107 ダッフィング型非線形ばね特性を利用した車椅子用磁石ばね式受動制振装置に関する実験的研究

概要

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In recent years, the welfare vehicles that can carry a wheelchair are increasing and they will increase further. A passive vibration control device for wheelchair using a magnet-spring with Duffing's equation type is proposed. A composite spring that consists of nonlinear magnet-spring and linear metal spring is made. Using the composite spring, the passive vibration control device, which reduces the vibration of near resonance frequency of internal organs, is made. In this study the new passive vibration control device for wheelchair using magnet-spring is compared with the state that locked device. The vibration is measured by acceleration pick-up and the internal condition of a person on the wheelchair is analyzed, based on chaos theory, from fluctuations of a fingertip capillary pulse. The internal condition of the person is newly judged from constants of power and Lyapunov number that are calculated from capillary pulse change. The new passive vibration control device using magnet-spring can reduce the vibration from welfare vehicle floor and mitigate mental fatigue of the person on the wheelchair.
社団法人日本機械学会の論文
2003-06-04