Gen YAMADA

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About

Gen Yamada’s research career is defined by a deep engagement with the dynamics and control of flexible robotic systems—machines that must move with speed and precision despite having inherently elastic, low-rigidity structures. His most recognized contribution is the development of a state observer for vibration control, applied to a golf swing robot used for evaluating club performance. In this 2005 work, which has garnered 16 citations, Yamada modeled the golf club as a flexible beam using Hamilton’s principle and designed an optimal controller that actively suppresses bending vibrations during the swing. This work directly addresses the challenge of maintaining accuracy in high-speed, flexible manipulators. Earlier, in 1995, he laid foundational groundwork by analyzing a horizontal robot arm composed of both high- and low-rigidity links connected by a passive joint with a brake system. His studies demonstrated how to harness elastic deformation for high-speed, low-power operation. Though his citation counts are modest, Yamada’s focused contributions to vibration suppression and elastic-link dynamics offer practical insights for engineers designing lightweight, high-performance robotic arms.