ARCADE: 変化点を考慮したオンライン・ベイズ動力学学習による適応ロボット制御
ARCADE: Adaptive Robot Control with Online Changepoint-Aware Bayesian Dynamics Learning
ロボットの動力学をオンラインでベイズ更新し、変化点検出で急な変化にも迅速に適応する枠組みを提案。カルトポールとドローン実験で予測精度と追従性能の向上を示した。
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著者: Rishabh Dev Yadav, Avirup Das, Hongyu Song, Samuel Kaski, Wei Pan
分類: cs.RO
原文アブストラクト
Real-world robots must operate under evolving dynamics caused by changing operating conditions, external disturbances, and unmodeled effects. These may appear as gradual drifts, transient fluctuations, or abrupt shifts, demanding real-time adaptation that is robust to short-term variation yet responsive to lasting change. We propose a framework for modeling the nonlinear dynamics of robotic systems that can be updated in real time from streaming data. The method decouples representation learning from online adaptation, using latent representations learned offline to support online closed-form Bayesian updates. To handle evolving conditions, we introduce a changepoint-aware mechanism with a latent variable inferred from data likelihoods that indicates continuity or shift. When continuity is likely, evidence accumulates to refine predictions; when a shift is detected, past information is tempered to enable rapid re-learning. This maintains calibrated uncertainty and supports probabilistic reasoning about transient, gradual, or structural change. We prove that the adaptive regret of the framework grows only logarithmically in time and linearly with the number of shifts, competitive with an oracle that knows timings of shift. We validate on cartpole simulations and real quadrotor flights with swinging payloads and mid-flight drops, showing improved predictive accuracy, faster recovery, and more accurate closed-loop tracking than relevant baselines.
