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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Evaluation of the effect of preload force on resonance frequencies for a traveling wave ultrasonic motor
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Evaluation of the effect of preload force on resonance frequencies for a traveling wave ultrasonic motor

机译：预载力对行波超声电机共振频率影响的评估

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摘要

In this paper, a novel method of numerical computation of the natural frequencies, depending on the most important running parameters for an ultrasonic motor, is described. The analyzed configuration by the Space Division of Alenia Spazio, Rome, within an Italian Space Agency (ASI) development program, is the flexural traveling wave one. The dynamic equations for the stator and the rotors of the ultrasonic motor are assumed into a differential system, whose equations are coupled by terms that represent interface generalized forces. In order to calculate natural frequencies of the motor-coupled terms of the equations are worked out with respect to the variables of the degrees of freedom. Hence, the mass, damping, and stiffness matrix for the whole system are obtained, then resonance frequencies, depending on the most important running parameters such as axial preload of the motor, are calculated. The results are compared with numerical ones, obtained by a finite element modeling (FEM) model, showing a good agreement.
机译：在本文中，描述了一种新的自然频率数值计算方法，该方法取决于超声电机最重要的运行参数。罗马的阿莱尼亚·斯帕齐奥（Alenia Spazio）太空部门在意大利航天局（ASI）的开发计划中分析的配置是弯曲行波。将超声电机的定子和转子的动力学方程式假定为差分系统，该系统的方程式由表示界面广义力的项耦合。为了计算电动机耦合项的固有频率，针对自由度的变量进行了计算。因此，获得了整个系统的质量，阻尼和刚度矩阵，然后根据最重要的运行参数（例如电动机的轴向预载）计算出共振频率。将结果与通过有限元建模（FEM）模型获得的数值结果进行比较，显示出良好的一致性。

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