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cs.RO

How to control robots safely when they touch things

Haegu Lee, Yitaek Kim, Christoffer Sloth

May 20, 2026

Robots doing contact-rich tasks like pushing or grasping need smooth dynamics models for gradient-based control, but smoothing parameters hide the true contact forces—making safety filters unreliable. This work provides a way to bound actual contact forces despite smoothing, then builds a safety framework that automatically tunes the smoothing level and adds adaptive margins to handle force prediction errors. Simulations show it eliminates violations that standard safety methods miss.
Published as Safety-Critical Control for Smoothed Implicit Contact Dynamics arXiv:2605.21138
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