速度正帰還によって発生する自励振動を利用した生体動剛性の測定(機械力学,計測,自動制御)

概要

論文の詳細を見る
This paper describes the measurement method of dynamic stiffness of subcutaneous tissues. After the ball indenter which is attached to the Voice Coil Motor (VCM) is pressed against body surface with any preload, the mass-spring-damper system is constructed between the subcutaneous tissues and the VCM. When the VCM is controlled with positive feedback of velocity, self-excited vibration is occurred. Spring constant of the subcutaneous tissues is identified with this resonance frequency of the system. Further, the VCM is controlled to realize the constant amplitude of velocity using a variable velocity feedback gain. Damping coefficient of the subcutaneous tissues is identified with velocity feedback gain. This method can be realized as a real time system, and accordingly measures time-varying dynamic stiffness of subcutaneous tissures.
一般社団法人日本機械学会の論文
2004-09-25