JSBSim Flight Dynamics Model
1.2.0 (05 Nov 2023)
An Open Source Flight Dynamics and Control Software Library in C++
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Manages ground reactions modeling.
Maintains a list of landing gear and ground contact points, all instances of FGLGear. Sums their forces and moments so that these may be provided to FGPropagate. Parses the <ground_reactions> section of the aircraft configuration file.
Definition at line 79 of file FGGroundReactions.h.
#include <FGGroundReactions.h>
Public Member Functions | |
FGGroundReactions (FGFDMExec *) | |
double | GetDsCmd (void) const |
Gets the steering command. More... | |
double | GetForces (int idx) const |
const FGColumnVector3 & | GetForces (void) const |
auto | GetGearUnit (int gear) const |
Gets a gear instance. More... | |
std::string | GetGroundReactionStrings (std::string delimeter) const |
std::string | GetGroundReactionValues (std::string delimeter) const |
double | GetMoments (int idx) const |
const FGColumnVector3 & | GetMoments (void) const |
std::vector< LagrangeMultiplier * > * | GetMultipliersList (void) |
int | GetNumGearUnits (void) const |
Gets the number of gears. More... | |
bool | GetWOW (void) const |
bool | InitModel (void) override |
bool | Load (Element *el) override |
void | RegisterLagrangeMultiplier (LagrangeMultiplier *lmult) |
bool | Run (bool Holding) override |
Runs the Ground Reactions model; called by the Executive Can pass in a value indicating if the executive is directing the simulation to Hold. More... | |
void | SetDsCmd (double cmd) |
Sets the steering command. More... | |
Public Member Functions inherited from FGModel | |
FGModel (FGFDMExec *) | |
Constructor. | |
~FGModel () override | |
Destructor. | |
virtual SGPath | FindFullPathName (const SGPath &path) const |
FGFDMExec * | GetExec (void) |
const std::string & | GetName (void) |
unsigned int | GetRate (void) |
Get the output rate for the model in frames. | |
bool | InitModel (void) override |
void | SetPropertyManager (std::shared_ptr< FGPropertyManager > fgpm) |
void | SetRate (unsigned int tt) |
Set the ouput rate for the model in frames. | |
Public Member Functions inherited from FGModelFunctions | |
std::string | GetFunctionStrings (const std::string &delimeter) const |
Gets the strings for the current set of functions. More... | |
std::string | GetFunctionValues (const std::string &delimeter) const |
Gets the function values. More... | |
std::shared_ptr< FGFunction > | GetPreFunction (const std::string &name) |
Get one of the "pre" function. More... | |
bool | Load (Element *el, FGFDMExec *fdmex, std::string prefix="") |
void | PostLoad (Element *el, FGFDMExec *fdmex, std::string prefix="") |
void | PreLoad (Element *el, FGFDMExec *fdmex, std::string prefix="") |
void | RunPostFunctions (void) |
void | RunPreFunctions (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 Member Functions inherited from FGSurface | |
FGSurface (FGFDMExec *fdmex) | |
Constructor. | |
void | bind (FGPropertyManager *pm) |
double | GetBumpHeight () |
Returns the height of the bump at the provided offset. | |
double | GetBumpiness (void) |
Gets the normalized bumpiness factor associated with the surface. | |
double | GetMaximumForce (void) |
Gets the maximum force of the surface area. | |
double | GetRollingFFactor (void) |
Gets the rolling friction factor of the surface area. | |
bool | GetSolid (void) |
Gets the surface is a solid flag value. | |
double | GetStaticFFactor (void) |
Gets the static friction factor of the surface area. | |
void | resetValues (void) |
Reset all surface values to a default. | |
void | SetBumpiness (double bump) |
Sets the normalized bumpiness factor associated with the surface. | |
void | SetMaximumForce (double force) |
Sets the maximum force for the surface area. | |
void | SetPosition (const double pt[3]) |
Set the currect position for bumpiness calulcation. | |
void | SetRollingFFactor (double friction) |
Sets the rolling friction factor of the surface area. | |
void | SetSolid (bool solid) |
Sets the surface is a solid flag value. | |
void | SetStaticFFactor (double friction) |
Sets the static friction factor of the surface area. | |
Public Attributes | |
FGLGear::Inputs | in |
Additional Inherited Members | |
Public Types inherited from FGJSBBase | |
enum | { eL = 1 , eM , eN } |
Moments L, M, N. | |
enum | { eP = 1 , eQ , eR } |
Rates P, Q, R. | |
enum | { eU = 1 , eV , eW } |
Velocities U, V, W. | |
enum | { eX = 1 , eY , eZ } |
Positions X, Y, Z. | |
enum | { ePhi = 1 , eTht , ePsi } |
Euler angles Phi, Theta, Psi. | |
enum | { eDrag = 1 , eSide , eLift } |
Stability axis forces, Drag, Side force, Lift. | |
enum | { eRoll = 1 , ePitch , eYaw } |
Local frame orientation Roll, Pitch, Yaw. | |
enum | { eNorth = 1 , eEast , eDown } |
Local frame position North, East, Down. | |
enum | { eLat = 1 , eLong , eRad } |
Locations Radius, Latitude, Longitude. | |
enum | { inNone = 0 , inDegrees , inRadians , inMeters , inFeet } |
Conversion specifiers. | |
Static Public Member Functions inherited from FGJSBBase | |
static const std::string & | GetVersion (void) |
Returns the version number of JSBSim. More... | |
static constexpr double | KelvinToFahrenheit (double kelvin) |
Converts from degrees Kelvin to degrees Fahrenheit. More... | |
static constexpr double | CelsiusToRankine (double celsius) |
Converts from degrees Celsius to degrees Rankine. More... | |
static constexpr double | RankineToCelsius (double rankine) |
Converts from degrees Rankine to degrees Celsius. More... | |
static constexpr double | KelvinToRankine (double kelvin) |
Converts from degrees Kelvin to degrees Rankine. More... | |
static constexpr double | RankineToKelvin (double rankine) |
Converts from degrees Rankine to degrees Kelvin. More... | |
static constexpr double | FahrenheitToCelsius (double fahrenheit) |
Converts from degrees Fahrenheit to degrees Celsius. More... | |
static constexpr double | CelsiusToFahrenheit (double celsius) |
Converts from degrees Celsius to degrees Fahrenheit. More... | |
static constexpr double | CelsiusToKelvin (double celsius) |
Converts from degrees Celsius to degrees Kelvin. More... | |
static constexpr double | KelvinToCelsius (double kelvin) |
Converts from degrees Kelvin to degrees Celsius. More... | |
static constexpr double | FeetToMeters (double measure) |
Converts from feet to meters. More... | |
static bool | EqualToRoundoff (double a, double b) |
Finite precision comparison. More... | |
static bool | EqualToRoundoff (float a, float b) |
Finite precision comparison. More... | |
static bool | EqualToRoundoff (float a, double b) |
Finite precision comparison. More... | |
static bool | EqualToRoundoff (double a, float b) |
Finite precision comparison. More... | |
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 |
Protected Member Functions inherited from FGModel | |
bool | Upload (Element *el, bool preLoad) |
Uploads this model in memory. More... | |
Static Protected Member Functions inherited from FGJSBBase | |
static std::string | CreateIndexedPropertyName (const std::string &Property, int index) |
Protected Attributes inherited from FGModel | |
unsigned int | exe_ctr |
FGFDMExec * | FDMExec |
std::string | Name |
std::shared_ptr< FGPropertyManager > | PropertyManager |
unsigned int | rate |
Protected Attributes inherited from FGModelFunctions | |
FGPropertyReader | LocalProperties |
std::vector< std::shared_ptr< FGFunction > > | PostFunctions |
std::vector< std::shared_ptr< FGFunction > > | PreFunctions |
Protected Attributes inherited from FGSurface | |
double | bumpiness |
bool | isSolid |
double | maximumForce |
double | rollingFFactor |
double | staticFFactor |
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/(fttom*fttom*fttom) |
static constexpr double | in3tom3 = inchtoft*inchtoft*inchtoft/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. More... | |
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__ |
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inline |
Gets the steering command.
Definition at line 113 of file FGGroundReactions.h.
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Gets a gear instance.
gear | index of gear instance |
Definition at line 109 of file FGGroundReactions.h.
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Gets the number of gears.
Definition at line 104 of file FGGroundReactions.h.
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overridevirtual |
Runs the Ground Reactions model; called by the Executive Can pass in a value indicating if the executive is directing the simulation to Hold.
Holding | if true, the executive has been directed to hold the sim from advancing time. Some models may ignore this flag, such as the Input model, which may need to be active to listen on a socket for the "Resume" command to be given. |
Reimplemented from FGModel.
Definition at line 85 of file FGGroundReactions.cpp.
void SetDsCmd | ( | double | cmd | ) |
Sets the steering command.
cmd | steering command in percent |
Definition at line 125 of file FGGroundReactions.cpp.