基于两级Smith预估的黑液浓度模糊串级控制系统设计  

The Design of Fuzzy Cascade Control System for Black Liquor Concentration Based on Two Level Smith Predicion

作　　者：尤斌[1] 彭晗[2] 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]南京林业大学化学工程学院,江苏南京210037

出　　处：《造纸科学与技术》2013年第3期62-66,共5页Paper Science & Technology

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：针对黑液浓度具有大滞后、大时变、非线性以及精确模型难以建立等特性导致的工况复杂、控制难度大的问题,提出基于主副回路Smith预估补偿的模糊串级控制,在主副回路分别加入Smith预估器,对黑液浓度和蒸汽流量进行补偿,并利用模糊控制器为主调节器。仿真结果表明,该种控制方案相比传统的PID串级控制方案具有更有的动态特性和鲁棒性。实际生产中的应用同样验证了其可靠性。According to the characteristics of black liquor concentration,such as big timedelay, big timevarying, nonlinear, and hard to get an accurate mathematical model, a cascade fuzzy control method based on Smith predic tors is proposed. Two different Smith predictors are added in the main and subsidiary of the system separately to compensate the pure lag of the black liquor concentration and steam flow and Fuzzy controller is used as the main controller. Simulation result shows that the proposed method is much better than the traditional PID cascade control method in dynamic performance and robustness. The application in actual production verifies its reliability.

关 键 词：模糊串级控制 SMITH预估器 主调节器 

分 类 号：TS736.3[轻工技术与工程—制浆造纸工程]