MIRROR: 並列微分逆運動学によるリアルタイムリターゲティングと遠隔操作を用いた視覚的動作模倣
MIRROR: Visual Motion Imitation via Real-time Retargeting and Teleoperation with Parallel Differential Inverse Kinematics
GPU並列化と継続法を用いた微分逆運動学ソルバを提案し、拘束による局所最小値からの脱出を改善しつつ、自己衝突回避制御障壁関数とLyapunov基準で安全性を確保。視覚骨格推定と組み合わせ、THEMISヒューマノイドでのリアルタイム上半身遠隔操作を実現した。
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著者: Junheng Li, Lizhi Yang, Aaron D. Ames
分類: cs.RO
原文アブストラクト
Real-time humanoid teleoperation requires inverse kinematics (IK) solvers that are both responsive and constraint-safe under kinematic redundancy and self-collision constraints. While differential IK enables efficient online retargeting, its locally linearized updates are inherently basin-dependent and often become trapped near joint limits, singularities, or active collision boundaries, leading to unsafe or stagnant behavior. We propose a GPU-parallelized, continuation-based differential IK that improves escape from such constraint-induced local minima while preserving real-time performance, promoting safety and stability. Multiple constrained IK quadratic programs are evaluated in parallel, together with a self-collision avoidance control barrier function (CBF), and a Lyapunov-based progression criterion selects updates that reduce the final global task-space error. The method is paired with a visual skeletal pose estimation pipeline that enables robust, real-time upper-body teleoperation on the THEMIS humanoid robot hardware in real-world tasks.
