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Interpreting Contact Interactions to Overcome Failure in Robot Assembly Tasks

2021-01-07 19:10:16
Peter A. Zachares, Michelle A. Lee, Wenzhao Lian, Jeannette Bohg

Abstract

tract: A key challenge towards the goal of multi-part assembly tasks is finding robust sensorimotor control methods in the presence of uncertainty. In contrast to previous works that rely on a priori knowledge on whether two parts match, we aim to learn this through physical interaction. We propose a hierachical approach that enables a robot to autonomously assemble parts while being uncertain about part types and positions. In particular, our probabilistic approach learns a set of differentiable filters that leverage the tactile sensorimotor trace from failed assembly attempts to update its belief about part position and type. This enables a robot to overcome assembly failure. We demonstrate the effectiveness of our approach on a set of object fitting tasks. The experimental results indicate that our proposed approach achieves higher precision in object position and type estimation, and accomplishes object fitting tasks faster than baselines.

Abstract (translated)

URL

https://arxiv.org/abs/2101.02725

PDF

https://arxiv.org/pdf/2101.02725


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