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About

Yasuo Eryu is a pioneering researcher in the field of robotic actuation, with a focused expertise in the application of ultrasonic motors for robot manipulators. His major contributions center on developing precise control methodologies—specifically, the integration of pulse width modulation (PWM) and fuzzy logic controllers to regulate the position and velocity of these unique motors. Eryu’s work addresses a critical challenge: harnessing the high torque, low-speed, and simple structure of traveling wave-type ultrasonic motors for practical robotic arms. His most cited papers, including "Position Control of Robot Manipulators with Ultrasonic Motors using Pulse Width Modulation and Fuzzy Controllers" (1994) and "Velocity Control of Ultrasonic Motors for Robot Arms by Pulse Width Modulation" (1991), each have garnered 10 citations, establishing a foundational impact in this niche area. By demonstrating how to reverse rotor direction and control speed through duty ratio modulation, Eryu has advanced the viability of ultrasonic motors as promising alternatives to traditional electromagnetic actuators, making his research essential reading for students and engineers exploring innovative, high-response robotic systems.