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

SHAO Hanqing，RUAN Jian，LI Sheng ，HU Wei, WANG Xiaowen

(Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology,
Ministry of Education,Zhejiang University of Technology, Hangzhou 310014, China)

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 computer 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.

Key words: digital signal processor(DSP)；motor control；high frequency electrohydraulic vibration