arXiv Machine Learning By Lizhi Yang, Yiling Hou, Yao Tang, Junheng Li, Daniel Weng, Blake Werner, Aaron D. Ames

CSF: Contextual Safety Filtering for Motion Generators

Read the original on arXiv Machine Learning →

The paper introduces Contextual Safety Filtering (CSF), a training‑free method that enforces natural‑language safety rules on text‑conditioned motion generators by comparing generated trajectories to safe and unsafe reference paths. CSF uses an affine safety value derived from these references and a safe reference tracking CBF‑QP to activate rules in both explicit and scene‑triggered unsafe scenarios. Experiments on four pretrained generators show CSF reduces danger‑event rates by up to 90% while preserving 88‑100% of benign motions, and a real‑world Unitree G1 robot demonstrates successful prevention of unsafe motions in diverse human and object interaction settings.

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