直线超声电机特性测试系统的设计及试验
Design and Experiment of Testing System of Characteristics of Linear Ultrasonic Motor

针对现有直线超声电机特性测试系统存在的测试精度低、功能单一和自动化程度低的问题，笔者设计了一种直线超声电机特性测试系统，主要由电机驱动模块、数据采集模块和测试控制及数据处理模块3部分组成。电机驱动模块以STM32F429微控制器为核心，可方便实现对驱动信号的电压、相位以及频率等参数调节；数据采集模块主要由位移传感器、拉压力传感器和高速数据采集卡组成；测试控制数据处理模块主要由PC机实现。利用该系统对一种蝶形直线超声电机的机械特性和瞬态特性进行了测试，结果表明：该系统可很好地实现对直线超声电机的特性测试，而且操作简便，易于扩展。
Aiming at the problems of low precision, single function and low degree of automation in the existing testing system of characteristics of linear ultrasonic motor, a test system of characteristics is designed for measuring mechanical and transient characteristics of linear ultrasonic motor, which is mainly composed of motor drive module, data acquisition module, test control and data processing module. The motor drive module mainly takes the STM32F429 micro-controller as a core controller, which can conveniently realize multi-parameter adjustment of its drive signal. The data acquisition module is mainly composed of a displacement sensor, a tension-compression sensor and a high speed data acquisition card. The test control and data processing module are mainly realized by a computer. The mechanical and transient characteristics of the “butterfly” type linear ultrasonic motor are tested by using the system. The results show that the system can well achieve the measurement of characteristics of linear ultrasonic motor, and can be conveniently operated and easily expanded.