An extension to operational space for kinematically redundant manipulators: Kinematics and dynamics

Abstract

An extension to operational space (EXOS) is presented for the explicit representation of the null-space (NS) dynamics and its interaction with the operational-space dynamics. First, the EXOS Jacobian is formed by augmenting the Jacobian matrix with a minimum number of its NS vectors. Based on the EXOS Jacobian, free of algorithmic singularity, the kinematics, statics, and dynamics of a redundant manipulator are derived in a compact form. In particular, the resulting EXOS dynamics is able to identify the inner dynamic structure. Its efficacy and efficiency have been demonstrated through comparative analysis and simulation.