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About

Hidekazu Kajiwara is a pioneering researcher in the field of advanced robotics and actuator systems, with a particular focus on ultrasonic motors and bio-inspired robotic locomotion. His most significant contributions lie in the development of multi-degree-of-freedom spherical ultrasonic motors (MDOF-SUSMs), which offer high torque at low speeds and self-holding force without the need for reduction gearing—a breakthrough for compact actuators in robot joints and space applications. His 2018 paper on a high-torque sandwich-type spherical ultrasonic motor has garnered 24 citations, underscoring its impact. Kajiwara has also made notable strides in infrastructure robotics, designing a hanger-rope inspection robot for suspension bridges (2019, 9 citations) and a lifting system for high-elevation inspections (2019, 4 citations), addressing critical needs in infrastructure maintenance. In educational robotics, he developed a programming teaching-aid robot using a compact disc and microcomputer (2017, 8 citations), making robotics accessible to young students. His work on motion control for a horizontal bar gymnastic robot (2000, 8 citations) and quasi-passive walking robots (2006, 6 citations) demonstrates his versatility in dynamic systems and periodic input control. Kajiwara’s research spans from fundamental actuator design to practical inspection robots and educational tools, reflecting a career dedicated to advancing both theoretical understanding and real-world applications.