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首页> 外文期刊>Sensors and Actuators, A. Physical >Transient wave motion analysis for modal suppression of a circular cylindrical wedge wave ultrasonic motor
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Transient wave motion analysis for modal suppression of a circular cylindrical wedge wave ultrasonic motor

机译：瞬态波动分析对圆柱形楔形波超声电机的模态抑制

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摘要

This paper describes a modal suppression method for improving the transient wave motion responses of a wedge wave ultrasonic motor (WW-USM). Typically, an ultrasonic motor operates near the resonant frequency of a specific vibration mode that must be adequately separated from the resonant frequencies of other modes. In the developed prototype, longitudinal modes accompany a transient response to the designed flexural mode, because electrodes are placed at the half-wavelength around the piezoelectric lead zirconate titanate tube (PZT tube). An uncertain disturbance can be easily induced at the instant in which the motor is switched on or off, or when the direction of the motor is changed. This study proposes a modification of the electrode arrangement for suppressing these unexpected modes. The simulation and experimental results indicated that performance improved when the electrodes were placed over the entire-wavelength around the PZT tube. When the longitudinal mode produced by exciting the WW- USM was suppressed, the transient response of the revolution speed became quicker and smoother than that obtained using the previous design. The proposed modification increased the maximal output power and efficiency of the mechanical-electrical transformation by 21%.
机译：本文介绍了一种模态抑制方法，用于改善楔形波超声电动机（WW-USM）的瞬态波运动响应。通常，超声马达在特定振动模式的谐振频率附近运行，该特定振动模式必须与其他模式的谐振频率充分分开。在已开发的原型中，纵向模式伴随着对设计挠曲模式的瞬态响应，因为电极被放置在压电锆钛酸铅钛酸盐管（PZT管）周围的半波长处。在打开或关闭电机的瞬间或更改电机方向时，很容易引起不确定的干扰。这项研究提出了一种用于抑制这些意外模式的电极布置的改进方案。仿真和实验结果表明，将电极放置在PZT管周围的整个波长上时，性能得到改善。当通过激励WW-USM产生的纵向模式被抑制时，转速的瞬态响应变得比以前的设计更快，更平稳。提出的修改将最大输出功率和机电转换效率提高了21％。

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