基于前馈模糊反馈的苛化温度控制系统设计  

Design of Temperature Control System in Causticizing Process Based on Fuzzy Feed-forward Feed-back Control

作　　者：尤斌[1,2] 彭晗[3] 胡慕伊[1] 熊智新[1] 

机构地区：[1]南京林业大学江苏省制浆造纸科学与技术重点实验室,江苏南京210037 [2]浙江中控系统工程有限公司,浙江杭州310053 [3]南京林业大学化学工程学院,江苏南京210037

出　　处：《中国造纸学报》2013年第3期54-58,共5页Transactions of China Pulp and Paper

基　　金：江苏省制浆造纸科学与技术重点实验室开放基金项目(201010)

摘　　要：针对苛化过程的大时滞、大惯性、参数时变等特点,对单回路苛化温度PID控制系统进行改进,设计了一种基于模糊逻辑的前馈反馈温度控制系统。同时分析了前馈反馈系统的局限性,探讨了Smith预估器在其中的应用。结合传统模糊PID反馈控制器,利用前馈控制补偿可测干扰——蒸汽压力对苛化温度的影响。仿真结果表明,与传统单回路控制相比,改进的控制系统具有更好的动态特性和鲁棒性。最后给出了该控制系统的应用实例,验证其具有良好的控制效果。Causticizing process is a large inertial, large time-delay, time-varying process with many random disturbances. Aiming at these problems, this paper improved the single-loop PID temperature control system and presentsed the feed-forward feed-back temperature control system based on fuzzy logic. This paper analyed the limit of applying the feed-forward feed-back system and discussed the application of Smith predictor. Combined with traditional fuzzy PID feed-back controller, the fuzzy feed-forward control system was applied to compensated the impact of vapor pressure on cansticizing temperature. Simulation result showed that improved control system was much better than the tra- ditional single-loop PID control system in dynamic performance and robustness. At last the paper also verified its excellent control effect by practical applications.

关 键 词：苛化过程 温度控制 前馈 模糊反馈 SMITH预估器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]