基于双DSP和FPGA的行波超声波电动机测控系统

根据对行波超声波电动机(TUSM)测试和高精度控制的要求,设计了基于双DSP和FPGA的超声波电动机高性能测试控制平台.其中控制核心采用了双DSP结构,可以在对行波超声波电动机进行控制的同时,将必要的参数读取出来进行分析和研究;采用现场可编程门阵列(FPGA)的直接数字频率合成(DDS)电路来产生控制开关管导通关断的两相四路高精度PWM波,减轻了DSP的负担.驱动部分采用全桥电路对信号进行功率放大.该系统的优点在于实时性好、精度高、功能完备.最后以直径为60 mm的行波超声波电动机为例,测试分析了驱动频率、电压以及相位差等调节量对电机输出的影响,验证了该系统的性能.

Measuring and Controlling System for Traveling-Wave Ultrasonic Motors Based on Dual-DSP and FPGA

A high-performance test control platform of traveling-wave ultrasonic motor was developed based on dual-DSP and FPGA. The dual DSP control could not only control TUSM but also read out the necessary parameters for analysis and research at the same time. The FPGA was used to produce two pulse width modulation waves of high precision to drive switch tube by DDS technique,and the use of FPGA could also reduce the burden on the DSP. The full-bridge circuit was used in the part of drive. The advantages of the system are of good real time,full-featured high precision and high precision. Finally taking TUSM with 60 mm diameter of the stator as an example, its output performance was tested and analyzed in the conditions of different driving frequencies,voltages and phase differences,and the performance of this system was validated.