Life prediction model of friction material for traveling wave ultrasonic motor

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI:10.3901/JME.2011.01.096

Xiu Tian, J. Qu, Jian-chun Li, Yan-li Wang, Yuedong Lang

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引用次数: 3

Abstract

Traveling wave ultrasonic motor (TWUSM) relies on friction force for torque transmission. Wear often exists on friction material (FM) inevitably, and largely affects life of TWUSM. A new life prediction model of FM for TWUSM was proposed. Compared with standing wave USM, wear of TWUSM FM was resulted from scratching of traveling wave crests on stator. Considering motion of a particle in contact interface between stator and rotor, visco-elastic polymer contact model was used to calculate normal pressure distribution and relative sliding speed, which were introduced to traditional wear law of Archard. In the model, special relation between time and distance for traveling wave was used to analyze contact intervals. The change of thickness of FM during service which made decrease of preload was also taken into account. Parameters of common disc-type TWUSM were used to compute life prediction curve, and meanwhile the experimental investigation was carried out. The life prediction result found out to be consistent with the test.

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行波超声电机摩擦材料寿命预测模型

行波超声电机(TWUSM)依靠摩擦力传递转矩。摩擦材料不可避免地存在磨损，并在很大程度上影响TWUSM的使用寿命。提出了一种新的TWUSM调频寿命预测模型。与驻波超声电机相比，驻波超声电机的磨损主要是由于定子上行波峰的刮擦造成的。考虑粒子在定子和转子接触界面的运动，采用粘弹性聚合物接触模型计算正态压力分布和相对滑动速度，将其引入到传统的Archard磨损规律中。该模型利用行波的时间与距离的特殊关系来分析接触间隔。同时考虑了使用过程中调频板厚度的变化对预紧力的影响。利用普通盘式超声电机的参数计算了其寿命预测曲线，并进行了实验研究。寿命预测结果与试验结果一致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)

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