#include <chainiksolver_vel_pinv_mimic.hpp>

Inheritance diagram for KDL::ChainIkSolverVel_pinv_mimic:

Public Member Functions
virtual int	CartToJnt (const JntArray &q_in, const Twist &v_in, JntArray &qdot_out)
virtual int	CartToJnt (const JntArray &q_init, const FrameVel &v_in, JntArrayVel &q_out)
virtual int	CartToJntRedundant (const JntArray &q_in, const Twist &v_in, JntArray &qdot_out)
	ChainIkSolverVel_pinv_mimic (const Chain &chain, int num_mimic_joints=0, int num_redundant_joints=0, bool position_ik=false, double eps=0.00001, int maxiter=150)
void	lockRedundantJoints ()
bool	setMimicJoints (const std::vector< kdl_kinematics_plugin::JointMimic > &_mimic_joints)
	Set a vector of indices that map each (and every) joint in the chain onto the corresponding joint in a reduced set of joints that do not include the mimic joints. This vector must be of size chain.getNrOfJoints(). E.g. if an arm has 7 joints: j0 to j6. Say j2 mimics (follows) j0. Then, mimic_joints should be: [0 1 0 3 4 5 6].
bool	setRedundantJointsMapIndex (const std::vector< unsigned int > &redundant_joints_map_index)
	Set a mapping between a reduced set of joints (numbering either 6 or 3) and the full set of active (i.e excluding the mimic joints) DOFs in the robot. As an example, consider an arm with 7 joints: j0 to j6. If j2 represents the redundancy, then redundant_joints_map_index will be a 6 dimensional vector - [0 1 3 4 5 6], i.e. joint_value_full(redundant_joints_map_index[i]) = joint_value_reduced(i), for i=0,...5.
void	unlockRedundantJoints ()
	~ChainIkSolverVel_pinv_mimic ()
Private Member Functions
bool	jacToJacLocked (const Jacobian &jac, Jacobian &jac_locked)
bool	jacToJacReduced (const Jacobian &jac, Jacobian &jac_mimic)
Private Attributes
const Chain	chain
double	eps
Jacobian	jac
Jacobian	jac_locked
Jacobian	jac_reduced
ChainJntToJacSolver	jnt2jac
std::vector< unsigned int >	locked_joints_map_index
int	maxiter
std::vector < kdl_kinematics_plugin::JointMimic >	mimic_joints_
int	num_mimic_joints
unsigned int	num_redundant_joints
bool	position_ik
JntArray	qdot_out_locked
JntArray	qdot_out_reduced
JntArray	qdot_out_reduced_locked
bool	redundant_joints_locked
JntArray	S
Eigen::VectorXd	S_locked
Eigen::VectorXd	S_translate
Eigen::VectorXd	S_translate_locked
SVD_HH	svd
JntArray	tmp
Eigen::VectorXd	tmp_locked
Eigen::VectorXd	tmp_translate
Eigen::VectorXd	tmp_translate_locked
std::vector< JntArray >	U
Eigen::MatrixXd	U_locked
Eigen::MatrixXd	U_translate
Eigen::MatrixXd	U_translate_locked
std::vector< JntArray >	V
Eigen::MatrixXd	V_locked
Eigen::MatrixXd	V_translate
Eigen::MatrixXd	V_translate_locked

Detailed Description

Implementation of a inverse velocity kinematics algorithm based on the generalize pseudo inverse to calculate the velocity transformation from Cartesian to joint space of a general KDL::Chain. It uses a svd-calculation based on householders rotations.

Definition at line 47 of file chainiksolver_vel_pinv_mimic.hpp.

Constructor & Destructor Documentation

KDL::ChainIkSolverVel_pinv_mimic::ChainIkSolverVel_pinv_mimic	(	const Chain &	chain,
		int	num_mimic_joints = `0`,
		int	num_redundant_joints = `0`,
		bool	position_ik = `false`,
		double	eps = `0.00001`,
		int	maxiter = `150`
	)		`[explicit]`

Constructor of the solver

Parameters:

chain	the chain to calculate the inverse velocity kinematics for
num_mimic_joints	The number of joints that are setup to follow other joints
num_redundant_joints	The number of redundant dofs
position_ik	false if you want to solve for the full 6 dof end-effector pose, true if you want to solve only for the 3 dof end-effector position.
eps	if a singular value is below this value, its inverse is set to zero, default: 0.00001
maxiter	maximum iterations for the svd calculation, default: 150

Definition at line 31 of file chainiksolver_vel_pinv_mimic.cpp.

KDL::ChainIkSolverVel_pinv_mimic::~ChainIkSolverVel_pinv_mimic ( )

Definition at line 71 of file chainiksolver_vel_pinv_mimic.cpp.

Member Function Documentation

int KDL::ChainIkSolverVel_pinv_mimic::CartToJnt	(	const JntArray &	q_in,
		const Twist &	v_in,
		JntArray &	qdot_out
	)		`[virtual]`

Implements KDL::ChainIkSolverVel.

Definition at line 224 of file chainiksolver_vel_pinv_mimic.cpp.

virtual int KDL::ChainIkSolverVel_pinv_mimic::CartToJnt	(	const JntArray &	q_init,
		const FrameVel &	v_in,
		JntArrayVel &	q_out
	)		`[inline, virtual]`

not (yet) implemented.

Implements KDL::ChainIkSolverVel.

Definition at line 78 of file chainiksolver_vel_pinv_mimic.hpp.

int KDL::ChainIkSolverVel_pinv_mimic::CartToJntRedundant	(	const JntArray &	q_in,
		const Twist &	v_in,
		JntArray &	qdot_out
	)		`[virtual]`

Definition at line 126 of file chainiksolver_vel_pinv_mimic.cpp.

bool KDL::ChainIkSolverVel_pinv_mimic::jacToJacLocked	(	const Jacobian &	jac,
		Jacobian &	jac_locked
	)		`[private]`

Definition at line 116 of file chainiksolver_vel_pinv_mimic.cpp.

bool KDL::ChainIkSolverVel_pinv_mimic::jacToJacReduced	(	const Jacobian &	jac,
		Jacobian &	jac_mimic
	)		`[private]`

Definition at line 103 of file chainiksolver_vel_pinv_mimic.cpp.

void KDL::ChainIkSolverVel_pinv_mimic::lockRedundantJoints ( ) [inline]

Definition at line 99 of file chainiksolver_vel_pinv_mimic.hpp.

bool KDL::ChainIkSolverVel_pinv_mimic::setMimicJoints ( const std::vector< kdl_kinematics_plugin::JointMimic > & _mimic_joints )

Set a vector of indices that map each (and every) joint in the chain onto the corresponding joint in a reduced set of joints that do not include the mimic joints. This vector must be of size chain.getNrOfJoints(). E.g. if an arm has 7 joints: j0 to j6. Say j2 mimics (follows) j0. Then, mimic_joints should be: [0 1 0 3 4 5 6].

Parameters:

mimic_joints Vector of size chain.getNrOfJoints() that maps every joint in the chain onto (a) itself if its not a mimic joint or (b) onto the active dof that it is mimicking

Definition at line 75 of file chainiksolver_vel_pinv_mimic.cpp.

bool KDL::ChainIkSolverVel_pinv_mimic::setRedundantJointsMapIndex ( const std::vector< unsigned int > & redundant_joints_map_index )

Set a mapping between a reduced set of joints (numbering either 6 or 3) and the full set of active (i.e excluding the mimic joints) DOFs in the robot. As an example, consider an arm with 7 joints: j0 to j6. If j2 represents the redundancy, then redundant_joints_map_index will be a 6 dimensional vector - [0 1 3 4 5 6], i.e. joint_value_full(redundant_joints_map_index[i]) = joint_value_reduced(i), for i=0,...5.

Definition at line 89 of file chainiksolver_vel_pinv_mimic.cpp.

void KDL::ChainIkSolverVel_pinv_mimic::unlockRedundantJoints ( ) [inline]

Definition at line 104 of file chainiksolver_vel_pinv_mimic.hpp.