液体媒质超声波电机的特性仿真与实验研究

为了深入研究液体媒质超声波电机的转速特性，通过阐述电机运行过程中将超声振动所产生的能量由液体传递给转子，从而驱动转子旋转这一能量传递的基本过程，揭示了液体中的雷诺切应力是电机声流场的驱动力．然后，以此为基础，对液体声流场进行了系统的理论解析，并将声流场同电机转速联系起来，针对电机转速与驱动频率、驱动电压、液体环境和转子半径之间的关系进行了Madab仿真与实验研究．比较分析仿真与实验结果可知，二者具有很好的一致性，验证了本文假设的合理性和仿真方法的正确性．

Characteristic Simulation and Experiments of Ultrasonic Motor Driving Fluid Directly

To investigate the rotating speed characteristics of ultrasonic motor driving fluid directly, the energy transferring course was discussed, during which the energy produced by the ultrasonic vibration was transferred to the rotor through the fluid medium. The shearing Reynolds' stress was revealed as the driving force of the fluid flow. After that, the acoustic streaming field was theoretically analyzed and the relationship between the acoustic streaming velocity and the rotating speed of the motor was set up. Finally the relationships between the rotating speed and the driving frequency, the driving voltage, the fluid circumstances, and the rotor radius were tested through Matlab simulation and experiments. The identity between the simulation and experimental results proves that the hypotheses in this paper are reasonable and the method used in the simulation is correct.