Hostname: page-component-76fb5796d-5g6vh Total loading time: 0 Render date: 2024-04-27T03:27:50.350Z Has data issue: false hasContentIssue false

Stabilized minimum infinity-norm torque solution for redundant manipulators

Published online by Cambridge University Press:  05 April 2001

Ick-Chan Shim
Affiliation:
Department of Mechanical Engineering Korea Advanced Institute of Science and Technology, Yusung-ku, Taejon, 305-701, Korea
Yong-San Yoon
Affiliation:
Department of Mechanical Engineering Korea Advanced Institute of Science and Technology, Yusung-ku, Taejon, 305-701, Korea

Abstract

The minimization of the joint torques based on the ∞-norm is proposed for the dynamic control of a kinematically redundant manipulator. The ∞-norm is preferred to the 2-norm in the minimization of the joint torques since the maximum torques of the actuators are limited. To obtain the minimum ∞-norm torque solution, we devised a new algorithm that uses the acceleration polyhedron representing the end-effector's acceleration capability. Usually the minimization of the joint torques has an instability problem for the long trajectories of the end-effector. To suppress this instability problem, an inequality constraint, named the feasibility constraint, is developed from the geometrical relation between the required end-effector acceleration and the acceleration polyhedron. The minimization of the °-norm of the joint torques subject to the feasibility constraint is shown to improve the performances through the simulations of a 3-link planar redundant manipulator.

Type
Research Article
Copyright
1998 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)