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中文摘要：
提出了行波型超声马达振动减摩的几何模型，采用电磁电机驱动、电磁电机结合一路驻波振动驱动及行波型超声马达驱动3种驱动方式模拟行波型超声马达摩擦驱动特点，借助超声马达摩擦特性模拟试验装置，引入摩擦系数降低率的概念，研究了电机转速、预压力、超声波激励电压和摩擦材料等对定、转子摩擦副摩擦系数的影响，结果表明：在较高相对滑动速度、小预压力及大振幅条件下，超声波振动减摩现象显著。
英文摘要：
A geometric model of friction reduction of ultrasonic vibration based on traveling wave ultrasonic motor （TWUSM） is presented. Three driving conditions were adopted to drive the rotor of TWUSM to simulate the frictional driving characteristics of the TWUSM, which was driven by electromagnetic motor, by electromagnetic motor combining with one phase standing ultrasonic wave, and by TWUSM respectively. The experimental rig was used to simulate the friction characteristics of the TWUSM. A conception of friction coefficient reduction rate of ultrasonic vibration was introduced. Effects of the speed of electromagnetic motor, pre-load, exciting voltage and friction materials on friction coefficient of the friction couple of stator and rotor are experimentally investigated respectively. The phenomena of friction reduction in ultrasonic drive was obvious at high relative sliding speed, small pre-load, and large vibration amplitude of ultrasonic vibration.
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