Analysis and design of partially decentralized controllers

Author

Lou, Guannan ; Tan, Wen

Author_Institution

Sch. of Control & Comput. Eng., North China Electr. Power Univ., Beijing, China

fYear

2011

fDate

23-25 May 2011

Firstpage

623

Lastpage

628

Abstract

It is well-known that decentralized controllers may not achieve desired performance for a strongly-coupled multivariable process, and multivariable controllers are usually complex in structure and difficult to implement in practice, so partially decentralized controllers (PDC) may be used to improve the performance while retaining the simplicity of decentralized controllers. In this paper, a partially decentralized controller is designed for a distillation column. The PDC structure is analyzed via Gramian based interaction measure, and an expansion method is used to design the PDC. Robust stability of the closed-loop control system under the PDC is analyzed via the structure singular value method. Simulation results show that the PDC can achieve better performance and robustness than decentralized controllers.

Keywords

MIMO systems; closed loop systems; control system analysis; control system synthesis; decentralised control; distillation equipment; robust control; Gramian based interaction measure; closed loop control system; distillation column; expansion method; multivariable controller; partially decentralized controller analysis; partially decentralized controller design; robust stability; strongly-coupled multivariable process; structure singular value method; Complexity theory; Controllability; Distributed control; MIMO; Observability; Robustness; Expansion independent design method; Gramian interaction measure; Non-square internal model Control; Partially decentralized control (PDC); Robustness;

fLanguage

English

Publisher

ieee

Conference_Titel

Control and Decision Conference (CCDC), 2011 Chinese

Conference_Location

Mianyang

Print_ISBN

978-1-4244-8737-0

Type

conf

DOI

10.1109/CCDC.2011.5968257

Filename

5968257