腱駆動連続体ロボットのための学習ベース動力学モデリングとロバスト制御
Learning-Based Dynamics Modeling and Robust Control for Tendon-Driven Continuum Robots
腱駆動連続体ロボットの複雑な非線形性を捉えるGRUベースの動力学モデルを提案し、これを勾配ブリッジとして用いてエンドツーエンドのニューラル制御ポリシーを最適化する。物理実験で正確な追従と未知負荷に対するロバスト性を実証した。
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著者: Ziqing Zou, Ke Qiu, Fei Wang, Haojian Lu, Rong Xiong, Yue Wang
分類: cs.RO
原文アブストラクト
Tendon-Driven Continuum Robots (TDCRs) pose significant modeling and control challenges due to complex nonlinearities, such as frictional hysteresis and transmission compliance. This paper proposes a differentiable learning framework that integrates high-fidelity dynamics modeling with robust neural control. We develop a GRU-based dynamics model featuring bidirectional multi-channel connectivity and residual prediction to effectively suppress compounding errors during long-horizon auto-regressive prediction. By treating this model as a gradient bridge, an end-to-end neural control policy is optimized through backpropagation, allowing it to implicitly internalize compensation for intricate nonlinearities. Experimental validation on a physical three-section TDCR demonstrates that our framework achieves accurate tracking and superior robustness against unseen payloads, outperforming Jacobian-based methods by eliminating self-excited oscillations. For implementation details and source code, please refer to https://github.com/ZiqingZou/ContinuumControl.
