文献类型：期刊文献

英文题名：A novel double loop control model design for chemical unstable processes

作者：Cong, Er-Ding[1,2];Hu, Ming-Hui[1];Tu, Shan-Tung[1];Xuan, Fu-Zhen[1];Shao, Hui-He[3]

机构：[1]E China Univ Sci & Technol, Key Lab Pressure Syst & Safety, MOE, Shanghai 200237, Peoples R China;[2]Petrochina Jilin Petrochem Co, Beijing 132021, Jilin, Peoples R China;[3]Shanghai Jiao Tong Univ, Sch Elect Informat & Elect Engn, Shanghai 200240, Peoples R China

年份：2014

卷号：53

期号：2

起止页码：497

外文期刊名：ISA TRANSACTIONS

收录：;EI(收录号：20141117438783);WOS:【SCI-EXPANDED(收录号:WOS:000333789200034)】；

基金：This work is supported by the National Natural Science Foundations of China (51205133, 60974061), Shanghai Natural Science Foundation (11ZR1409000), Ph.D. Programs Foundation of Ministry of Education of China (20110074120007).

语种：英文

外文关键词：Process control; Model design; Computer simulation; Chemical unstable processes; Stability

摘要：In this manuscript, based on Smith predictor control scheme for unstable process in industry, an improved double loop control model is proposed for chemical unstable processes. Inner loop is to stabilize integrating the unstable process and transform the original process to first-order plus pure dead-time dynamic stable process. Outer loop is to enhance the performance of set point response. Disturbance controller is designed to enhance the performance of disturbance response. The improved control system is simple with exact physical meaning. The characteristic equation is easy to realize stabilization. Three controllers are separately design in the improved scheme. It is easy to design each controller and good control performance for the respective closed-loop transfer function separately. The robust stability of the proposed control scheme is analyzed. Finally, case studies illustrate that the improved method can give better system performance than existing design methods. (C) 2013 ISA. Published by Elsevier Ltd. All rights reserved.