Description

Simple driveline model.

This template can be used to model a 4WD driveline. It uses a constant front/rear torque split (a value between 0 and 1) and a simple model for Torsen limited-slip differentials.

#include <ChSimpleDriveline.h>

Inheritance diagram for chrono::vehicle::ChSimpleDriveline:

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Collaboration diagram for chrono::vehicle::ChSimpleDriveline:

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Public Member Functions
	ChSimpleDriveline (const std::string &name)

virtual std::string	GetTemplateName () const override
	Get the name of the vehicle subsystem template.

virtual unsigned int	GetNumDrivenAxles () const final override
	Return the number of driven axles.

virtual void	Initialize (std::shared_ptr< ChChassis > chassis, const ChAxleList &axles, const std::vector< int > &driven_axles) override
	Initialize the driveline subsystem. More...

virtual void	Synchronize (double time, const DriverInputs &driver_inputs, double driveshaft_torque) override
	Update the driveline subsystem: apply the specified motor torque. More...

virtual double	GetSpindleTorque (int axle, VehicleSide side) const override
	Get the motor torque to be applied to the specified spindle.

virtual void	Disconnect () override
	Disconnect driveline from driven wheels.

virtual double	GetOutputDriveshaftSpeed () const override
	Return the output driveline speed of the driveshaft. More...

Public Member Functions inherited from chrono::vehicle::ChDrivelineWV
virtual void	LockAxleDifferential (int axle, bool lock)
	Lock/unlock the differential on the specified axle. More...

virtual void	LockCentralDifferential (int which, bool lock)
	Lock/unlock the specified central differential. More...

const std::vector< int > &	GetDrivenAxleIndexes () const
	Get the indexes of the vehicle's axles driven by this driveline subsystem.

Public Member Functions inherited from chrono::vehicle::ChDriveline
void	Initialize (std::shared_ptr< ChChassis > chassis)
	Initialize the driveline.

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 ChFrame &	GetCOMFrame () const
	Get the current subsystem COM frame (relative to and expressed in the subsystem's reference frame). More...

const ChMatrix33 &	GetInertia () const
	Get the current subsystem inertia (relative to the subsystem COM frame). More...

const ChFrame &	GetTransform () 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	AddVisualizationAssets (VisualizationType vis)
	Add visualization assets to this subsystem, for the specified visualization mode.

virtual void	RemoveVisualizationAssets ()
	Remove all visualization assets from 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.

Protected Member Functions
virtual double	GetFrontTorqueFraction () const =0
	Return the front torque fraction [0,1].

virtual double	GetFrontDifferentialMaxBias () const =0
	Return the torque bias ratio for the front differential. More...

virtual double	GetRearDifferentialMaxBias () const =0
	Return the torque bias ratio for the rear differential. More...

Protected Member Functions inherited from chrono::vehicle::ChDrivelineWV
	ChDrivelineWV (const std::string &name)

Protected Member Functions inherited from chrono::vehicle::ChDriveline
	ChDriveline (const std::string &name)

virtual void	InitializeInertiaProperties () override
	Initialize subsystem inertia properties. More...

virtual void	UpdateInertiaProperties () override
	Update subsystem inertia properties. 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...

virtual void	Create (const rapidjson::Document &d)
	Create a vehicle subsystem from JSON data. 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.

Additional Inherited Members
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...

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::ChDrivelineWV
std::vector< int >	m_driven_axles
	indexes of the driven vehicle axles

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< ChPart >	m_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

Member Function Documentation

◆ GetFrontDifferentialMaxBias()

virtual double chrono::vehicle::ChSimpleDriveline::GetFrontDifferentialMaxBias ( ) const

protectedpure virtual

Return the torque bias ratio for the front differential.

This is a simple model of a Torsen limited-slip differential.

Implemented in chrono::vehicle::hmmwv::HMMWV_SimpleDriveline, chrono::vehicle::man::MAN_5t_SimpleDriveline, chrono::vehicle::mrole::mrole_SimpleDriveline, chrono::vehicle::fmtv::FMTV_SimpleDriveline, chrono::vehicle::SimpleDriveline, and chrono::vehicle::generic::Generic_SimpleDriveline.

◆ GetOutputDriveshaftSpeed()

virtual double chrono::vehicle::ChSimpleDriveline::GetOutputDriveshaftSpeed ( ) const

inlineoverridevirtual

Return the output driveline speed of the driveshaft.

This represents the output from the driveline subsystem that is passed to the transmission subsystem.

Implements chrono::vehicle::ChDriveline.

◆ GetRearDifferentialMaxBias()

virtual double chrono::vehicle::ChSimpleDriveline::GetRearDifferentialMaxBias ( ) const

protectedpure virtual

Return the torque bias ratio for the rear differential.

This is a simple model of a Torsen limited-slip differential.

Implemented in chrono::vehicle::hmmwv::HMMWV_SimpleDriveline, chrono::vehicle::man::MAN_5t_SimpleDriveline, chrono::vehicle::mrole::mrole_SimpleDriveline, chrono::vehicle::fmtv::FMTV_SimpleDriveline, chrono::vehicle::SimpleDriveline, and chrono::vehicle::generic::Generic_SimpleDriveline.

◆ Initialize()

void chrono::vehicle::ChSimpleDriveline::Initialize	(	std::shared_ptr< ChChassis >	chassis,
		const ChAxleList &	axles,
		const std::vector< int > &	driven_axles
	)

overridevirtual

Initialize the driveline subsystem.

This function connects this driveline subsystem to the specified axle subsystems.

Parameters

chassis	associated chassis subsystem
axles	list of all vehicle axle subsystems
driven_axles	indexes of the driven vehicle axles

Implements chrono::vehicle::ChDrivelineWV.

◆ Synchronize()

void chrono::vehicle::ChSimpleDriveline::Synchronize	(	double	time,
		const DriverInputs &	driver_inputs,
		double	driveshaft_torque
	)

overridevirtual

Update the driveline subsystem: apply the specified motor torque.

This represents the input to the driveline subsystem from the powertrain system.

Parameters

time	current time
driver_inputs	current driver inputs
driveshaft_torque	input transmission torque

Implements chrono::vehicle::ChDriveline.

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

/builds/uwsbel/chrono/src/chrono_vehicle/wheeled_vehicle/driveline/ChSimpleDriveline.h
/builds/uwsbel/chrono/src/chrono_vehicle/wheeled_vehicle/driveline/ChSimpleDriveline.cpp