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arXiv 2606.15516cs.RO

传递接触,而不仅仅是运动:跨灵巧手的柔顺抓取

Transferring Contact, Not Just Motion: Compliant Grasping Across Dexterous Hands

University of California San Diego(加州大学圣迭戈分校)

Soofiyan Atar, Yao-Ting Huang, Michael Yip

AI总结:

提出跨本体力-位置接口,通过校准力矩和指尖力实现异构灵巧手间的接触感知抓取,结合流匹配视觉运动策略和混合力位控制器,实现可迁移的柔顺抓取。

摘要:

灵巧抓取依赖于接触调节,而不仅仅是运动。稳定操作要求手指在接触滑动、变形或视觉遮挡时保持适当的物体负载。现有的跨本体灵巧策略通过重定向手部姿态或潜在动作统一运动,但力反馈仍与每只手的感觉和驱动绑定,限制了迁移。本文引入了一种跨本体力-位置接口,用于异构灵巧手之间的接触感知操作。运动意图在共享的手部姿态潜在空间中表示,而每只手的力信号通过系统辨识校准为物理关节扭矩(单位N.m)。这些扭矩被映射为指尖力和紧凑的每指负载描述符,使策略获得关于手部应移动到哪里以及物体如何加载的可比观测。利用该接口,训练了一个流匹配视觉运动策略,输入视觉、本体感觉和校准后的接触,并采用结构化视觉掩码,在抓取相关遮挡下鼓励依赖力。相同的校准信号驱动混合力-位置控制器进行演示采集和执行,保持训练和部署中的力目标一致。在结构不同的手上进行的实验表明,校准的接触反馈实现了可迁移的柔顺抓取,学习到的基元可在长时程操作流程中重复使用。

英文摘要:

Dexterous grasping depends on contact regulation, not motion alone. Stable manipulation requires fingers to maintain appropriate object loading as contacts slip, deform, or become visually occluded. Existing cross-embodiment dexterous policies unify motion through retargeted hand poses or latent actions, but force feedback remains tied to each hand's sensing and actuation, limiting transfer. This work introduces a cross-embodiment force-position interface for contact-aware manipulation across heterogeneous dexterous hands. Motion intent is represented in a shared hand-pose latent, while each hand's effort signal is calibrated through system identification into physical joint torque in N.m. These torques are mapped to fingertip forces and compact per-finger load descriptors, giving the policy comparable observations of where the hand should move and how the object is loaded. Using this interface, a flow-matching visuomotor policy is trained on vision, proprioception, and calibrated contact, with structured visual masking that encourages reliance on force under grasp-relevant occlusion. The same calibrated signal drives a hybrid force-position controller for demonstration collection and execution, keeping force targets consistent across training and deployment. Experiments across structurally different hands show that calibrated contact feedback enables transferable compliant grasping, with learned primitives reusable in long-horizon manipulation pipelines.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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