PccDiffuser: 連続体ロボットのためのマルチソリューション動作計画
PccDiffuser: Multi-solution Motion Planning for Continuum Robots
連続体ロボットの経路計画において、条件付き拡散モデルを用いて複数の候補解を並列生成し、アクチュエータ制約を考慮した軌道に変換する手法を提案。障害物0〜4個の環境で91%の成功率を達成し、従来手法より高成功率かつ高効率であることを示した。
詳しい要約
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著者: Ke Qiu, Sifan Chen, Si Wang, Rong Xiong, Yue Wang, Haojian Lu
分類: cs.RO
原文アブストラクト
We present the PccDiffuser, a conditional diffusion framework for continuum robots that learns a multimodal distribution over complete configuration-space paths and samples multiple candidate solutions in parallel, which are subsequently converted into an executable trajectory by time allocation considering actuator constraints. Under the piecewise constant-curvature model, we use exponential co-ordinates to describe the robot kinematics, and use graph neural network to encode a variable number of environment obstacles. Analytical differential kinematics is incorporated in the denoising process to improve terminal accuracy and whole-body clearance. On a mixed test set comprising workspace with zero to four obstacles, PccDiffuser achieved a success rate of 91\%. Compared with existing sampling- and optimisation-based benchmarks, it delivered both a higher success rate and greater computational efficiency, with the latter advantage becoming more substantial when sampling more candidate solutions. Experiments on a three-section tendon-driven continuum robot further demonstrate consecutive planning, multi-solution planning, and whole-body obstacle avoidance.