基于虚拟仪器的滑动型压电惯性电动机测控系统

摘要

Piezoelectric inertial driving mechanism is driven under an asymmetrical triangle waveform,producing a millimeter scale stroke even nanometer scale stroke,and the velocity and displacement are generated.The velocity and displacement are known as two important parameters to research the motor's performance.In order to research the mechanism performance better,smooth impact drive mechanism using a multi-layered piezoelectric actuator was researched and a test system was designed and set up by equipments of laser displacement sensor,data acquisition board and power amplifier,based on virtual instrument technology.The software system included four modules,namely data acquisition module,data processing module,generated waveform production module and excited waveform transmission module.The information of every module is conveyed by data flow.The output parameters of mechanism were researched under different driving input.The experiment shows that the mechanism has a moving velocity of 0.2 mm/s by triangle signal at amplitude of 12 V(peak-topeak value) and frequency of 800 Hz.The test system works steadily and has a high accurate measurement.%压电惯性电动机在不对称三角波形的驱动下,会产生微米量级甚至纳米量级的步距,进而输出速度和位移.为了更好地研究电动机的输出性能,以滑动型压电惯性电动机为研究对象,利用激光位移传感器、数据采集卡和功率放大器等设备,基于虚拟仪器技术设计并搭建了一个测控系统,软件系统包括4个模块:数据采集模块、数据处理模块、激励波形产生模块和激励波形传输模块,各模块以数据流的方式进行信息传递,研究了在不同输入条件下的电动机的输出参数.经过实验表明,当输入电压为12V(峰峰值)且输入频率为800 Hz时,电动机的移动速度0.2 mm/s,测控系统工作稳定,测量精度高.