無関節トルクセンサヒューマノイドのための物理情報ニューラルネットワークとアンセンテッドカルマンフィルタによるトルク推定
Physics-Informed Neural Networks with Unscented Kalman Filter for Sensorless Joint Torque Estimation in Humanoid Robots
関節トルクセンサを持たないヒューマノイドロボットにおいて、物理情報ニューラルネットワークで摩擦をモデル化し、アンセンテッドカルマンフィルタで関節トルクを推定する全身トルク制御フレームワークを提案し、ergoCubでの実験で有効性を示した。
詳しい要約
1. どんなもの?
2. 先行研究と比べてどこがすごい?
3. 技術・手法の肝は?
4. どうやって有効だと検証した?
5. 議論はある?
6. 次に読むべき論文は?
※ AIが要旨から生成した要約です。正確性は原文をご確認ください。
著者: Ines Sorrentino, Giulio Romualdi, Lorenzo Moretti, Silvio Traversaro, Daniele Pucci
分類: cs.RO
原文アブストラクト
This paper presents a novel framework for whole-body torque control of humanoid robots without joint torque sensors, designed for systems with electric motors and high-ratio harmonic drives. The approach integrates Physics-Informed Neural Networks (PINNs) for friction modeling and Unscented Kalman Filtering (UKF) for joint torque estimation, within a real-time torque control architecture. PINNs estimate nonlinear static and dynamic friction from joint and motor velocity readings, capturing effects like motor actuation without joint movement. The UKF utilizes PINN-based friction estimates as direct measurement inputs, improving torque estimation robustness. Experimental validation on the ergoCub humanoid robot demonstrates improved torque tracking accuracy, enhanced energy efficiency, and superior disturbance rejection compared to the state-of-the-art Recursive Newton-Euler Algorithm (RNEA), using a dynamic balancing experiment. The framework's scalability is shown by consistent performance across robots with similar hardware but different friction characteristics, without re-identification. Furthermore, a comparative analysis with position control highlights the advantages of the proposed torque control approach. The results establish the method as a scalable and practical solution for sensorless torque control in humanoid robots, ensuring torque tracking, adaptability, and stability in dynamic environments.
関連論文
- 直接トルク制御のための超高速周波数補間トルク制御
- SEAトルク制御器を統一枠組みで評価・比較トルク制御
