Max Robotics — Global Service Robot Directory + US Certification

About

Terumasa Narukawa is a leading researcher in the field of bipedal robotics, with a core focus on passive dynamic walking and energy-efficient locomotion. His major contributions center on bridging the gap between purely passive walkers—which rely on gravity to descend slopes—and active robots capable of stable, level-ground walking. Narukawa pioneered the design of a simple 3D straight-legged passive walker with flat feet and ankle springs, a novel configuration that solved the yaw instability common in traditional arc-foot designs. This work, his most cited with 21 citations, demonstrated that passive dynamics could be harnessed with more human-like foot geometry. He further advanced the field by introducing a torso to replace gravity as the primary power source, enabling active bipeds to walk on level ground with remarkable efficiency. Through numerical simulations and stability analyses, he showed that minimal hip actuation and simple swing-leg control could produce steady, natural gaits. Narukawa’s research has been instrumental in proving that highly efficient, low-control bipedal walking is achievable, directly influencing the design of energy-saving prosthetics and humanoid robots.