超音波モータにおける副振動片の最適設計

概要

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In order to increase the rotational speed of an ultrasonic motor using a flexural traveling wave, slits made on the surface of the stator are very effective. In this paper the projections made by the slits are called "sub-reeds" for convenience. Though the sub-reeds play important roles in an ultrasonic motor, their dimensions are generally decided through trial and error. This paper presents the optimum design method of a sub-reed by using elastic vibration analysis. This method calculates the dimensions of the sub-reed of which resonant frequency is same as that of the basic disc. This paper also presents that the resonance of the sub-reed mainly causes the magnification of the amplitude by using finite element analysis. The optimum design method and the mechanism of the magnification mentioned above are confirmed by experiments.
公益社団法人精密工学会の論文
1991-01-05