexpr double	kgtolb = 2.20462

static constexpr double	kgtoslug = 0.06852168

static constexpr double	ktstofps = 1852./(3600*fttom)

static constexpr double	lbtoslug = 1.0/slugtolb

static constexpr double	m3toft3 = 1.0/(fttomfttomfttom)

static const std::string	needed_cfg_version = "2.0"

static constexpr double	psftoinhg = 0.014138

static constexpr double	psftopa = 47.88

static constexpr double	radtodeg = 180. / M_PI

static constexpr double	slugtolb = 32.174049
	Note that definition of lbtoslug by the inverse of slugtolb and not to a different constant you can also get from some tables will make lbtoslug*slugtolb == 1 up to the magnitude of roundoff.

Constructor & Destructor Documentation

◆ FGTrimAxis()

FGTrimAxis	(	FGFDMExec *	fdmex,
		FGInitialCondition *	IC,
		State	state,
		Control	control
	)

Constructor for Trim Axis class.

Parameters

fdmex	FGFDMExec pointer
IC	pointer to initial conditions instance
state	a State type (enum)
control	a Control type (enum)

Definition at line 63 of file FGTrimAxis.cpp.

                                     {
 
  fdmex=fdex;
  fgic=ic;
  state=st;
  control=ctrl;
  max_iterations=10;
  control_value=0;
  its_to_stable_value=0;
  total_iterations=0;
  total_stability_iterations=0;
  state_convert=1.0;
  control_convert=1.0;
  state_value=0;
  state_target=0;
  tolerance=DEFAULT_TOLERANCE;
  switch(state) {
    case tUdot: tolerance = DEFAULT_TOLERANCE; break;
    case tVdot: tolerance = DEFAULT_TOLERANCE; break;
    case tWdot: tolerance = DEFAULT_TOLERANCE; break;
    case tQdot: tolerance = DEFAULT_TOLERANCE / 10; break;
    case tPdot: tolerance = DEFAULT_TOLERANCE / 10; break;
    case tRdot: tolerance = DEFAULT_TOLERANCE / 10; break;
    case tHmgt: tolerance = 0.01; break;
    case  tNlf: state_target=1.0; tolerance = 1E-5; break;
    case tAll: break;
  }
 
  solver_eps=tolerance;
  switch(control) {
  case tThrottle:
    control_min=0;
    control_max=1;
    control_value=0.5;
    break;
  case tBeta:
    control_min=-30*degtorad;
    control_max=30*degtorad;
    control_convert=radtodeg;
    break;
  case tAlpha:
    control_min=fdmex->GetAerodynamics()->GetAlphaCLMin();
    control_max=fdmex->GetAerodynamics()->GetAlphaCLMax();
    if(control_max <= control_min) {
      control_max=20*degtorad;
      control_min=-5*degtorad;
    }
    control_value= (control_min+control_max)/2;
    control_convert=radtodeg;
    solver_eps=tolerance/100;
    break;
  case tPitchTrim:
  case tElevator:
  case tRollTrim:
  case tAileron:
  case tYawTrim:
  case tRudder:
    control_min=-1;
    control_max=1;
    state_convert=radtodeg;
    solver_eps=tolerance/100;
    break;
  case tAltAGL:
    control_min=0;
    control_max=30;
    control_value=ic->GetAltitudeAGLFtIC();
    solver_eps=tolerance/100;
    break;
  case tTheta:
    control_min=ic->GetThetaRadIC() - 5*degtorad;
    control_max=ic->GetThetaRadIC() + 5*degtorad;
    state_convert=radtodeg;
    break;
  case tPhi:
    control_min=ic->GetPhiRadIC() - 30*degtorad;
    control_max=ic->GetPhiRadIC() + 30*degtorad;
    state_convert=radtodeg;
    control_convert=radtodeg;
    break;
  case tGamma:
    solver_eps=tolerance/100;
    control_min=-80*degtorad;
    control_max=80*degtorad;
    control_convert=radtodeg;
    break;
  case tHeading:
    control_min=ic->GetPsiRadIC() - 30*degtorad;
    control_max=ic->GetPsiRadIC() + 30*degtorad;
    state_convert=radtodeg;
    break;
  }
 
 
  Debug(0);
}

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◆ ~FGTrimAxis()

~FGTrimAxis ( void )

Destructor.

Definition at line 162 of file FGTrimAxis.cpp.

{
  Debug(1);
}

Member Function Documentation

◆ AxisReport()

void AxisReport ( void )

Definition at line 295 of file FGTrimAxis.cpp.

                                {
  FGLogging out(LogLevel::STDOUT);
  out << "  " << left << setw(20) << GetControlName() << ": ";
  out << setw(6) << setprecision(2) << GetControl()*control_convert << ' ';
  out << setw(5) << GetStateName() << ": ";
  out << setw(9) << setprecision(2) << scientific << GetState()+state_target;
  out << " Tolerance: " << setw(3) << setprecision(0) << scientific << GetTolerance();
 
  if( fabs(GetState()+state_target) < fabs(GetTolerance()) )
     out << "  Passed\n";
  else
     out << "  Failed\n";
}

◆ GetAvgStability()

double GetAvgStability ( void )

Definition at line 311 of file FGTrimAxis.cpp.

                                         {
  if(total_iterations > 0) {
    return double(total_stability_iterations)/double(total_iterations);
  }
  return 0;
}

◆ GetControl()

double GetControl ( void )

inline

Definition at line 108 of file FGTrimAxis.h.

108{ return control_value; }

◆ GetControlMax()

double GetControlMax ( void )

inline

Definition at line 117 of file FGTrimAxis.h.

117{ return control_max; }

◆ GetControlMin()

double GetControlMin ( void )

inline

Definition at line 116 of file FGTrimAxis.h.

116{ return control_min; }

◆ GetControlName()

std::string GetControlName ( void )

inline

Definition at line 114 of file FGTrimAxis.h.

114{ return ControlNames[control]; }

◆ GetControlType()

Control GetControlType ( void )

inline

Definition at line 111 of file FGTrimAxis.h.

111{ return control; }

◆ GetIterationLimit()

int GetIterationLimit ( void )

inline

Definition at line 133 of file FGTrimAxis.h.

133{ return max_iterations; }

◆ GetRunCount()

int GetRunCount ( void )

inline

Definition at line 137 of file FGTrimAxis.h.

137{ return total_stability_iterations; }

◆ GetSolverEps()

double GetSolverEps ( void )

inline

Definition at line 130 of file FGTrimAxis.h.

130{ return solver_eps; }

◆ GetStability()

int GetStability ( void )

inline

Definition at line 136 of file FGTrimAxis.h.

136{ return its_to_stable_value; }

◆ GetState()

double GetState ( void )

inline

Definition at line 105 of file FGTrimAxis.h.

105{ getState(); return state_value; }

◆ GetStateName()

std::string GetStateName ( void )

inline

Definition at line 113 of file FGTrimAxis.h.

113{ return StateNames[state]; }

◆ GetStateTarget()

double GetStateTarget ( void )

inline

Definition at line 141 of file FGTrimAxis.h.

141{ return state_target; }

◆ GetStateType()

State GetStateType ( void )

inline

Definition at line 110 of file FGTrimAxis.h.

110{ return state; }

◆ GetTolerance()

double GetTolerance ( void )

inline

Definition at line 128 of file FGTrimAxis.h.

128{ return tolerance; }

◆ InTolerance()

bool InTolerance ( void )

inline

Definition at line 145 of file FGTrimAxis.h.

145{ getState(); return (fabs(state_value) <= tolerance); }

◆ Run()

void Run ( void )

This function iterates through a call to the FGFDMExec::RunIC() function until the desired trimming condition falls inside a tolerance.

Definition at line 248 of file FGTrimAxis.cpp.

                         {
 
  double last_state_value;
  int i;
  setControl();
  //FGLogging log(LogLevel::INFO);
  //log << "FGTrimAxis::Run: " << control_value << "\n";
  i=0;
  bool stable=false;
  while(!stable) {
    i++;
    last_state_value=state_value;
    fdmex->Initialize(fgic);
    fdmex->Run();
    getState();
    if(i > 1) {
      if((fabs(last_state_value - state_value) < tolerance) || (i >= 100) )
        stable=true;
    }
  }
 
  its_to_stable_value=i;
  total_stability_iterations+=its_to_stable_value;
  total_iterations++;
}

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◆ SetControl()

void SetControl ( double value )

inline

Definition at line 107 of file FGTrimAxis.h.

107{ control_value=value; }

◆ SetControlLimits()

void SetControlLimits	(	double	min,
		double	max
	)

inline

Definition at line 122 of file FGTrimAxis.h.

                                                       { 
      control_min=min;
      control_max=max;
  }    

◆ SetControlToMax()

void SetControlToMax ( void )

inline

Definition at line 120 of file FGTrimAxis.h.

120{ control_value=control_max; }

◆ SetControlToMin()

void SetControlToMin ( void )

inline

Definition at line 119 of file FGTrimAxis.h.

119{ control_value=control_min; }

◆ SetIterationLimit()

void SetIterationLimit ( int ii )

inline

Definition at line 134 of file FGTrimAxis.h.

134{ max_iterations=ii; }

◆ SetSolverEps()

void SetSolverEps ( double ff )

inline

Definition at line 131 of file FGTrimAxis.h.

131{ solver_eps=ff; }

◆ SetStateTarget()

void SetStateTarget ( double target )

inline

Definition at line 140 of file FGTrimAxis.h.

140{ state_target=target; }

◆ SetTolerance()

void SetTolerance ( double ff )

inline

Definition at line 127 of file FGTrimAxis.h.

127{ tolerance=ff;}

The documentation for this class was generated from the following files:

Detailed Description

Public Member Functions

Additional Inherited Members

Constructor & Destructor Documentation

◆ FGTrimAxis()

◆ ~FGTrimAxis()

Member Function Documentation

◆ AxisReport()

◆ GetAvgStability()

◆ GetControl()

◆ GetControlMax()

◆ GetControlMin()

◆ GetControlName()

◆ GetControlType()

◆ GetIterationLimit()

◆ GetRunCount()

◆ GetSolverEps()

◆ GetStability()

◆ GetState()

◆ GetStateName()

◆ GetStateTarget()

◆ GetStateType()

◆ GetTolerance()

◆ InTolerance()

◆ Run()

◆ SetControl()

◆ SetControlLimits()

◆ SetControlToMax()

◆ SetControlToMin()

◆ SetIterationLimit()

◆ SetSolverEps()

◆ SetStateTarget()

◆ SetTolerance()