新型旋转式压电惯性电机振子的冲击振动分析

Impact vibration analysis for vibration of a new rotary piezoelectric inertia motor

新型旋转式压电惯性电机,是一种利用压电双晶片振子作为驱动元件,利用锯齿波作为激励电信号产生惯性冲击力的旋转电机。研究压电惯性电机振子在pzt元件激励下的冲击受迫响应。推导出了压电陶瓷片两端电压响应方程,以及压电振子梁的冲击受迫响应方程。分析了激励信号频率对振子梁端部响应的影响规律。同时,分析了不同激励信号占空比情况下振子梁端部响应变化规律,以及结构参数对电机驱动力矩的影响规律。分析了提高电机驱动力矩的有效途径。

In a new rotary piezoelectric inertia motor piezoelectric bimorphs were employed as drive components and an electrical signal with saw-tooth wave was used to excite an inertia impulse. Here, the impact forced response of a vibrator of a piezoelectric inertia motor excited by pzt components was studied. The voltage response equation at the twoends of the piezoelectric element and the piezoelectric vibrator-beam impact forced response equation were deduced. The effects of excitation signal frequency on the end responses of the vibrator-beam were analyzed. Meanwhile, the end response law of the vibrator-beam under different duty cycles of excitation signal, and the effect of structural parameters on the driving torque of the motor were analyzed. The effective way to improve the motor driving torque was explored.