Partial internal model control

Author

Wang, Qing-Guo ; Bi, Qiang ; Zhang, Yong

Author_Institution

Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore

Volume

48

Issue

5

fYear

2001

fDate

10/1/2001 12:00:00 AM

Firstpage

976

Lastpage

982

Abstract

Internal model control (IMC) is a well-known and effective control scheme. However, when unstable processes are concerned, the original IMC structure cannot be directly used for control system implementation. In this paper, a new scheme called partial internal model control (PIMC) is proposed, which is capable of controlling both stable and unstable processes. In PIMC, a process model is expressed as the sum of the stable and antistable parts and only the stable part of the process model is used as the internal model. The process stable part is canceled by the internal model and the remaining antistable part is stabilized and controlled with a primary controller, which is usually a PID-type regulator when the antistable part is of a low order. Various properties of a PIMC system such as internal stability and robust stability are analyzed. The design of PIMC is discussed in detail. Various simulation examples are included for illustration and a real-time implementation on a motor system is presented

Keywords

DC motors; control system analysis; control system synthesis; machine control; process control; robust control; servomotors; three-term control; DC servomotor system; PID-type regulator; antistable part; internal model control; internal stability; partial internal model control; primary controller; real-time implementation; robust stability; stable processes control; unstable processes control; Bismuth; Control systems; Electrical equipment industry; Open loop systems; Predictive models; Regulators; Research and development; Robust stability; Robustness; Stability analysis;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.954562

Filename

954562