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Fast Humanoid Robot Collision-Free Footstep Planning Using Swept Volume Approximations

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5 Author(s)
Perrin, N. ; LAAS, Univ. de Toulouse, Toulouse, France ; Stasse, O. ; Baudouin, L. ; Lamiraux, F.
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In this paper, we propose a novel and coherent framework for fast footstep planning for legged robots on a flat ground with 3-D obstacle avoidance. We use swept volume approximations that are computed offline in order to considerably reduce the time spent in collision checking during the online planning phase, in which a rapidly exploring random tree variant is used to find collision-free sequences of half-steps (which are produced by a specific walking pattern generator). Then, an original homotopy is used to smooth the sequences into natural motions, gently avoiding the obstacles. The results are experimentally validated on the robot HRP-2.

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Robotics, IEEE Transactions on  (Volume:28 ,  Issue: 2 )