Design And Implementation Of Controller In Active Vibration Isolation Platform

With the increasing development of precision measuring and machining equipment, thevibration of environment has become an increasingly highly important factor that affects theof precision measurement and processing.This thesis analyzes and designs a multi-channel and high-speed controller for activevibration isolation system based on national key research projects-development of precisionvibration isolation system. The controller meets the requirements in precision vibrationisolation system.Firstly, this thesis introduces the operation of six degrees of freedom active vibrationisolation platform including mechanical structure, hardware, sensors and signal chain.Secondly, the thesis designs a controller based on dual-core architecture, DSP(DigitalSignal Processor)+FPGA(Field－Programmable Gate Array), to solve the contradictionamong high speed, high accuracy and multi-channel.Thirdly, hardware of the controller including DSP subsystem, FPGA subsystem,DAC(Digital-to-Analog converter)module, ADC(Analog-to-Digital converter) module, I/Ointerface, RS-232communication, TCP/IP LAN communications, high-speed parallel businterface and power supply circuits in active vibration isolation system is accomplished bythe thesis. Then, the corresponding software including air control loop, position control loop,velocity control loop, algorithm filtering, real-time communication, GUI (graphical userinterface) is built successfully.At last but not least, an active vibration isolation system experimental platform is builtto verify the validity of controller. Then, the inner sensors and LMS test platform are usedto tell the results.Under the control of controller designed in this thesis the active vibration isolation system has achieved isolation rate44%(greater than2Hz) and82%(greater than30Hz)within the positioning error.