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标题：纵扭复合型超声波电机纵振动仿真模型 |
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作者：龚书娟，张长青，孟庆海 |
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| 2017年第4期 访问次数：327次 |
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摘要：根据纵扭复合型超声波电机的纵振动数学模型，建立了基于Matlab的Simulink仿真模型。分析了预压力、摩擦材料厚度、激振力幅值等参数改变情况下，电机的纵振动变化过程。仿真结果表明：分别增大预压力和摩擦材料厚度，则接触角增大，转子位移减小，定子位移基本不变，但冲击力会随着预压力的增大而增大，随摩擦材料厚度的增大而减小；随着激振力幅值的增大，定子位移、转子位移、冲击力均增大，但接触角减小； 激振力的三次谐波成分对纵振动的影响可以忽略。Fc-hf关系曲线给出了定转子全程接触的临界条件。仿真结果为超声波电机设计提供一定的理论分析基础。
关键词：仿真模型；纵振动；超声波电机
Abstract: Based on longitudinalvibration mathematical model of the hybrid longitudinaltorsional ultrasonic motor, a simulation model was constructed. The longitudinalvibration process of the motor were derived by simulation with the consideration of parameters such as the preload and the thickness of friction materials as well as the amplitude of exciting force. The conclusions are: By increasing the preload and the thickness of friction materials separately, the contact angle of stator to rotor increases, the rotor vibration displacement decreases but the stator vibration displacement remains the same level. But the amplitude of impulsive force increases with the increase of the preload and decreases with the increase of the thickness of friction materials; With the increase of the amplitude of exciting force, the stator vibration displacement and the rotor vibration displacement as well as the amplitude of impulsive force increases but the contact angle of stator to rotor remains at same level; The simulation also shows that the triple harmonic of exciting force has negligible effect on longitudinalvibration . The Fchf curve is given for the critical condition of totaltouch of stator and rotor. The simulation result is helpful for the design of a hybrid longitudinaltorsional ultrasonic motor.
Key words: simulink model；longitudinalvibration；ultrasonic motor |
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