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Low-cost teleop systems have democratized robot data collection, but they lack any force feedback, making it challenging to teleoperate contact-rich tasks. Many robot arms provide force information — a critical yet underutilized modality in robot learning. We introduce: 1. 🦾A low-cost, force-feedback-enabled teleop system. 2. 🥊Force-Attending Curriculum Training (FACTR)... show more
11 条评论

🦾Our teleop system (~$1K per leader arm) lets users intuitively feel forces experienced by robots, without additional sensor hardware. This can be done for many arms. We also integrate gravity comp, redundancy resolution, etc. in the teleop leader arm, augmenting the teleop experience. (2/N)

🥊 Naively adding force to policy learning does not guarantee performance improvement. BC policies often overfit to vision input and ignore force when added naively, limiting performance in contact-rich tasks. (3/N)

🥊 We propose FACTR, a curriculum that corrupts vision with decreasing intensity during training. This prevents overfitting to vision and guides the policy to properly attend to force. (4/N)

🥊 FACTR policies generalize to unseen objects significantly better than baseline policies (vision+force without FACTR). (5/N)

🥊 We visualize cross attention of action tokens to force (blue) and vision (orange) tokens. [Left] Without FACTR, policy does not pay much attention to force. [Right] FACTR policies properly attend to force, even learning mode-switches, indicated by force attention outweighing vision. (6/N)

🥊 By attending to force, FACTR policies also exhibit emergent recovery behavior (not in training data), even for unseen objects. We do not observe this in baseline policies. (7/N)

Both our teleop system and autonomous policies significantly outperform baselines. FACTR is easy to set up on existing systems. All components will be open-sourced soon! w/ @yulongli42 @kenny__shaw @_tonytao_ @rsalakhu @pathak2206 (8/N)

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Excellent work🎉! I believe that force information/control is crucial for robot manipulation. If you are interested in my research, please feel free to visit my post and paper, highlighting the importance of position and force information and control !

Did you use the internal force estimates from Franka? You can check also our force sensing platform that converts any robot to a multi axis force sensor. We are also working in something. Let’s keep in touch

We used the built-in external force estimates from Franka. What you have here is super cool! Let’s keep in touch
