A new adaptive identification method of critical loop gain for multi-input multi-output plants

Author

Saeki, Masarni

Author_Institution

Div. of Machine Design Eng., Hiroshima Univ., Japan

Volume

4

fYear

1998

fDate

16-18 Dec 1998

Firstpage

3984

Abstract

A new identification method of the critical gain and the critical frequency is proposed. This method can be applied to a large industrial plant with many controllers, and the convergence of the identification procedure is guaranteed theoretically. This method is simple and is not sensitive to disturbances. It can be used for tuning the multiloop PID controllers by Ziegler-Nichols rule. Instead of using relay feedback, a saturation nonlinearity and a time-varying gain are inserted in the loop, and the gain is tuned by the difference signal between the input and the output of the saturation function so that a sinusoidal oscillation may continue

Keywords

MIMO systems; adaptive estimation; control system synthesis; convergence; three-term control; MIMO plants; Ziegler-Nichols rule; adaptive identification method; critical frequency; critical loop gain; identification procedure convergence; large industrial plant; multiloop PID controller tuning; saturation function; saturation nonlinearity; sinusoidal oscillation; time-varying gain; Convergence; Design engineering; Frequency; Industrial plants; Iterative methods; Regulators; Relays; Robustness; Three-term control; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Decision and Control, 1998. Proceedings of the 37th IEEE Conference on

Conference_Location

Tampa, FL

ISSN

0191-2216

Print_ISBN

0-7803-4394-8

Type

conf

DOI

10.1109/CDC.1998.761920

Filename

761920