Recursive newton euler inverse dynamics solver. More...

#include <chainidsolver_recursive_newton_euler.hpp>

Inheritance diagram for KDL::ChainIdSolver_RNE:

Public Member Functions
	ChainIdSolver_RNE (const Chain &chain, Vector grav)
	~ChainIdSolver_RNE ()
int	CartToJnt (const JntArray &q, const JntArray &q_dot, const JntArray &q_dotdot, const Wrenches &f_ext, JntArray &torques)
virtual void	updateInternalDataStructures ()
Public Member Functions inherited from KDL::SolverI
	SolverI ()
	Initialize latest error to E_NOERROR.
virtual	~SolverI ()
virtual int	getError () const
	Return the latest error.
virtual const char *	strError (const int error) const

Additional Inherited Members
Public Types inherited from KDL::SolverI
enum	{ E_DEGRADED = +1 , E_NOERROR = 0 , E_NO_CONVERGE = -1 , E_UNDEFINED = -2 , E_NOT_UP_TO_DATE = -3 , E_SIZE_MISMATCH = -4 , E_MAX_ITERATIONS_EXCEEDED = -5 , E_OUT_OF_RANGE = -6 , E_NOT_IMPLEMENTED = -7 , E_SVD_FAILED = -8 }
Protected Attributes inherited from KDL::SolverI
int	error
	Latest error, initialized to E_NOERROR in constructor.

Detailed Description

Recursive newton euler inverse dynamics solver.

The algorithm implementation is based on the book "Rigid Body Dynamics Algorithms" of Roy Featherstone, 2008 (ISBN:978-0-387-74314-1) See page 96 for the pseudo-code.

It calculates the torques for the joints, given the motion of the joints (q,qdot,qdotdot), external forces on the segments (expressed in the segments reference frame) and the dynamical parameters of the segments.

Constructor & Destructor Documentation

◆ ChainIdSolver_RNE()

KDL::ChainIdSolver_RNE::ChainIdSolver_RNE	(	const Chain &	chain,
		Vector	grav )

Constructor for the solver, it will allocate all the necessary memory

Parameters

chain	The kinematic chain to calculate the inverse dynamics for, an internal copy will be made.
grav	The gravity vector to use during the calculation.

◆ ~ChainIdSolver_RNE()

KDL::ChainIdSolver_RNE::~ChainIdSolver_RNE ( )

inline

Member Function Documentation

◆ CartToJnt()

int KDL::ChainIdSolver_RNE::CartToJnt	(	const JntArray &	q,
		const JntArray &	q_dot,
		const JntArray &	q_dotdot,
		const Wrenches &	f_ext,
		JntArray &	torques )

virtual

Function to calculate from Cartesian forces to joint torques. Input parameters;

Parameters

q	The current joint positions
q_dot	The current joint velocities
q_dotdot	The current joint accelerations
f_ext	The external forces (no gravity) on the segments Output parameters:
torques	the resulting torques for the joints

Implements KDL::ChainIdSolver.

◆ updateInternalDataStructures()

virtual void KDL::ChainIdSolver_RNE::updateInternalDataStructures ( )

virtual

Update the internal data structures. This is required if the number of segments or number of joints of a chain/tree have changed. This provides a single point of contact for solver memory allocations.

Implements KDL::SolverI.

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

build/orocos_kdl_install/include/kdl/chainidsolver_recursive_newton_euler.hpp

Public Member Functions