roboticstoolbox.robot.IK.IKSolver

class roboticstoolbox.robot.IK.IKSolver(name='IK Solver', ilimit=30, slimit=100, tol=1e-06, mask=None, joint_limits=True, seed=None)[source]

An abstract super class for numerical inverse kinematics (IK)

This class provides basic functionality to perform numerical IK. Superclasses can inherit this class and implement the solve method and redefine any other methods necessary.

Parameters:

  • name (str) – The name of the IK algorithm

  • ilimit (int) – How many iterations are allowed within a search before a new search is started

  • slimit (int) – How many searches are allowed before being deemed unsuccessful

  • tol (float) – Maximum allowed residual error E

  • mask (Union[ndarray, List[float], Tuple[float], Set[float], None]) – A 6 vector which assigns weights to Cartesian degrees-of-freedom error priority

  • joint_limits (bool) – Reject solutions with joint limit violations

  • seed (Optional[int]) – A seed for the private RNG used to generate random joint coordinate vectors

See also

IK_NR

Implements this class using the Newton-Raphson method

IK_GN

Implements this class using the Gauss-Newton method

IK_LM

Implements this class using the Levemberg-Marquadt method

IK_QP

Implements this class using a quadratic programming approach

Changed in version 1.0.3: Added the abstract super class IKSolver

__init__(name='IK Solver', ilimit=30, slimit=100, tol=1e-06, mask=None, joint_limits=True, seed=None)[source]

Methods

__init__([name, ilimit, slimit, tol, mask, ...])

error(Te, Tep)

Calculates the error between Te and Tep

solve(ets, Tep[, q0])

Solves the IK problem

step(ets, Tep, q)

Abstract step method