Detailed Description

Base class for specific thrusting devices such as propellers, nozzles, etc.

reverser angle:

"Reverser angle" as used here is a way to manipulate the thrust vector,
along the thrust axis ONLY, during run time.  This should not be confused
with a thrust vectoring nozzle.  The angle is defined in radians, and is
used thus:  Final_thrust = cosine( reverser_angle ) * unmodified_thrust.  
Therefore a reverser angle of 0 results in no change, and a reverser angle
of 3.14 (pi) results in a completely reversed thrust vector.  An angle of
1.57 (pi/2) results in no thrust at all.

@author Jon Berndt

Definition at line 77 of file FGThruster.h.

#include <FGThruster.h>

Inheritance diagram for FGThruster:

Collaboration diagram for FGThruster:

Classes
struct	Inputs

Public Types
enum	eType { ttNozzle , ttRotor , ttPropeller , ttDirect }

Public Types inherited from FGForce
enum	TransformType { tNone , tWindBody , tLocalBody , tInertialBody , tCustom }

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...

Public Member Functions
	FGThruster (FGFDMExec FDMExec, Element el, int num)
	Constructor.

virtual	~FGThruster ()
	Destructor.

virtual double	Calculate (double tt)

virtual double	GetEngineRPM (void) const

double	GetGearRatio (void)

std::string	GetName (void)

virtual double	GetPowerRequired (void)

double	GetReverserAngle (void) const

virtual double	GetRPM (void) const

double	GetThrust (void) const

virtual std::string	GetThrusterLabels (int id, const std::string &delimeter)

virtual std::string	GetThrusterValues (int id, const std::string &delimeter)

eType	GetType (void)

virtual void	ResetToIC (void)

virtual void	SetEngineRPM (double rpm)

void	SetName (std::string name)

void	SetReverserAngle (double angle)

virtual void	SetRPM (double rpm)

Public Member Functions inherited from FGForce
	FGForce (FGFDMExec *FDMExec)
	Constructor.

virtual	~FGForce ()
	Destructor.

const FGColumnVector3 &	GetActingLocation (void) const

double	GetActingLocationX (void) const

double	GetActingLocationY (void) const

double	GetActingLocationZ (void) const

double	GetAnglesToBody (int axis) const

const FGColumnVector3 &	GetAnglesToBody (void) const

virtual const FGColumnVector3 &	GetBodyForces (void)

double	GetBodyXForce (void) const

double	GetBodyYForce (void) const

double	GetBodyZForce (void) const

const FGColumnVector3 &	GetLocation (void) const

double	GetLocationX (void) const

double	GetLocationY (void) const

double	GetLocationZ (void) const

const FGColumnVector3 &	GetMoments (void) const

double	GetPitch (void) const

TransformType	GetTransformType (void) const

double	GetYaw (void) const

void	SetActingLocation (const FGColumnVector3 &vv)

void	SetActingLocation (double x, double y, double z)
	Acting point of application.

void	SetActingLocationX (double x)

void	SetActingLocationY (double y)

void	SetActingLocationZ (double z)

void	SetAnglesToBody (const FGColumnVector3 &vv)

void	SetAnglesToBody (double broll, double bpitch, double byaw)

void	SetLocation (const FGColumnVector3 &vv)

void	SetLocation (double x, double y, double z)

void	SetLocationX (double x)

void	SetLocationY (double y)

void	SetLocationZ (double z)

void	SetPitch (double pitch)

void	SetTransformType (TransformType ii)

void	SetYaw (double yaw)

const FGMatrix33 &	Transform (void) const

void	UpdateCustomTransformMatrix (void)

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

virtual	~FGJSBBase ()
	Destructor for FGJSBBase.

void	disableHighLighting (void)
	Disables highlighting in the console output.

Public Attributes
struct JSBSim::FGThruster::Inputs	in

Protected Member Functions
virtual void	Debug (int from)

Protected Attributes
int	EngineNum

double	GearRatio

std::string	Name

double	PowerRequired

double	ReverserAngle

double	Thrust

double	ThrustCoeff

eType	Type

Protected Attributes inherited from FGForce
FGFDMExec *	fdmex

std::shared_ptr< FGMassBalance >	MassBalance

FGMatrix33	mT

TransformType	ttype

FGColumnVector3	vActingXYZn

FGColumnVector3	vFn

FGColumnVector3	vMn

FGColumnVector3	vOrient

FGColumnVector3	vXYZn

Additional Inherited Members
Static Public Member Functions inherited from FGJSBBase
static const std::string &	GetVersion (void)
	Returns the version number of JSBSim.

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

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

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

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

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

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

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

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

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

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

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

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

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

static constexpr double	sign (double num)

Static Public Attributes inherited from FGJSBBase
static char	highint [5] = {27, '[', '1', 'm', '\0' }
	highlights text

static char	halfint [5] = {27, '[', '2', 'm', '\0' }
	low intensity text

static char	normint [6] = {27, '[', '2', '2', 'm', '\0' }
	normal intensity text

static char	reset [5] = {27, '[', '0', 'm', '\0' }
	resets text properties

static char	underon [5] = {27, '[', '4', 'm', '\0' }
	underlines text

static char	underoff [6] = {27, '[', '2', '4', 'm', '\0' }
	underline off

static char	fgblue [6] = {27, '[', '3', '4', 'm', '\0' }
	blue text

static char	fgcyan [6] = {27, '[', '3', '6', 'm', '\0' }
	cyan text

static char	fgred [6] = {27, '[', '3', '1', 'm', '\0' }
	red text

static char	fggreen [6] = {27, '[', '3', '2', 'm', '\0' }
	green text

static char	fgdef [6] = {27, '[', '3', '9', 'm', '\0' }
	default text

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	radtodeg = 180. / M_PI

static constexpr double	degtorad = M_PI / 180.

static constexpr double	hptoftlbssec = 550.0

static constexpr double	psftoinhg = 0.014138

static constexpr double	psftopa = 47.88

static constexpr double	fttom = 0.3048

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

static constexpr double	fpstokts = 1.0 / ktstofps

static constexpr double	inchtoft = 1.0/12.0

static constexpr double	m3toft3 = 1.0/(fttomfttomfttom)

static constexpr double	in3tom3 = inchtoftinchtoftinchtoft/m3toft3

static constexpr double	inhgtopa = 3386.38

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.

static constexpr double	lbtoslug = 1.0/slugtolb

static constexpr double	kgtolb = 2.20462

static constexpr double	kgtoslug = 0.06852168

static const std::string	needed_cfg_version = "2.0"

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

Member Enumeration Documentation

◆ eType

enum eType

Definition at line 85 of file FGThruster.h.

85{ttNozzle, ttRotor, ttPropeller, ttDirect};

Constructor & Destructor Documentation

◆ FGThruster()

FGThruster	(	FGFDMExec *	FDMExec,
		Element *	el,
		int	num
	)

Constructor.

Definition at line 55 of file FGThruster.cpp.

                                                               : FGForce(FDMExec)
{
  Element* thruster_element = el->GetParent();
  Element* element;
  FGColumnVector3 location, orientation, pointing;
 
  Type = ttDirect;
  SetTransformType(FGForce::tCustom);
 
  Name = el->GetAttributeValue("name");
 
  GearRatio = 1.0;
  EngineNum = num;
  auto PropertyManager = FDMExec->GetPropertyManager();
 
// Determine the initial location and orientation of this thruster and load the
// thruster with this information.
 
  element = thruster_element->FindElement("location");
  if (element)  location = element->FindElementTripletConvertTo("IN");
  else          cerr << fgred << "      No thruster location found." << reset << endl;
 
  SetLocation(location);
 
  string property_name, base_property_name;
  base_property_name = CreateIndexedPropertyName("propulsion/engine", EngineNum);
 
  property_name = base_property_name + "/x-reference-position";
  PropertyManager->Tie(property_name.c_str(), (FGForce*)this, &FGForce::GetLocationX);
  property_name = base_property_name + "/y-reference-position";
  PropertyManager->Tie(property_name.c_str(), (FGForce*)this, &FGForce::GetLocationY);
  property_name = base_property_name + "/z-reference-position";
  PropertyManager->Tie(property_name.c_str(), (FGForce*)this, &FGForce::GetLocationZ);
  property_name = base_property_name + "/x-position";
  PropertyManager->Tie(property_name.c_str(), (FGForce*)this, &FGForce::GetActingLocationX, &FGForce::SetActingLocationX);
  property_name = base_property_name + "/y-position";
  PropertyManager->Tie(property_name.c_str(), (FGForce*)this, &FGForce::GetActingLocationY, &FGForce::SetActingLocationY);
  property_name = base_property_name + "/z-position";
  PropertyManager->Tie(property_name.c_str(), (FGForce*)this, &FGForce::GetActingLocationZ, &FGForce::SetActingLocationZ);
 
  element = thruster_element->FindElement("pointing");
  if (element)  {
 
    // This defines a fixed nozzle that has no public interface property to gimbal or reverse it.
    pointing = element->FindElementTripletConvertTo("RAD"); // The specification of RAD here is superfluous,
                                                            // and simply precludes a conversion.
    mT.InitMatrix();
    mT(1,1) = pointing(1);
    mT(2,1) = pointing(2);
    mT(3,1) = pointing(3);
 
  } else {
 
    element = thruster_element->FindElement("orient");
    if (element)  orientation = element->FindElementTripletConvertTo("RAD");
 
    SetAnglesToBody(orientation);
    property_name = base_property_name + "/pitch-angle-rad";
    PropertyManager->Tie( property_name.c_str(), (FGForce *)this, &FGForce::GetPitch, &FGForce::SetPitch);
    property_name = base_property_name + "/yaw-angle-rad";
    PropertyManager->Tie( property_name.c_str(), (FGForce *)this, &FGForce::GetYaw, &FGForce::SetYaw);
 
    if (el->GetName() == "direct") // this is a direct thruster. At this time
                                   // only a direct thruster can be reversed.
      {
        property_name = base_property_name + "/reverser-angle-rad";
        PropertyManager->Tie( property_name.c_str(), (FGThruster *)this, &FGThruster::GetReverserAngle,
                              &FGThruster::SetReverserAngle);
      }
 
  }
 
  ResetToIC();
 
  Debug(0);
}

Here is the call graph for this function:

◆ ~FGThruster()

~FGThruster ( )

virtual

Destructor.

Definition at line 134 of file FGThruster.cpp.

{
  Debug(1);
}

Member Function Documentation

◆ Calculate()

virtual double Calculate ( double tt )

inlinevirtual

Reimplemented in FGPropeller, and FGRotor.

Definition at line 87 of file FGThruster.h.

                                      {
       Thrust = cos(ReverserAngle)*tt;
       vFn(1) = Thrust;
       return Thrust;
  }

◆ Debug()

void Debug ( int from )

protectedvirtual

Definition at line 189 of file FGThruster.cpp.

{
  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: FGThruster" << endl;
    if (from == 1) cout << "Destroyed:    FGThruster" << 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
    }
  }
}

◆ GetEngineRPM()

virtual double GetEngineRPM ( void ) const

inlinevirtual

Reimplemented in FGPropeller, and FGRotor.

Definition at line 102 of file FGThruster.h.

102{ return 0.0; };

◆ GetGearRatio()

double GetGearRatio ( void )

inline

Definition at line 103 of file FGThruster.h.

103{return GearRatio; }

◆ GetName()

std::string GetName ( void )

inline

Definition at line 98 of file FGThruster.h.

98{return Name;}

◆ GetPowerRequired()

virtual double GetPowerRequired ( void )

inlinevirtual

Reimplemented in FGPropeller, and FGRotor.

Definition at line 95 of file FGThruster.h.

95{return 0.0;}

◆ GetReverserAngle()

double GetReverserAngle ( void ) const

inline

Definition at line 100 of file FGThruster.h.

100{return ReverserAngle;}

◆ GetRPM()

virtual double GetRPM ( void ) const

inlinevirtual

Reimplemented in FGPropeller, and FGRotor.

Definition at line 101 of file FGThruster.h.

101{ return 0.0; };

◆ GetThrust()

double GetThrust ( void ) const

inline

Definition at line 96 of file FGThruster.h.

96{return Thrust;}

◆ GetThrusterLabels()

string GetThrusterLabels	(	int	id,
		const std::string &	delimeter
	)

virtual

Reimplemented in FGPropeller.

Definition at line 150 of file FGThruster.cpp.

{
  std::ostringstream buf;
 
  buf << Name << " Thrust (engine " << id << " in lbs)";
 
  return buf.str();
}

◆ GetThrusterValues()

string GetThrusterValues	(	int	id,
		const std::string &	delimeter
	)

virtual

Reimplemented in FGPropeller.

Definition at line 161 of file FGThruster.cpp.

{
  std::ostringstream buf;
 
  buf << Thrust;
 
  return buf.str();
}

◆ GetType()

eType GetType ( void )

inline

Definition at line 97 of file FGThruster.h.

97{return Type;}

◆ ResetToIC()

void ResetToIC ( void )

virtual

Reimplemented in FGPropeller.

Definition at line 141 of file FGThruster.cpp.

{
  ReverserAngle = 0.0;
  Thrust = 0.0;
  SetActingLocation(vXYZn);
}

◆ SetEngineRPM()

virtual void SetEngineRPM ( double rpm )

inlinevirtual

Reimplemented in FGPropeller.

Definition at line 94 of file FGThruster.h.

94{};

◆ SetName()

void SetName ( std::string name )

inline

Definition at line 92 of file FGThruster.h.

92{Name = name;}

◆ SetReverserAngle()

void SetReverserAngle ( double angle )

inline

Definition at line 99 of file FGThruster.h.

99{ReverserAngle = angle;}

◆ SetRPM()

virtual void SetRPM ( double rpm )

inlinevirtual

Reimplemented in FGPropeller.

Definition at line 93 of file FGThruster.h.

93{};

Member Data Documentation

◆ EngineNum

int EngineNum

protected

Definition at line 131 of file FGThruster.h.

◆ GearRatio

double GearRatio

protected

Definition at line 128 of file FGThruster.h.

◆ Name

std::string Name

protected

Definition at line 125 of file FGThruster.h.

◆ PowerRequired

double PowerRequired

protected

Definition at line 127 of file FGThruster.h.

◆ ReverserAngle

double ReverserAngle

protected

Definition at line 130 of file FGThruster.h.

◆ Thrust

double Thrust

protected

Definition at line 126 of file FGThruster.h.

◆ ThrustCoeff

double ThrustCoeff

protected

Definition at line 129 of file FGThruster.h.

◆ Type

eType Type

protected

Definition at line 124 of file FGThruster.h.

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

Detailed Description

reverser angle:

Classes

Public Types

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Additional Inherited Members

Member Enumeration Documentation

◆ eType

Constructor & Destructor Documentation

◆ FGThruster()

◆ ~FGThruster()

Member Function Documentation

◆ Calculate()

◆ Debug()

◆ GetEngineRPM()

◆ GetGearRatio()

◆ GetName()

◆ GetPowerRequired()

◆ GetReverserAngle()

◆ GetRPM()

◆ GetThrust()

◆ GetThrusterLabels()

◆ GetThrusterValues()

◆ GetType()

◆ ResetToIC()

◆ SetEngineRPM()

◆ SetName()

◆ SetReverserAngle()

◆ SetRPM()

Member Data Documentation

◆ EngineNum

◆ GearRatio

◆ Name

◆ PowerRequired

◆ ReverserAngle

◆ Thrust

◆ ThrustCoeff

◆ Type