RESEARCH PAPERS: Design Automation

A Fast Algorithm for Planning Collision-Free Paths With Rotations

[+] Author and Article Information
S.-F. Chen

Department of Mechanical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong

J. H. Oliver

Iowa Center for Emerging Manufacturing Technology, Department of Mechanical Engineering, Iowa State University, Ames, Iowa

D. Fernandez-Baca

Department of Computer Science, Iowa State University, Ames, Iowa

J. Mech. Des 120(1), 52-57 (Mar 01, 1998) (6 pages) doi:10.1115/1.2826676 History: Received October 01, 1997; Online December 11, 2007


Motion planning is a major problem in robotics. The objective is to plan a collision-free path for a robot moving through a workspace populated with obstacles. In this paper, we present a fast and practical algorithm for moving a convex polygonal robot among a set of polygonal obstacles with translations and rotations. The running time is O(c((n + k)N + n log n)), where c is a parameter controlling the precision of the results, n is the total number of obstacle vertices, k is the number of intersections of configuration space obstacles, and N is the number of obstacles, decomposed into convex objects. This work builds upon the slabbing method proposed by Ahrikencheikh et al. [2], which finds an optimal motion for a point among a set of nonoverlapping obstacles. Here, we extend the slabbing method to the motion planning of a convex polygonal robot with translations and rotations, which also allows overlapping configuration space obstacles. This algorithm has been fully implemented and the experimental results show that it is more robust and faster than other approaches.

Copyright © 1998 by The American Society of Mechanical Engineers
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