T. Zhang and D.J. Braun, Human Driven Compliant Transmission Mechanism, IEEE International Conference on Robotics and Automation, pp. 7094-7099, 2021.

This paper presents a compliant transmission mechanism designed for energetically-passive exoskeletons. The mechanism allows humans to supply energy when the leg is in the air, store it, and then release it when the leg is on the ground to amplify force and power. This prototype represents a key step toward artificial limbs that enhance mobility without requiring external energy.

Why it matters: Just as bicycle gears enable efficient transfer of human energy, compliant transmissions could allow exoskeletons to boost strength and speed while remaining energetically passive. This work lays the foundation for wearable systems that extend human mobility in an energy-efficient way.