モジュール型ロボット運動制御における通信:現実的制約下での両側性コントローラ
Communication in modular robotic motor control: Bilateral controllers under realistic constraints
脳の左右半球構造に着想を得た、遅延のある通信チャネルで接続された2つのGRUモジュールからなるリカレントコントローラを提案し、筋骨格シミュレータ上で単一アーキテクチャより高い性能を示した。
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著者: Jingwen Li, Levin Kuhlmann, Jason Friedman, Gideon Kowadlo
分類: cs.RO
原文アブストラクト
Robotic motor control in musculoskeletal systems requires fast, accurate movement and robust postural stabilization under signal-dependent noise (where motor command variance scales with command magnitude) and energetic cost. Modular controllers can distribute these competing demands across interacting submodules, but it remains unclear whether they outperform monolithic architectures under realistic constraints, and how inter-module communication shapes the resulting strategy. Inspired by the bilateral hemispheric organization of the brain, we introduce a recurrent controller of two GRU-based modules connected by a learnable, delayed inter-hemispheric channel, trained end-to-end in a differentiable two-arm musculoskeletal simulator. Across reaching and holding tasks, the modular architecture substantially outperforms a capacity-matched monolithic baseline. Compared to a matched modular controller without communication, learned inter-hemispheric communication reshapes the solution: improved endpoint precision, lower energetic cost in non-zero-delay regimes, and reduced muscle co-contraction. Our findings show that for robotics, biologically inspired modular controllers offer a practical route to robust movement under noise and energetic constraints, with inter-module communication providing a mechanism to tune trade-offs between precision, stability, and actuation cost.