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- W2022854905 abstract "The efficiency of probabilistic roadmap (PRM) planners drops dramatically in spaces with narrow passages. This paper presents a new method - small-step retraction - that helps PRM planners find paths through such passages. The method consists of slightly fattening the robot's free space, constructing a roadmap in the fattened free space, and repairing colliding portions of this roadmap by retracting them out of collision. The fattened free space is not explicitly computed. Instead, the robot links and/or obstacles are thinned around their medial axis. A robot configuration lies in fattened free space if the thinned objects do not collide at this configuration. Two repair strategies are used. The optimist strategy waits until a complete path has been found in fattened free space before repairing it. The pessimist strategy repairs the roadmap as it is being built. The former is faster, but the latter is more reliable. A simple combination yields an integrated planner that is both fast and reliable." @default.
- W2022854905 created "2016-06-24" @default.
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- W2022854905 date "2005-01-01" @default.
- W2022854905 modified "2023-10-06" @default.
- W2022854905 title "Finding narrow passages with probabilistic roadmaps: the small step retraction method" @default.
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- W2022854905 doi "https://doi.org/10.1109/iros.2005.1545606" @default.
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