基于DSP的高频电液激振台控制器

High-frequency electro-hydraulic vibration system controller based on DSP

为了实现对2D电液伺服阀双自由度的控制,将DSP技术应用到高频电液激振台控制系统的构建中。通过对步进直线电机和同步伺服电机的调控,实现了对2D电液伺服阀阀芯开口的精确定位和对阀芯转速的控制,同时实现了与上位机的通信。利用数字滤波对采集信号进行处理,提高了控制精度,并通过控制算法实现了在非线性失真下的跟踪控制,消除了电机失步和速度突变。详细阐述了控制系统的硬件结构和软件设计。实验结果表明,该控制系统稳定可靠,能随着阀芯轴旋转运动和轴向滑动实现激振频率和幅值的独立控制。

Abstract： In order to solve the problems of the two-dimensional control valve＇ s common control of double degrees of freedom, the high-frequency electro-hydraulic vibration system based on the technology of DSP was investigated. The control of the valve spool＇ s position and speed accurately was realized through the control of the linear stepper motor and the servomotor, and the communication with the host comput- er was realized. The acquired signal was processed with digital filter to improve the precision of the control. The control algorithm was used to prevent the motor out of step and to eliminate the speed mutations in the case of＂ nonlinear distortion. The hardware and software configuration was illustrated in detail. The experimental results show that the system works stably , the rotary and sliding motions are independently exploited to control the frequency and the magnitude of the agitated vibration respectively.