开源可定制机器人手设计,支持多种形态,实现灵活操作。
Embodied Manipulation with Past and Future Morphologies through an Open Parametric Hand Design
- 基于参数化设计,3D打印单件成型,支持快速定制与制造。
- 实现刚度变化达两个数量级,支持多样操作行为。
- 适合研究人形之外的新手型设计,推动机器人灵巧操作发展。
人形机器人手具备无与伦比的灵活性和精细操作能力,能完成广泛任务。从古生物学记录和动物界可见多种手部与驱动设计。理解形态设计空间及其衍生行为,不仅有助于揭示灵巧操作及其演化机制,还可辅助优化设计,最终超越人类能力。当前手部实体探索受限于真实世界中可定制手的不可及性,以及复杂交互模拟中的现实差距。本文提出一种开放参数化设计,融合简化定制、制造与控制技术,通过非线性滚动关节、解剖学腱路布局及低自由度调制驱动系统,实现无需牺牲灵巧性的单件3D打印手快速生产。我们评估了该设计在低层行为范围与稳定性上的表现,显示刚度变化跨越两个数量级。此外,制作了三种手型:人类手、双拇指镜像手、狐猴手。操控测试验证了各手型对多样化物体的操作能力差异,并展示了每种设计独有的涌现行为。整体上,本文揭示了新型机器人手设计可能性,提供可比较不同手部形态与结构的设计空间,并公开一个实用且开源的设计,用于探索具身操作。
原文摘要 · Abstract (English)
A human-shaped robotic hand offers unparalleled versatility and fine motor skills, enabling it to perform a broad spectrum of tasks with precision, power and robustness. Across the paleontological record and animal kingdom we see a wide range of alternative hand and actuation designs. Understanding the morphological design space and the resulting emergent behaviors can not only aid our understanding of dexterous manipulation and its evolution, but also assist design optimization, achieving, and eventually surpassing human capabilities. Exploration of hand embodiment has to date been limited by inaccessibility of customizable hands in the real-world, and by the reality gap in simulation of complex interactions. We introduce an open parametric design which integrates techniques for simplified customization, fabrication, and control with design features to maximize behavioral diversity. Non-linear rolling joints, anatomical tendon routing, and a low degree-of-freedom, modulating, actuation system, enable rapid production of single-piece 3D printable hands without compromising dexterous behaviors. To demonstrate this, we evaluated the design's low-level behavior range and stability, showing variable stiffness over two orders of magnitude. Additionally, we fabricated three hand designs: human, mirrored human with two thumbs, and aye-aye hands. Manipulation tests evaluate the variation in each hand's proficiency at handling diverse objects, and demonstrate emergent behaviors unique to each design. Overall, we shed light on new possible designs for robotic hands, provide a design space to compare and contrast different hand morphologies and structures, and share a practical and open-source design for exploring embodied manipulation.
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