BLT Method for PI Controllers of Unstable Systems

作     者：Besta, Chandra Shekar Chidambaram, Manickam 

作者机构：Indian Inst Technol Proc Control Grp Dept Chem Engn Chennai 600036 India 

出 版 物：《INDIAN CHEMICAL ENGINEER》 (印度化学工程师)

年 卷 期：2018年第60卷第4期

页      面：317-337页

核心收录：

学科分类：0817[工学-化学工程与技术] 08[工学] 

主　　题：Unstable Systems BLT Centralized Controllers Diagonal Controllers PI controllers 

摘      要：The biggest log modulus tuning (BLT) method is extended to unstable systems. The method is modified to design (i) decentralized Proportional-Integral (PI) controllers and (ii) centralized PI controllers for two-input two-output (TITO) systems. A method is given to specify the value for L-cm(max). The internal model controller using Tanttu and Lieslehto method is applied for centralized controller design. The detuning parameter (F) is selected for both the schemes (centralized controller and decentralized controller) to get the value of BLT as + 12 dB. Simulation studies are carried out for two TITO systems to evaluate the performance of both the proposed schemes. The centralized controllers produce superior performances and decreased interactions over the decentralized PI controllers. The present method gives robust performances.