基于DSP与FPGA粘滑式压电驱动器的控制系统研究  

Research on Control System of Adhesive Sliding Piezoelectric Driver Based on DSP and FPGA

作　　者：温尚林 刘曰涛[1] 于智勇 祝保财 邹大林 WEN Shanglin;LIU Yuetao;YU Zhiyong;ZHU Baocai;ZOU Dalin(School of Mechanical Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学机械工程学院,山东淄博255049

出　　处：《压电与声光》2024年第6期942-949,955,共9页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(No.51805299)。

摘　　要：以提高粘滑式压电驱动器的输出性能和重复定位精度为目的,提出了一种以数字信号处理器(DSP)和现场可编程门阵列(FPGA)为核心的粘滑式压电驱动器的控制器。对FPGA与DSP硬件与软件进行设计:FPGA实现直接数字合成(DDS)技术产生驱动信号,搭配后续的高电压动态放大电路,可使压电陶瓷快速充、放电,从而实现粘滑运动;DSP接收输入及反馈信号并对其进行计算与判别,从而控制信号发生器产生频率不同、电压不同的驱动信号。反馈模块选择合适的光栅编码器后形成完整的闭环控制系统。搭建实验平台进行性能测试,当驱动频率为2.5 kHz、驱动电压幅值在120 V、负载为4 g时,最大速度为9.782 mm/s,重复定位精度为0.1μm。To improve the output performance and repeat positioning accuracy of a stick-slip piezoelectric actuator,a controller based on digital signal processor(DSP)and field-programmable gate array(FPGA)was proposed.The hardware and software of the FPGA and DSP were developed,with the FPGA utilizing direct digital synthesis(DDS)technology to generate driving signals.Combined with a high-voltage dynamic amplification circuit,the piezoelectric ceramic was rapidly charged and discharged,enabling stick-slip motion.This motion controlled the signal generator,allowing it to produce driving signals with varying frequencies and voltages by calculating and interpreting the received input and feedback signals.The feedback module incoperates an appropriate grating encoder to form a closed-loop control system.An experimental platform was built to conduct performance testing.When the driving frequency was 2.5 kHz,the driving voltage amplitude was 120 V,and the load was 4 g,the maximum speed achieved was 9.782 mm/s,and the repeat positioning accuracy reached 0.1μm.

关 键 词：粘滑原理 压电驱动器 DSP FPGA DDS技术 

分 类 号：TN384[电子电信—物理电子学] TP27.3[自动化与计算机技术—检测技术与自动化装置] TN304.9[自动化与计算机技术—控制科学与工程]