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Walking Hand on Its Fingertips: ETH Zurich’s New Autonomous Robotic Limb
By Drooid · · How we work
A Walking Robotic Hand Takes Its First Steps
Researchers at the Swiss Federal Institute of Technology (ETH Zurich) – specifically the Soft Robotics Lab – have unveiled an anthropomorphic robotic hand that can move independently by walking on its own fingertips. The device, built from an off-the-shelf hand model, carries its own battery, onboard computer and sensor suite, allowing it to balance, locomote and interact with objects without a supporting arm.
How the Hand Was Built and Trained
The team kept the hand’s original finger lengths and internal position controller, opting instead to achieve mobility through software. Using reinforcement-learning simulations, the hand’s control algorithm received rewards for completing tasks while maintaining a natural finger stance. After thousands of simulated attempts, the learned policy transferred to the physical prototype, where the hand successfully navigated a variety of indoor and outdoor surfaces—including tile, grass and stone—by adjusting its gait to differing friction levels.
Demonstrated Capabilities
Beyond basic locomotion, the hand proved capable of fine manipulation. In a highlighted demonstration, the robot was instructed to play the classic puzzle game Sokoban, pressing individual arrow keys while preserving balance throughout the round. The researchers reported that the hand could traverse more than a dozen distinct terrains, consistently accounting for surface-specific friction.
Potential Uses and Future Outlook
The scientists suggest that giving robotic hands independent mobility could expand the versatility of larger humanoid systems, especially in confined workspaces where a full arm cannot reach. For example, a larger robot might place the hand on a support near a narrow opening, allowing the hand to approach a control panel, manipulate a switch, and return for retrieval. While the authors temper expectations about swarms of free-floating limbs, they see the technology as a modular augmentation for future robots designed to operate within human-centric environments.