变论域模糊自整定PID内模控制在主汽温控制系统中的应用研究  

An application study of the variable universe fuzzy logic control integrated with the self-tuning PID internal model control used in a main steam temperature control system

作　　者：张明光[1] 王鹏[1] 王兆刚[1] 牛永[1] 

机构地区：[1]兰州理工大学电气与信息工程学院,甘肃兰州730050

出　　处：《工业仪表与自动化装置》2008年第3期21-24,共4页Industrial Instrumentation & Automation

基　　金：国家863计划科学发展基金资助(2002BA901A28)

摘　　要：火电厂主汽温控制系统具有大惯性、大延迟和时变等特性,采用常规PID串级控制方法难以获得满意的控制效果。通过引入1/1pade级数逼近纯滞后环节,将内模控制转换为常规PID控制器的参数的整定,运用变论域模糊控制原理来整定PID参数,从而实现了变论域模糊自整定PID内模控制。它充分综合了变论域模糊控制、内模控制、PID控制的优点。通过对锅炉过热蒸汽温度控制系统的仿真研究表明,变论域模糊自整定PID内模控制的控制效果优于常规的PID串级控制,它能适应对象参数的变化,具有较强的鲁棒性和自适应能力,控制品质好。The main steam temperature control system is a large inertial, large time-delay and timevarying system. The control result is not satisfied by using a conventional PID cascade control method. Through the introducing of the 1/1 pade series approximate to the time delay unit and,the internal model control （IMC） can be changed into the parameter setting of the conventional PID controler . Then by using the variable universe fuzzy inference to tune the PID parameters, the variable universe fuzzy self-tuning PID internal model control （FIMC） is realized. The FIMC integrates itself with the advantages of the variable universe fuzzy control, IMC and PID control. A simulation study of the main steam temperature control system shows that the FIMC performance is better than the conventional PID control. It has stronger robustness and better self-adaptive ability, which can be adaptive to the change in the parameters of the controlled plant.

关 键 词：变论域模糊控制 模糊自整定PID控制 PID串级控制 主汽温系统 

分 类 号：TP273.4[自动化与计算机技术—检测技术与自动化装置] TS736[自动化与计算机技术—控制科学与工程]