障害物環境における捕捉可能性を考慮した足配置計画:軸平行安全回廊上の再帰的実行可能逐次MPC
Capturability-Aware Footstep Planning in Cluttered Environments: A Recursively Feasible Sequential MPC on Axis-Aligned Safe Corridors
LIPモデルのヒューマノイド足配置計画において、交差矩形列からなる安全回廊で障害物回避と捕捉可能性制約を統合し、再帰的実行可能性を保証する逐次MPCを提案。予期せぬ閉扉時にはその場歩行に切替え、Digitの高忠実度シミュレーションで有効性を示した。
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著者: Athanasios Kyriakopoulos, Shubham S. Kumbhar, Kunal S. Narkhede, Abhijeet M. Kulkarni, Ioannis Poulakakis
分類: cs.RO
原文アブストラクト
A fundamental aspect of humanoid footstep planning is to jointly guarantee obstacle avoidance and locomotion stability. This paper presents a capturability-aware sequential Model Predictive Control (MPC) framework for Linear Inverted Pendulum (LIP)-based humanoid footstep planning in the presence of obstacles. The proposed method combines obstacle avoidance with capturability constraints through safe corridors constructed as sequences of intersecting rectangles, yielding a sequential MPC framework with recursive feasibility guarantees for the LIP-based planning layer. The planner autonomously adapts to constrained scenarios, switching to in-place walking when obstructions---such as doors assumed to be open during planning but unexpectedly found to be closed during execution---block forward motion. Performance is largely independent of the prediction horizon, allowing high success rates while keeping the computational cost low. The approach is validated in high-fidelity simulations with the humanoid robot Digit, demonstrating a practical solution for capturable humanoid footstep planning in cluttered environments.