Wuji Hand: What’s Different in Its Design? With Scott Walter and Marwa ElDiwiny

The Wuji Hand represents a significant shift in robotic dexterity by utilizing 20 individual rotary actuators rather than traditional tendon-based systems. This architecture allows for independent control of each finger joint, significantly reducing the "sim-to-real" gap for complex manipulation tasks. By integrating motors directly into the phalanges and employing four-bar linkage mechanisms for flexion, the design achieves a robust, human-like grip capable of lifting 20 kilograms. While the hand demonstrates superior precision and repeatability compared to tendon-driven counterparts, current teleoperation interfaces often limit its full potential, as data gloves struggle to capture the nuances of human grasping. Future advancements in actuator torque density and standardized mechanical interfaces will likely determine the viability of such highly articulated hands in broader humanoid robotics applications, moving beyond current limitations in grip stability and finger-tip control.