Design of an Affordable, Fully-Actuated Biomimetic Hand for Dexterous Teleoperation Systems

2025-10-19

AI Summary

In the “learning from demonstration” paradigm, the scarcity of low-cost, fully actuated five-finger dexterous hands hinders large-scale real-robot data collection. To address this bottleneck, we propose RAPID Hand—a 20-degree-of-freedom, fully actuated, low-cost biomimetic dexterous hand prototype. Our method introduces a novel universal interphalangeal gear transmission architecture and an omnidirectional thumb actuation mechanism, synergistically integrated with optimized motor placement and high-strength 3D-printed structural design. This achieves high dexterous manipulability while significantly improving maintainability and reproducibility. Integrated into a teleoperation platform, RAPID Hand demonstrates robust performance across complex multi-finger tasks—including precision grasping, spoon manipulation, and human-like piano playing—validating its practical utility for real-world robotic data acquisition and embodied intelligence research. Its cost-effectiveness, scalability, and open-design principles further underscore its broad applicability and deployment potential.

Technology Category

• Intelligent Robots: Manipulation
• Humans and AI: Interaction Techniques and Devices
• Planning, Routing, and Scheduling: Replanning and Plan Repair

Application Category

• Economics, Online Markets and Human Computation: Trust and reliance of crowd workers and data experts on GenAI
• Responsible Web: Machine-in-the-loop, human agency and autonomy
• Graph Algorithms and Modeling for the Web: Efficient manipulation of static and dynamic Web-related graphs

Abstract

This paper addresses the scarcity of affordable, fully-actuated five-fingered hands for dexterous teleoperation, which is crucial for collecting large-scale real-robot data within the "Learning from Demonstrations" paradigm. We introduce the prototype version of the RAPID Hand, the first low-cost, 20-degree-of-actuation (DoA) dexterous hand that integrates a novel anthropomorphic actuation and transmission scheme with an optimized motor layout and structural design to enhance dexterity. Specifically, the RAPID Hand features a universal phalangeal transmission scheme for the non-thumb fingers and an omnidirectional thumb actuation mechanism. Prioritizing affordability, the hand employs 3D-printed parts combined with custom gears for easier replacement and repair. We assess the RAPID Hand's performance through quantitative metrics and qualitative testing in a dexterous teleoperation system, which is evaluated on three challenging tasks: multi-finger retrieval, ladle handling, and human-like piano playing. The results indicate that the RAPID Hand's fully actuated 20-DoF design holds significant promise for dexterous teleoperation.

Problem

• Developing affordable fully-actuated robotic hands for teleoperation systems
• Creating low-cost 20-DoA dexterous hands for real-robot data collection
• Designing anthropomorphic hands with novel transmission schemes for enhanced dexterity

Innovation

• Low-cost 20-DoA hand with anthropomorphic actuation
• Universal phalangeal transmission for non-thumb fingers
• 3D-printed parts with custom gears for affordability