Description

Definition of a suspension test rig.

#include <ChTrackTestRig.h>

Inheritance diagram for chrono::vehicle::ChTrackTestRig:

Collaboration diagram for chrono::vehicle::ChTrackTestRig:

[legend]

Public Member Functions
	ChTrackTestRig ()
	Default constructor.

	ChTrackTestRig (const std::string &filename, bool create_track=true, ChMaterialSurface::ContactMethod contact_method=ChMaterialSurface::NSC)
	Construct a test rig from specified track assembly JSON file. More...

	ChTrackTestRig (std::shared_ptr< ChTrackAssembly > assembly, bool create_track=true, ChMaterialSurface::ContactMethod contact_method=ChMaterialSurface::NSC)
	Construct a test rig using the specified track assembly and subsystem locations. More...

	~ChTrackTestRig ()
	Destructor.

void	SetDriver (std::shared_ptr< ChDriverTTR > driver)
	Set driver system.

void	SetInitialRideHeight (double height)
	Set the initial ride height (relative to the sprocket reference frame). More...

void	SetDisplacementLimit (double limit)
	Set the limits for post displacement (same for jounce and rebound). More...

void	SetDisplacementDelay (double delay)
	Set time delay before applying post displacement. More...

void	SetMaxTorque (double val)
	Set maximum sprocket torque.

void	SetSprocketVisualizationType (VisualizationType vis)
	Set visualization type for the sprocket subsystem (default: PRIMITIVES).

void	SetIdlerVisualizationType (VisualizationType vis)
	Set visualization type for the idler subsystem (default: PRIMITIVES).

void	SetRoadWheelAssemblyVisualizationType (VisualizationType vis)
	Set visualization type for the road-wheel assembly subsystem (default: PRIMITIVES).

void	SetRoadWheelVisualizationType (VisualizationType vis)
	Set visualization type for the road-wheel subsystem (default: PRIMITIVES).

void	SetTrackShoeVisualizationType (VisualizationType vis)
	Set visualization type for the track shoe subsystems (default: PRIMITIVES).

void	SetDriverLogFilename (const std::string &filename)
	Set filename for optional driver log.

void	SetTrackAssemblyOutput (bool state)
	Enable/disable output for the track assembly. More...

void	Initialize ()
	Initialize this track test rig.

virtual void	Advance (double step) override
	Advance the state of the track test rig by the specified time step.

void	SetCollide (int flags)
	Set collision flags for the various subsystems. More...

double	GetThrottleInput () const

double	GetDisplacementInput (int index)

std::string	GetDriverMessage () const

double	GetActuatorDisp (int index)

double	GetActuatorForce (int index)

double	GetActuatorMarkerDist (int index)

double	GetMass () const
	Get the rig total mass. More...

std::shared_ptr< ChTrackAssembly >	GetTrackAssembly () const
	Get the track assembly subsystem.

double	GetRideHeight () const
	Get current ride height (relative to the chassis reference frame). More...

void	LogDriverInputs ()
	Log current driver inputs.

virtual void	LogConstraintViolations () override
	Log current constraint violations.

void	SetPlotOutput (double output_step)
	Enable/disable data collection for plot generation (default: false). More...

virtual void	PlotOutput (const std::string &out_dir, const std::string &out_name)
	Plot collected data. More...

Public Member Functions inherited from chrono::vehicle::ChVehicle
virtual	~ChVehicle ()
	Destructor.

const std::string &	GetName () const
	Get the name identifier for this vehicle.

void	SetName (const std::string &name)
	Set the name identifier for this vehicle.

ChSystem *	GetSystem ()
	Get a pointer to the Chrono ChSystem.

double	GetChTime () const
	Get the current simulation time of the underlying ChSystem.

std::shared_ptr< ChChassis >	GetChassis () const
	Get a handle to the vehicle's chassis subsystem.

std::shared_ptr< ChBodyAuxRef >	GetChassisBody () const
	Get a handle to the vehicle's chassis body.

virtual std::shared_ptr< ChPowertrain >	GetPowertrain () const
	Get the powertrain attached to this vehicle.

const ChVector &	GetVehiclePos () const
	Get the vehicle location. More...

const ChQuaternion &	GetVehicleRot () const
	Get the vehicle orientation. More...

double	GetVehicleSpeed () const
	Get the vehicle speed. More...

double	GetVehicleSpeedCOM () const
	Get the speed of the chassis COM. More...

ChVector	GetVehiclePointLocation (const ChVector<> &locpos) const
	Get the global position of the specified point. More...

ChVector	GetVehiclePointVelocity (const ChVector<> &locpos) const
	Get the global velocity of the specified point. More...

ChVector	GetVehicleAcceleration (const ChVector<> &locpos) const
	Get the acceleration at the specified point. More...

ChVector	GetDriverPos () const
	Get the global location of the driver.

void	SetOutput (ChVehicleOutput::Type type, const std::string &out_dir, const std::string &out_name, double output_step)
	Enable output for this vehicle system. More...

void	SetChassisVisualizationType (VisualizationType vis)
	Set visualization mode for the chassis subsystem.

void	SetChassisCollide (bool state)
	Enable/disable collision for the chassis subsystem. More...

virtual void	SetChassisVehicleCollide (bool state)
	Enable/disable collision between the chassis and all other vehicle subsystems. More...

void	SetChassisOutput (bool state)
	Enable/disable output from the chassis subsystem.

Additional Inherited Members
Protected Member Functions inherited from chrono::vehicle::ChVehicle
	ChVehicle (const std::string &name, ChMaterialSurface::ContactMethod contact_method=ChMaterialSurface::NSC)
	Construct a vehicle system with an underlying ChSystem. More...

	ChVehicle (const std::string &name, ChSystem *system)
	Construct a vehicle system using the specified ChSystem. More...

Static Protected Member Functions inherited from chrono::vehicle::ChVehicle
template<typename T >
static bool	AnyOutput (const std::vector< std::shared_ptr< T >> &list)
	Utility function for testing if any subsystem in a list generates output.

Protected Attributes inherited from chrono::vehicle::ChVehicle
std::string	m_name
	vehicle name

ChSystem *	m_system
	pointer to the Chrono system

bool	m_ownsSystem
	true if system created at construction

bool	m_output
	generate ouput for this vehicle system

ChVehicleOutput *	m_output_db
	vehicle output database

double	m_output_step
	output time step

double	m_next_output_time
	time for next output

int	m_output_frame
	current output frame

std::shared_ptr< ChChassis >	m_chassis
	handle to the chassis subsystem

Constructor & Destructor Documentation

◆ ChTrackTestRig() [1/2]

chrono::vehicle::ChTrackTestRig::ChTrackTestRig	(	const std::string &	filename,
		bool	create_track = `true`,
		ChMaterialSurface::ContactMethod	contact_method = `ChMaterialSurface::NSC`
	)

Construct a test rig from specified track assembly JSON file.

Parameters

[in]	filename	JSON file with test rig specification
[in]	create_track	include track shoes?
[in]	contact_method	contact method

◆ ChTrackTestRig() [2/2]

chrono::vehicle::ChTrackTestRig::ChTrackTestRig	(	std::shared_ptr< ChTrackAssembly >	assembly,
		bool	create_track = `true`,
		ChMaterialSurface::ContactMethod	contact_method = `ChMaterialSurface::NSC`
	)

Construct a test rig using the specified track assembly and subsystem locations.

Parameters

[in]	assembly	handle to the track assembly
[in]	create_track	include track shoes?
[in]	contact_method	contact method

Member Function Documentation

◆ GetMass()

double chrono::vehicle::ChTrackTestRig::GetMass ( ) const

Get the rig total mass.

This is simply the mass of the track subsystem.

◆ GetRideHeight()

double chrono::vehicle::ChTrackTestRig::GetRideHeight ( ) const

Get current ride height (relative to the chassis reference frame).

This estimate uses the average of the left and right posts.

◆ PlotOutput()

void chrono::vehicle::ChTrackTestRig::PlotOutput	(	const std::string &	out_dir,
		const std::string &	out_name
	)

virtual

Plot collected data.

When called (typically at the end of the simulation loop), the collected data is saved in ASCII format in a file with the specified name (and 'txt' extension) in the specified output directory. If the Chrono::Postprocess module is available (with gnuplot support), selected plots are generated.
Collected data includes:

[col 1] time (s)
[col 2-4] sprocket location (m)
[col 5-7] idler location (m)
[col 8-10] road wheel 1 location (m)
[col 11-13] road wheel 2 location (m)
... ...

◆ SetCollide()

void chrono::vehicle::ChTrackTestRig::SetCollide ( int flags )

inline

Set collision flags for the various subsystems.

By default, collision is enabled for sprocket, idler, road wheels, and track shoes.

◆ SetDisplacementDelay()

void chrono::vehicle::ChTrackTestRig::SetDisplacementDelay ( double delay )

inline

Set time delay before applying post displacement.

Default value: 0

◆ SetDisplacementLimit()

void chrono::vehicle::ChTrackTestRig::SetDisplacementLimit ( double limit )

inline

Set the limits for post displacement (same for jounce and rebound).

Default value: 0

◆ SetInitialRideHeight()

void chrono::vehicle::ChTrackTestRig::SetInitialRideHeight ( double height )

inline

Set the initial ride height (relative to the sprocket reference frame).

If not specified, the reference height is the track assembly design configuration.

◆ SetPlotOutput()

void chrono::vehicle::ChTrackTestRig::SetPlotOutput ( double output_step )

Enable/disable data collection for plot generation (default: false).

See PlotOutput details on data collected.

◆ SetTrackAssemblyOutput()

void chrono::vehicle::ChTrackTestRig::SetTrackAssemblyOutput ( bool state )

Enable/disable output for the track assembly.

Description

Public Member Functions

Additional Inherited Members

Constructor & Destructor Documentation

◆ ChTrackTestRig() [1/2]

◆ ChTrackTestRig() [2/2]

Member Function Documentation

◆ GetMass()

◆ GetRideHeight()

◆ PlotOutput()

◆ SetCollide()

◆ SetDisplacementDelay()

◆ SetDisplacementLimit()

◆ SetInitialRideHeight()

◆ SetPlotOutput()

◆ SetTrackAssemblyOutput()