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Series Elastic Actuators (SEA)

Actuators with a physical spring element between motor and output. Torque sensing via spring deflection.

CategoryActuators
Market classPrototype
Introduction date20 March 2023
1 component
Deployed
Actuators·Agility Robotics

Agility Digit v4 SEA

Series Elastic Actuator powering the 16 joints of the Digit v4 humanoid — mechanical passive compliance inherited from ATRIAS and Cassie, central to Agility’s dynamic bipedal gait.