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About

Nobuyuki Matsui is a robotics and control systems researcher whose work spans motor control, rehabilitation robotics, and autonomous mobile systems. His most influential contribution lies in the domain of direct drive motor control, where his 1993 paper on torque ripple autocompensation using torque observers garnered 100 citations, establishing foundational techniques for high-precision robot and machine tool applications that eliminate the need for reduction gears. This work addressed the critical challenge of disturbance torque interference that arises in such systems. A significant portion of Matsui's career has been devoted to rehabilitation robotics, where he developed comprehensive support systems for upper limb recovery, including personalized training programs, muscle testing systems, and 3D force display robots. His quantitative approaches to evaluating therapeutic outcomes, particularly in sanding training analysis, helped bridge clinical rehabilitation practice with rigorous engineering methodology. Matsui has also contributed to flexible robot arm control through feedforward vibration suppression strategies and optimal force control during environmental contact motion. His more recent work on hierarchized map-based path planning for autonomous mobile robots reflects his engagement with contemporary logistics automation challenges. Collectively, his research demonstrates a sustained commitment to translating advanced control theory into meaningful real-world robotic applications.