Hostname: page-component-74656f9884-2dmjx Total loading time: 0 Render date: 2026-11-09T13:28:14.873Z Has data issue: false hasContentIssue false

An approach to autonomous robot assembly

Published online by Cambridge University Press:  09 March 2009

Daniel E. Koditschek
Affiliation:
Artificial Intelligence Laboratory, EELS Department, College of Engineering, University of Michigan, Ann Arbor, Michigan 48109(USA)

Summary

Assembly problems require that a robot with fewer actuated degrees of freedom manipulate an environment containing a greater number of unactuated degrees of freedom. From the perspective of control theory, these problems hold considerable interest because they are characterized by the presence of non-holonomic constraints that preclude the possibility of feedback stabilization. In this sense they necessitate the introduction of a hierarchical controller. This paper explores these issues in the simple instance when all of the pieces to be assembled are constrained to lie on a line. A hierarchical controller is devised for this problem and is shown to be correct: the closed loop system achieves any desired final assembly from all initial configurations that lie in its connected component in configuration space; the generated sequence of motions never causes collisions between two pieces. Further examination of this approach interprets the controller's mediation of conflicting subgoals as promoting an M-player game amongst the pieces to be assembled.

Information

Type
Article
Copyright
Copyright © Cambridge University Press 1994

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.)

Article purchase

Temporarily unavailable