Research on fuzzy self-adaptive PI-Smith control in long time-delay system  

作　　者：WEI Qiu-yue WANG Wen-qing 

机构地区：[1]School of Automation, Xi＇an University of Posts and Telecommunications, Xi＇an 710121, China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2011年第5期114-117,128,共5页中国邮电高校学报（英文版）

基　　金：supported by the Natural Science Foundation of Shaanxi Province (2007F18);the Scientific Research Program of Shaanxi Provincial Education Department (2010JC19)

摘　　要：The long time-delay often exists in industrial process. In order to overcome the big overshoot and long regulating time of the long time-delay system control, a new fuzzy self-adaptive PI-Smith control method is proposed. This method combines the Smith predictive control with fuzzy self-adaptive proportional-integral （PI） control. The traditional proportional-integral-derivative （PID） controller in Smith predictive control is replaced by fuzzy PI controller which utilizes the principle of fuzzy control to tune parameters of PI controller on-line. The results of simulation for electric furnace show that the method has the advantages of shortening regulating time, no overshoot, no steady-state error, excellent control accuracy, and good adaptive ability to the change of system model.The long time-delay often exists in industrial process. In order to overcome the big overshoot and long regulating time of the long time-delay system control, a new fuzzy self-adaptive PI-Smith control method is proposed. This method combines the Smith predictive control with fuzzy self-adaptive proportional-integral （PI） control. The traditional proportional-integral-derivative （PID） controller in Smith predictive control is replaced by fuzzy PI controller which utilizes the principle of fuzzy control to tune parameters of PI controller on-line. The results of simulation for electric furnace show that the method has the advantages of shortening regulating time, no overshoot, no steady-state error, excellent control accuracy, and good adaptive ability to the change of system model.

关 键 词：SELF-ADAPTIVE fuzzy PI control Smith predictive control long time-delay 

分 类 号：TP273.4[自动化与计算机技术—检测技术与自动化装置] TP273[自动化与计算机技术—控制科学与工程]