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A LEAP hand reached 95.2 percent of 4,800 unseen in-hand pose goals, and a safety filter cut its drops 75 percent

AspireAI community · arXiv
Learned multi-finger hand skills have mostly stayed at simple grasps and rotations, often at one wrist orientation, and safety has been an afterthought. This paper trains in-hand object pose reaching for a LEAP hand in simulation with no human data, using generated grasp datasets and an adaptive friction curriculum, then transfers zero-shot to the real hand. Over 13.3 hours of real-robot run time and 4,800 randomly drawn unseen goals across a knife, a wineglass, a lightbulb and a rubber duck at six wrist orientations, the state-based policy hit 95.2 percent of goals within 2 cm and 0.4 rad. Adding a learned residual safety filter with an adjustable conservatism setting cut drops from 16 to 4 while still reaching 91.5 percent of goals. The wrist-camera-only policy reached 72 percent, with the filter nearly halving its drops. The limits are worth stating. The depth policy is far below the state policy, the safety filter trades away goal completion for fewer drops rather than eliminating them, and everything here is four objects on one hand rather than general dexterity. The team also says it will release the code and checkpoints, which is a promise rather than a link you can use today.
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