Description

Base class for continuous band track shoes using rigid treads.

Derived classes specify actual template definitions, using different models for the track web.

#include <ChTrackShoeBand.h>

Inheritance diagram for chrono::vehicle::ChTrackShoeBand:

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Collaboration diagram for chrono::vehicle::ChTrackShoeBand:

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

virtual double	GetPitch () const override
	Return the pitch length of the track shoe. More...

virtual void	Initialize (std::shared_ptr< ChBodyAuxRef > chassis, const ChVector<> &location, const ChQuaternion<> &rotation) override
	Initialize this track shoe subsystem. More...

void	WriteTreadVisualizationMesh (const std::string &out_dir)
	Write the procedurally-generated tread body visualization mesh to a Wavefront OBJ file.

void	ExportTreadVisualizationMeshPovray (const std::string &out_dir)
	Export the procedurally-generated tread body visualization mesh as a macro in a PovRay include file.

Public Member Functions inherited from chrono::vehicle::ChTrackShoe
virtual GuidePinType	GetType () const =0
	Return the type of track shoe (guiding pin). More...

size_t	GetIndex () const
	Get the index of this track shoe within its containing track assembly.

std::shared_ptr< ChBody >	GetShoeBody () const
	Get the shoe body.

virtual ChVector	GetTension () const =0
	Get track tension at this track shoe. More...

virtual double	GetHeight () const =0
	Return the height of the track shoe.

virtual ChVehicleGeometry	GetGroundContactGeometry () const
	Return contact geometry and material for interaction with terrain.

void	SetCollide (bool val)
	Turn on/off collision flag for the shoe body.

void	SetIndex (size_t index)
	Set the index of this track shoe within its containing track assembly.

virtual void	Connect (std::shared_ptr< ChTrackShoe > next, ChTrackAssembly assembly, ChChassis chassis, bool ccw)=0
	Connect this track shoe to the specified neighbor. 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.

virtual std::string	GetTemplateName () const =0
	Get the name of the vehicle subsystem template.

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	GetTreadMass () const =0
	Return the mass of the tread body.

virtual double	GetWebMass () const =0
	Return the mass of the web. More...

virtual const ChVector &	GetTreadInertia () const =0
	Return the moments of inertia of the tread body.

virtual const ChVector &	GetWebInertia () const =0
	Return the moments of inertia of the web. More...

virtual const ChVector &	GetGuideBoxDimensions () const =0
	Return the dimensions of the contact box for the guiding pin. More...

virtual double	GetGuideBoxOffsetX () const =0
	Return the offset (in X direction) of the guiding pin.

virtual ChVector	GetLateralContactPoint () const override
	Return the location of the guiding pin center, expressed in the shoe reference frame.

virtual double	GetBeltWidth () const =0
	Return the width of the CB track belt (in the Y direction)

virtual double	GetToothTipLength () const =0
	Return the length of the flat tip of the tread tooth tip (in the X direction)

virtual double	GetToothBaseLength () const =0
	Return the length of the base of the tread tooth (in the X direction) where the tooth circular profile ends.

virtual double	GetToothWidth () const =0
	Return the width of the one of the tooth profile sections of the tread tooth (in the Y direction)

virtual double	GetToothHeight () const =0
	Return the height from the base to the tip of the tread tooth profile (in the Z direction)

virtual double	GetToothArcRadius () const =0
	Return the radius of the tooth profile arc that connects the tooth tip and base lines.

virtual double	GetWebLength () const =0
	Return the combined length of all of the web sections (in the X direction)

virtual double	GetWebThickness () const =0
	Return the thickness of the web section (in the Z direction)

virtual double	GetTreadLength () const =0
	Return the length of the tread below the web area (in the X direction, tread pad for ground contact)

virtual double	GetTreadThickness () const =0
	Return the thickness of the tread below the web area (tread pad for ground contact)

virtual const std::string &	GetTreadVisualizationMeshName () const =0
	Specify the name assigned to the procedurally-generated tread body visualization mesh.

void	AddShoeContact (ChContactMethod contact_method)
	Add contact geometry for the tread body. More...

void	AddShoeVisualization ()
	Add visualization of the tread body, based on primitives corresponding to the contact shapes. More...

Protected Member Functions inherited from chrono::vehicle::ChTrackShoe
	ChTrackShoe (const std::string &name)
	Construct a track shoe subsystem with given name.

Protected Member Functions inherited from chrono::vehicle::ChPart
	ChPart (const std::string &name)
	Construct a vehicle subsystem with the specified name.

virtual void	InitializeInertiaProperties ()=0
	Initialize subsystem inertia properties. More...

virtual void	UpdateInertiaProperties ()=0
	Update subsystem inertia properties. More...

void	AddMass (double &mass)
	Add this subsystem's mass. More...

void	AddInertiaProperties (ChVector<> &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...

Static Protected Member Functions
static ChColor	GetColor (size_t index)
	Get index-specific color (for visualization)

Static Protected Member Functions inherited from chrono::vehicle::ChPart
static void	ExportBodyList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChBody >> bodies)
	Export the list of bodies to the specified JSON document.

static void	ExportShaftList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChShaft >> shafts)
	Export the list of shafts to the specified JSON document.

static void	ExportJointList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChLink >> joints)
	Export the list of joints to the specified JSON document.

static void	ExportCouplesList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChShaftsCouple >> couples)
	Export the list of shaft couples to the specified JSON document.

static void	ExportMarkerList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChMarker >> markers)
	Export the list of markers to the specified JSON document.

static void	ExportLinSpringList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChLinkTSDA >> springs)
	Export the list of translational springs to the specified JSON document.

static void	ExportRotSpringList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChLinkRSDA >> springs)
	Export the list of rotational springs to the specified JSON document.

static void	ExportBodyLoadList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChLoadBodyBody >> loads)
	Export the list of body-body loads to the specified JSON document.

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
ChContactMaterialData	m_tooth_matinfo
	data for contact material for teeth (sprocket interaction)

ChContactMaterialData	m_body_matinfo
	date for contact material for main body (wheel interaction)

ChContactMaterialData	m_pad_matinfo
	data for contact material for pad (ground interaction)

ChContactMaterialData	m_guide_matinfo
	date for contact material for guide pin (wheel interaction)

Protected Attributes inherited from chrono::vehicle::ChTrackShoe
size_t	m_index
	index of this track shoe within its containing track assembly

std::shared_ptr< ChBody >	m_shoe
	handle to the shoe body

Protected Attributes inherited from chrono::vehicle::ChPart
std::string	m_name
	subsystem name

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

Friends
class	ChSprocketBand

class	SprocketBandContactCB

Additional Inherited Members
Static Public Member Functions inherited from chrono::vehicle::ChPart
static ChMatrix33	TransformInertiaMatrix (const ChVector<> &moments, const ChVector<> &products, const ChMatrix33<> &vehicle_rot, const ChMatrix33<> &body_rot)
	Utility function for transforming inertia tensors between centroidal frames. More...

Constructor & Destructor Documentation

◆ ChTrackShoeBand()

chrono::vehicle::ChTrackShoeBand::ChTrackShoeBand ( const std::string & name )

Parameters

[in] name name of the subsystem

Member Function Documentation

◆ AddShoeContact()

void chrono::vehicle::ChTrackShoeBand::AddShoeContact ( ChContactMethod contact_method )

protected

Add contact geometry for the tread body.

Note that this is for contact with wheels, idler, and ground only. This contact geometry does not affect contact with the sprocket.

◆ AddShoeVisualization()

void chrono::vehicle::ChTrackShoeBand::AddShoeVisualization ( )

protected

Add visualization of the tread body, based on primitives corresponding to the contact shapes.

Note that the "primitive" shape for the tread body is a procedurally-generated mesh.

◆ GetGuideBoxDimensions()

virtual const ChVector& chrono::vehicle::ChTrackShoeBand::GetGuideBoxDimensions ( ) const

protectedpure virtual

Return the dimensions of the contact box for the guiding pin.

Note that this is for contact with wheels, idler, and ground only. This contact geometry does not affect contact with the sprocket.

Implemented in chrono::vehicle::m113::M113_TrackShoeBandANCF, chrono::vehicle::m113::M113_TrackShoeBandBushing, chrono::vehicle::TrackShoeBandANCF, and chrono::vehicle::TrackShoeBandBushing.

◆ GetPitch()

double chrono::vehicle::ChTrackShoeBand::GetPitch ( ) const

overridevirtual

Return the pitch length of the track shoe.

This quantity must agree with the pitch of the sprocket gear.

Implements chrono::vehicle::ChTrackShoe.

◆ GetWebInertia()

virtual const ChVector& chrono::vehicle::ChTrackShoeBand::GetWebInertia ( ) const

protectedpure virtual

Return the moments of inertia of the web.

These will be distributed over the specified number of web segments.

Implemented in chrono::vehicle::m113::M113_TrackShoeBandANCF, chrono::vehicle::m113::M113_TrackShoeBandBushing, chrono::vehicle::TrackShoeBandANCF, and chrono::vehicle::TrackShoeBandBushing.

◆ GetWebMass()

virtual double chrono::vehicle::ChTrackShoeBand::GetWebMass ( ) const

protectedpure virtual

Return the mass of the web.

This will be equally distributed over the specified number of web segments.

Implemented in chrono::vehicle::m113::M113_TrackShoeBandANCF, chrono::vehicle::m113::M113_TrackShoeBandBushing, chrono::vehicle::TrackShoeBandANCF, and chrono::vehicle::TrackShoeBandBushing.

◆ Initialize()

void chrono::vehicle::ChTrackShoeBand::Initialize	(	std::shared_ptr< ChBodyAuxRef >	chassis,
		const ChVector<> &	location,
		const ChQuaternion<> &	rotation
	)

overridevirtual

Initialize this track shoe subsystem.

The track shoe is created within the specified system and initialized at the specified location and orientation (expressed in the global frame). This version initializes the bodies of a CB rigid-link track shoe such that the center of the track shoe subsystem is at the specified location and all bodies have the specified orientation.

Parameters

[in]	chassis	handle to the chassis body
[in]	location	location relative to the chassis frame
[in]	rotation	orientation relative to the chassis frame

Implements chrono::vehicle::ChTrackShoe.

Reimplemented in chrono::vehicle::ChTrackShoeBandANCF, and chrono::vehicle::ChTrackShoeBandBushing.

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

/builds/uwsbel/chrono/src/chrono_vehicle/tracked_vehicle/track_shoe/ChTrackShoeBand.h
/builds/uwsbel/chrono/src/chrono_vehicle/tracked_vehicle/track_shoe/ChTrackShoeBand.cpp

Description

Public Member Functions

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Friends

Additional Inherited Members

Constructor & Destructor Documentation

◆ ChTrackShoeBand()

Member Function Documentation

◆ AddShoeContact()

◆ AddShoeVisualization()

◆ GetGuideBoxDimensions()

◆ GetPitch()

◆ GetWebInertia()

◆ GetWebMass()

◆ Initialize()