Description

PAC89 tire model from JSON file.

#include <Pac02Tire.h>

Inheritance diagram for chrono::vehicle::Pac02Tire:
Collaboration diagram for chrono::vehicle::Pac02Tire:

Public Member Functions

 Pac02Tire (const std::string &filename)
 
 Pac02Tire (const rapidjson::Document &d)
 
virtual double GetTireMass () const override
 Return the tire mass.
 
virtual ChVector3d GetTireInertia () const override
 Return the tire moments of inertia (in the tire centroidal frame).
 
virtual double GetVisualizationWidth () const override
 Get visualization width.
 
virtual void SetMFParams () override
 Set the parameters in the Pac02 model.
 
virtual void AddVisualizationAssets (VisualizationType vis) override
 Add visualization assets for the rigid tire subsystem.
 
virtual void RemoveVisualizationAssets () override final
 Remove visualization assets for the rigid tire subsystem.
 
- Public Member Functions inherited from chrono::vehicle::ChPac02Tire
 ChPac02Tire (const std::string &name)
 
virtual std::string GetTemplateName () const override
 Get the name of the vehicle subsystem template.
 
virtual double GetRadius () const override
 Get the tire radius.
 
void SetGammaLimit (double gamma_limit)
 Set the limit for camber angle (in degrees). Default: 3 degrees.
 
virtual double GetWidth () const override
 Get the width of the tire.
 
virtual double GetDeflection () const override
 Get the tire deflection.
 
double GetSlipAngle_internal () const
 Get the slip angle used in Pac02 (expressed in radians). More...
 
double GetLongitudinalSlip_internal () const
 Get the longitudinal slip used in Pac89. More...
 
virtual double GetNormalStiffnessForce (double depth) const override
 Return the vertical tire stiffness contribution to the normal force.
 
virtual double GetNormalDampingForce (double depth, double velocity) const override
 Return the vertical tire damping contribution to the normal force.
 
double GetMuRoad ()
 
double GetLongitudinalGripSaturation ()
 
double GetLateralGripSaturation ()
 
- Public Member Functions inherited from chrono::vehicle::ChForceElementTire
virtual TerrainForce ReportTireForce (ChTerrain *terrain) const override
 Report the tire force and moment. More...
 
virtual TerrainForce ReportTireForceLocal (ChTerrain *terrain, ChCoordsys<> &tire_frame) const override
 Report the tire forces expressed in the tire frame. More...
 
const ContactDataReportTireContactData () const
 Report current tire-terrain contact information. More...
 
void SetVerbose (bool verbose)
 Enable/disable information terminal output (default: false).
 
- Public Member Functions inherited from chrono::vehicle::ChTire
void SetStepsize (double val)
 Set the value of the integration step size for the underlying dynamics (if applicable). More...
 
double GetStepsize () const
 Get the current value of the integration step size.
 
void SetCollisionType (CollisionType collision_type)
 Set the collision type for tire-terrain interaction. More...
 
void SetPressure (double pressure)
 Set the internal tire pressure [Pa]. More...
 
double GetPressure () const
 Get the internal tire pressure [Pa].
 
double GetSlipAngle () const
 Return the tire slip angle calculated based on the current state of the associated wheel body. More...
 
double GetLongitudinalSlip () const
 Return the tire longitudinal slip calculated based on the current state of the associated wheel body. More...
 
double GetCamberAngle () const
 Return the tire camber angle calculated based on the current state of the associated wheel body. More...
 
const std::string & GetMeshFilename () const
 Get the name of the Wavefront file with tire visualization mesh. More...
 
- Public Member Functions inherited from chrono::vehicle::ChPart
const std::string & GetName () const
 Get the name identifier for this subsystem.
 
void SetName (const std::string &name)
 Set the name identifier for this subsystem.
 
bool IsInitialized () const
 Return flag indicating whether or not the part is fully constructed.
 
double GetMass () const
 Get the subsystem mass. More...
 
const ChFrameGetCOMFrame () const
 Get the current subsystem COM frame (relative to and expressed in the subsystem's reference frame). More...
 
const ChMatrix33GetInertia () const
 Get the current subsystem inertia (relative to the subsystem COM frame). More...
 
const ChFrameGetTransform () const
 Get the current subsystem position relative to the global frame. More...
 
void SetVisualizationType (VisualizationType vis)
 Set the visualization mode for this subsystem.
 
virtual void SetOutput (bool state)
 Enable/disable output for this subsystem.
 
bool OutputEnabled () const
 Return the output state for this subsystem.
 
virtual void ExportComponentList (rapidjson::Document &jsonDocument) const
 Export this subsystem's component list to the specified JSON object. More...
 
virtual void Output (ChVehicleOutput &database) const
 Output data for this subsystem's component list to the specified database.
 

Additional Inherited Members

- Public Types inherited from chrono::vehicle::ChTire
enum  CollisionType { SINGLE_POINT, FOUR_POINTS, ENVELOPE }
 
- Static Public Member Functions inherited from chrono::vehicle::ChTire
static ChVector3d EstimateInertia (double tire_width, double aspect_ratio, double rim_diameter, double tire_mass, double t_factor=2)
 Utility function for estimating the tire moments of inertia. More...
 
- Static Public Member Functions inherited from chrono::vehicle::ChPart
static ChMatrix33 TransformInertiaMatrix (const ChVector3d &moments, const ChVector3d &products, const ChMatrix33<> &vehicle_rot, const ChMatrix33<> &body_rot)
 Utility function for transforming inertia tensors between centroidal frames. More...
 
- Protected Member Functions inherited from chrono::vehicle::ChPac02Tire
double CalcMx (double Fy, double Fz, double gamma)
 
double CalcMy (double Fx, double Fz, double gamma)
 
void CalcFxyMz (double &Fx, double &Fy, double &Mz, double kappa, double alpha, double Fz, double gamma)
 
double CalcSigmaK (double Fz)
 
double CalcSigmaA (double Fz)
 
void CombinedCoulombForces (double &fx, double &fy, double fz)
 
void SetMFParamsByFile (const std::string &tirFileName)
 
void LoadSectionUnits (FILE *fp)
 
void LoadSectionModel (FILE *fp)
 
void LoadSectionDimension (FILE *fp)
 
void LoadSectionVertical (FILE *fp)
 
void LoadSectionScaling (FILE *fp)
 
void LoadSectionLongitudinal (FILE *fp)
 
void LoadSectionOverturning (FILE *fp)
 
void LoadSectionLateral (FILE *fp)
 
void LoadSectionRolling (FILE *fp)
 
void LoadSectionConditions (FILE *fp)
 
void LoadSectionAligning (FILE *fp)
 
void LoadVerticalTable (FILE *fp)
 
void LoadBottomingTable (FILE *fp)
 
bool FindSectionStart (const std::string &sectName, FILE *fp)
 
virtual void Initialize (std::shared_ptr< ChWheel > wheel) override
 Initialize this tire by associating it to the specified wheel.
 
virtual void Synchronize (double time, const ChTerrain &terrain) override
 Update the state of this tire system at the current time. More...
 
virtual void Advance (double step) override
 Advance the state of this tire by the specified time step.
 
- Protected Member Functions inherited from chrono::vehicle::ChForceElementTire
 ChForceElementTire (const std::string &name)
 Construct a tire with the specified name.
 
virtual TerrainForce GetTireForce () const override
 Get the tire force and moment. More...
 
- Protected Member Functions inherited from chrono::vehicle::ChTire
 ChTire (const std::string &name)
 Construct a tire subsystem with given name.
 
void CalculateKinematics (const WheelState &wheel_state, const ChCoordsys<> &tire_frame)
 Calculate kinematics quantities based on the given state of the associated wheel body. More...
 
double GetOffset () const
 Get offset from spindle center. More...
 
std::shared_ptr< ChVisualShapeTriangleMeshAddVisualizationMesh (const std::string &mesh_file_left, const std::string &mesh_file_right)
 Add mesh visualization to the body associated with this tire (a wheel spindle body). More...
 
- Protected Member Functions inherited from chrono::vehicle::ChPart
 ChPart (const std::string &name)
 Construct a vehicle subsystem with the specified name.
 
void AddMass (double &mass)
 Add this subsystem's mass. More...
 
void AddInertiaProperties (ChVector3d &com, ChMatrix33<> &inertia)
 Add this subsystem's inertia properties. More...
 
void ExportBodyList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChBody >> bodies) const
 Export the list of bodies to the specified JSON document.
 
void ExportShaftList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChShaft >> shafts) const
 Export the list of shafts to the specified JSON document.
 
void ExportJointList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChLink >> joints) const
 Export the list of joints to the specified JSON document.
 
void ExportCouplesList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChShaftsCouple >> couples) const
 Export the list of shaft couples to the specified JSON document.
 
void ExportMarkerList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChMarker >> markers) const
 Export the list of markers to the specified JSON document.
 
void ExportLinSpringList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChLinkTSDA >> springs) const
 Export the list of translational springs to the specified JSON document.
 
void ExportRotSpringList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChLinkRSDA >> springs) const
 Export the list of rotational springs to the specified JSON document.
 
void ExportBodyLoadList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChLoadBodyBody >> loads) const
 Export the list of body-body loads to the specified JSON document.
 
- Static Protected Member Functions inherited from chrono::vehicle::ChTire
static bool DiscTerrainCollision (CollisionType method, const ChTerrain &terrain, const ChVector3d &disc_center, const ChVector3d &disc_normal, double disc_radius, double width, const ChFunctionInterp &areaDep, ChCoordsys<> &contact, double &depth, float &mu)
 Perform disc-terrain collision detection, using the specified method. More...
 
static void ConstructAreaDepthTable (double disc_radius, ChFunctionInterp &areaDep)
 Utility function to construct a loopkup table for penetration depth as function of intersection area, for a given tire radius. More...
 
static bool DiscTerrainCollision1pt (const ChTerrain &terrain, const ChVector3d &disc_center, const ChVector3d &disc_normal, double disc_radius, ChCoordsys<> &contact, double &depth, float &mu)
 Perform disc-terrain collision detection. More...
 
static bool DiscTerrainCollision4pt (const ChTerrain &terrain, const ChVector3d &disc_center, const ChVector3d &disc_normal, double disc_radius, double width, ChCoordsys<> &contact, double &depth, float &mu)
 Perform disc-terrain collision detection considering the curvature of the road surface. More...
 
static bool DiscTerrainCollisionEnvelope (const ChTerrain &terrain, const ChVector3d &disc_center, const ChVector3d &disc_normal, double disc_radius, double width, const ChFunctionInterp &areaDep, ChCoordsys<> &contact, double &depth, float &mu)
 Collsion algorithm based on a paper of J. More...
 
- Static Protected Member Functions inherited from chrono::vehicle::ChPart
static void RemoveVisualizationAssets (std::shared_ptr< ChPhysicsItem > item)
 Erase all visual shapes from the visual model associated with the specified physics item (if any).
 
static void RemoveVisualizationAsset (std::shared_ptr< ChPhysicsItem > item, std::shared_ptr< ChVisualShape > shape)
 Erase the given shape from the visual model associated with the specified physics item (if any).
 
- Protected Attributes inherited from chrono::vehicle::ChPac02Tire
ChFunctionInterp m_bott_map
 
double m_gamma_limit
 limit camber angle
 
double m_mu0
 Road friction at tire test conditions.
 
double m_vcoulomb
 
double m_frblend_begin
 
double m_frblend_end
 
VehicleSide m_measured_side
 
bool m_allow_mirroring
 
bool m_tire_conditions_found = false
 
bool m_vertical_table_found = false
 
bool m_bottoming_table_found = false
 
bool m_use_friction_ellipsis = true
 
double m_g = 9.81
 
unsigned int m_use_mode
 
MFCoeff m_par
 
TireStates m_states
 
- Protected Attributes inherited from chrono::vehicle::ChForceElementTire
ContactData m_data
 tire-terrain collision information
 
TerrainForce m_tireforce
 tire forces (in tire contact frame)
 
ChFunctionInterp m_areaDep
 lookup table for estimation of penetration depth from intersection area
 
std::shared_ptr< ChVisualShapem_cyl_shape
 visualization cylinder asset
 
bool m_verbose
 verbose output
 
- Protected Attributes inherited from chrono::vehicle::ChTire
std::shared_ptr< ChWheelm_wheel
 associated wheel subsystem
 
double m_stepsize
 tire integration step size (if applicable)
 
double m_pressure
 internal tire pressure
 
CollisionType m_collision_type
 method used for tire-terrain collision
 
std::string m_vis_mesh_file
 name of OBJ file for visualization of this tire (may be empty)
 
double m_slip_angle
 
double m_longitudinal_slip
 
double m_camber_angle
 
- Protected Attributes inherited from chrono::vehicle::ChPart
std::string m_name
 subsystem name
 
bool m_initialized
 specifies whether ot not the part is fully constructed
 
bool m_output
 specifies whether or not output is generated for this subsystem
 
std::shared_ptr< ChPartm_parent
 parent subsystem (empty if parent is vehicle)
 
double m_mass
 subsystem mass
 
ChMatrix33 m_inertia
 inertia tensor (relative to subsystem COM)
 
ChFrame m_com
 COM frame (relative to subsystem reference frame)
 
ChFrame m_xform
 subsystem frame expressed in the global frame
 

The documentation for this class was generated from the following files:
  • /builds/uwsbel/chrono/src/chrono_vehicle/wheeled_vehicle/tire/Pac02Tire.h
  • /builds/uwsbel/chrono/src/chrono_vehicle/wheeled_vehicle/tire/Pac02Tire.cpp