用于工业CT的电液位置控制系统模糊PID研究

摘要

工业CT是广泛应用于工业产品无损检测的一种检测技术,为了提高其成像精度与扫描效率,需要对其加载系统的位置进行精确控制.为此,基于工业CT试验台的位置控制系统建立数学模型,应用MATLAB/Simulink的传统PID和模糊PID控制模块进行试验设计和仿真分析,最后利用上位机的LabVIEW平台建立控制模块,验证控制策略的有效性.试验中,模型PID的相对误差稳定在1％ ～6％之间,由此证明所设计的模糊PID控制器的跟踪性能良好,可以满足工程实际应用.这种控制策略达到工业CT位置控制精度的需求,可以为工业CT试验台位置控制系统的设计提供参考.%Industrial CT is a kind of detection technology widely used in nondestructive detecting of industrial products.In order to improve its imaging accuracy and scanning efficiency,the loading system position should be precisely controlled.The mathematical model has been established based on the position control system experiment platform of industrial CT experiment platform.The traditional PID and fuzzy PID control module of MATLAB / Simulink have been used for experimental design and simulation analysis.Finally,the control module has been established by using the LabVIEW platform of the host computer,so as to verify the effectiveness of the strategy.In the experiment,the relative error of fuzzy PID is maintained at 1％ ～ 6％,which proves that the designed fuzzy PID controller has a good tracking performance and can meet the practical engineering application.The proposed control strategy met the needs of industrial CT position control accuracy,which can provide references for the design of position control system for industrial CT test bench.