変形物体操作のための地平線非依存ニューラルオペレータを用いたオンライン安全フィルタ
Online Safety Filter for Deformable Object Manipulation with Horizon Agnostic Neural Operators
変形物体操作において、報酬設計ではなく明示的なタスクレベルの安全制約をリアルタイムで強制するオンライン安全フィルタを提案。流体操作タスクで安全性と効率性を向上させた。
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著者: Jiaxing Li, Hanjiang Hu, Zhuoyuan Wang, Yorie Nakahira, Changliu Liu
分類: cs.RO
原文アブストラクト
Safety critical control of robotic manipulation tasks involving deformable media such as fluids, cloth, and soft objects remains challenging because existing learning based approaches encode safety indirectly through reward shaping, which provides no guarantee of constraint satisfaction at deployment. We present a constraint driven online safety filter for deformable object manipulation that enforces explicit task level safety constraints in real time by minimally modifying any nominal control policy. Our approach combines two key components: a horizon agnostic neural operator that learns the boundary input output mapping of the underlying PDE dynamics and generalizes across variable rollout lengths without retraining, and a boundary control barrier function that certifies safety at the task relevant output level via a lightweight quadratic program. The resulting safety constraint is affine in the boundary input rate, enabling real time online filtering. We evaluate the proposed method on fluid manipulation tasks in FluidLab, where the filter improves safe trajectory rates by up to 22% over unfiltered base policies while also reducing the number of steps required to reach the safe set, demonstrating that constraint driven safety enforcement is both more reliable and more efficient than reward shaping approaches.
