Exploring the Mechanism of Friction and Wear of Ultrasonic Motors.

1.试验用摩擦材料的制备。(1)工程塑料和陶瓷。（碳纤维增强塑料、Al_2O_3、Si_3N_4、SiC和ZrO_2）2.对超声电机用摩擦材料的磨损进行了测试。(1)通过磨损试验机3测量磨损。磨损试验用超声波电机的制作（1）采用混合换能器型超声波电机进行磨损试验.磨损仿真模型及磨损评价。(1)将实测磨损体积与模拟值进行了比较和评价。(2)两种类型的摩擦材料的磨损特性被发现。(3)该模型可用于摩擦材料寿命的粗略估算。(4)本文的仿真结果可适用于多种类型的超声电机和多种类型的摩擦材料.真空摩擦磨损试验。(1)在真空环境下进行了磨损试验。(2)找到了相对较好的真空组合.（1）润滑剂可以用来改善超声波电机的摩擦和磨损特性。(2)获得了较高的驱动效率。

1. Preparation of friction materials for the test.(1) Engineering plastics and Ceramics. (Carbon-fiber-reinforced-plastics, Al_2O_3, Si_3N_4, SiC and ZrO_2)2. Testing the wear of the friction materials used for the ultrasonic motors.(1) Wear was measured by the wear testing machine3. Fabrication of the ultrasonic motor for the wear test(1) A hybrid transducer type ultrasonic motor was used for the wear tests.4. The wear simulation model and the wear evaluation.(1) Measured wear volumes and simulated values were compared and evaluated the results.(2) Two types of wear characteristics for the friction materials were found.(3) Our simulation model can be used for the rough estimation of the life of friction materials.(4) Our simulation may be applicable for many types of ultrasonic motors and many types of friction materials.5. Friction and wear test in vacuum.(1) Wear test was curried out in vacuum environment.(2) Relatively good combination for vacuum was found.6. Lubricant usage on the sliding surfaces(1) Lubricant can be used to improve friction and wear characteristics of the ultrasonic motor.(2) High driving efficiency was obtained.