VTR用ガイドローラの鳴きと振動特性 : 第2報,数値シミュレーション(機械力学,計測,自動制御)

概要

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Vibration characteristics of whirling motion of a VTR (video tape recorder) guide roller are investigated by numerical simulation and experiments. The previous experimental study shows that a high frequency forward whirl of a VTR guide roller due to friction between the guide roller and shaft causes squeal sound of the guide roller during high speed rewinding operation. In this study, a two-dimensional dynamic simulation model of a guide roller-shaft-tape (belt) system is proposed together with five equations of motion, and steady and transient vibrations of the roller and shaft are calculated. The results show that the roller center executes a swing motion around a certain point on a clearance circle when no disturbance is given to the roller. After giving a disturbance to the roller, the large amplitude and high frequency forward whirl of the roller occurs after several contacts with the shaft and this simulated process has a good agreement with the experimental results. The increase in the friction coefficient and stiffness of the shaft develops the forward whirl and the increase in the clearance and the contact stiffness between the roller and shaft and the roller mass has the opposite effects.
一般社団法人日本機械学会の論文
2004-12-25