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Fault tolerant motion planning of robotic manipulators based on a nested RRT algorithm

Biyun Xie (College of Mechanical Engineering & Applied Electronics Technology, Beijing University of Technology, Beijing, China)
Jing Zhao (College of Mechanical Engineering & Applied Electronics Technology, Beijing University of Technology, Beijing, China)
Yu Liu (College of Mechanical Engineering & Applied Electronics Technology, Beijing University of Technology, Beijing, China)

Industrial Robot

ISSN: 0143-991X

Article publication date: 6 January 2012

404

Abstract

Purpose

The purpose of this paper is to present a new nested rapidly‐exploring random tree (RRT) algorithm for fault tolerant motion planning of robotic manipulators.

Design/methodology/approach

Another RRT algorithm is nested within the general RRT algorithm. This second nested level is used to check whether the new sampled node in the first nested level is fault tolerant. If a solution can be found in the second nested RRT, the reduced manipulator after failures at the new sampled node can still fulfill the remaining task and this new sampled node is added into the nodes of RRT in the first level. Thus, the nodes in the first level RRT algorithm are all fault tolerant postures. The final trajectory joined by these nodes is also obviously fault tolerant. Besides fault tolerance, this new nested RRT algorithm also can fulfill some secondary tasks such as improvement of dexterity and obstacle avoidance. Sufficient simulations and experiments of this new algorithm on fault tolerant motion planning of robotic manipulators are implemented.

Findings

It is found that the new nested RRT algorithm can fulfill fault tolerance and some other secondary tasks at the same time. Compared to other existing fault tolerant algorithms, this new algorithm is more efficient.

Originality/value

The paper presents a new nested RRT algorithm for fault tolerant motion planning.

Keywords

Citation

Xie, B., Zhao, J. and Liu, Y. (2012), "Fault tolerant motion planning of robotic manipulators based on a nested RRT algorithm", Industrial Robot, Vol. 39 No. 1, pp. 40-46. https://doi.org/10.1108/01439911211192484

Publisher

:

Emerald Group Publishing Limited

Copyright © 2012, Emerald Group Publishing Limited

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