Kenji NISHIHORI

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About

Kenji Nishihori is a pioneering figure in the field of robotics and precision motion control, with a particular focus on the application of ultrasonic motors for robotic systems. His foundational work, "Velocity Control of Ultrasonic Motors for Robot Arms by Pulse Width Modulation" (1991), introduced a novel method for precisely regulating the speed and direction of traveling wave-type ultrasonic motors—devices prized for their simple construction, high response, and large low-speed torque. By leveraging pulse width modulation, Nishihori enabled seamless directional reversal of the rotor, a critical capability for dexterous robot arm manipulation. This contribution laid the groundwork for compact, high-torque actuation in robotics, influencing subsequent designs in automation and assistive devices. With over 10 citations, his research remains a touchstone for engineers exploring alternative motor technologies. Nishihori’s work exemplifies how fundamental control strategies can unlock the potential of emerging hardware, bridging the gap between theoretical mechanics and practical robotic applications. His insights continue to inspire innovations in precision positioning and lightweight robotic systems.