動吸振器を用いた振戦の抑制に関する研究(機械力学,計測,自動制御)  [in Japanese] A Study on Vibration Control of Physiological Tremor Using Dynamic Absorber(Mechanical Systems)  [in Japanese]

In the present study, mitigation of an intrinsic vibration in human limb called physiological tremor is investigated. The tremor is observed in most human arms even at physically well condition that is derived from excessive stress or chills, therefore, it may cause anyone bad effect on precise operation such as welding and surgery. In this study experiments are performed where the transcription task is imposed on subjects whose wrists are equipped with the dynamic absorber attenuating the tremor in their hands. Good results are obtained where the tremor is reduced to approximately tenth compared with the case without damper. Furthermore, the numerical model of human limbs is introduced, where the tremor is induced by van der Pol type self-excited vibration mechanism. It is also shown that the dynamic absorber can attenuate vibration in human arm despite the intrinsic nonlinearity.

In the present study, mitigation of an intrinsic vibration in human limb called physiological tremor is investigated. The tremor is observed in most human arms even at physically well condition that is derived from excessive stress or chills, therefore, it may cause anyone bad effect on precise operation such as welding and surgery. In this study experiments are performed where the transcription task is imposed on subjects whose wrists are equipped with the dynamic absorber attenuating the tremor in their hands. Good results are obtained where the tremor is reduced to approximately tenth compared with the case without damper. Furthermore, the numerical model of human limbs is introduced, where the tremor is induced by van der Pol type self-excited vibration mechanism. It is also shown that the dynamic absorber can attenuate vibration in human arm despite the intrinsic nonlinearity.