Low Frequency Micro-Vibration Active Isolation Control System Design and Experimental Research

Abstract

Whether in the aerospace, or seismic exploration, as well as high precision operation of all trades and professions, low-frequency interference directly influences the instrument monitoring and detection precision, resulting in insufficient accuracy of the implementing agencies. The passive vibration isolation method was used by most high accuracy equipment at present, the efficiency of isolation can only achieve 60%-70%, that will have influence to the extremely precision equipment certainly. In this paper an active vibration control system was realized by using single-chip microcomputer and the PID control algorithm. System simulation model was built and experimental tests had been conducted. The interference eliminated more than 80% for 3Hz and below,can effectively improve the precision equipment to work under the low frequency interference.The system provided an effective method to suppress the low frequency interference.