Chi-Keng Tsai

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About

Chi-Keng Tsai is a pioneering figure in the field of robotic locomotion, with a focus on dynamic control and adaptive legged systems. His research centers on the real-time computer control of robot legs, particularly the integration of sensing and actuation to enable stable, terrain-responsive movement. Tsai’s most cited work, “Dynamic Computer Control of a Robot Leg” (1985), introduced a control scheme for a three degree-of-freedom leg interfaced with a PDP-11/70 minicomputer, complemented by CSMP simulations to analyze dynamic behavior off-line. This foundational study, garnering 10 citations, demonstrated how computational control could replicate biological motion in machines. Expanding on this, his 1986 paper “Using proximity sensing in robot leg control” (4 citations) tested dual proximity sensors on a prototype leg for the Adaptive Suspension Vehicle at Ohio State University. This work showed that simple ranging sensors could enable a leg to autonomously step over obstacles, a critical step toward autonomous rough-terrain navigation. Though modest in citation count, Tsai’s contributions were instrumental in the early development of adaptive, sensor-driven walking robots, influencing later advances in legged robotics and dynamic stability.