学習されたラグランジュ潜在ダイナミクスの低次元制御と幾何学的構造
Reduced-order Control and Geometric Structure of Learned Lagrangian Latent Dynamics
高次元ラグランジュ系に対し、構造保存型の低次元潜在ダイナミクスを学習し、その上で追従制御則を導出。安定性・収束性の解釈可能な条件を示し、劣駆動系にも拡張した。
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著者: Katharina Friedl, Noémie Jaquier, Seungyeon Kim, Jens Lundell, Danica Kragic
分類: cs.RO, math.OC
原文アブストラクト
Model-based controllers can offer strong guarantees on stability and convergence by relying on physically accurate dynamic models. However, these are rarely available for high-dimensional mechanical systems such as deformable objects or soft robots. While neural architectures can learn to approximate complex dynamics, they are either limited to low-dimensional systems or provide only limited formal control guarantees due to a lack of embedded physical structure. This paper introduces a latent control framework based on learned structure-preserving reduced-order dynamics for high-dimensional Lagrangian systems. We derive a reduced tracking law for fully actuated systems and adopt a Riemannian perspective on projection-based model-order reduction to study the resulting latent and projected closed-loop dynamics. By quantifying the sources of modeling error, we derive interpretable conditions for stability and convergence. We extend the proposed controller and analysis to underactuated systems by introducing learned actuation patterns. Experimental results on simulated and real-world systems validate our theoretical investigation and the accuracy of our controllers.
