Plant parameter identification under relay control

Author

Atherton, Derek P. ; Majhi, S.

Author_Institution

Sch. of Eng., Sussex Univ., Brighton, UK

Volume

2

fYear

1998

fDate

16-18 Dec 1998

Firstpage

1272

Abstract

A set of general expressions are derived from a single asymmetrical relay feedback test for online process identification. Using these expressions the exact parameters of open loop stable and unstable first order plus time delay (FOPDT) and second order plus time delay (SOPDT) transfer function models may be obtained from simple measurements made on the limit cycle. The SOPDT process may also possess a `stable´ or `unstable´ zero. The expressions remain valid for an odd symmetrical limit cycle. Examples are given to illustrate the value of the proposed general identification method

Keywords

feedback; limit cycles; parameter estimation; relay control; transfer functions; asymmetrical relay feedback test; odd symmetrical limit cycle; online process identification; open loop stable transfer function model; plant parameter identification; relay control; second order plus time delay transfer function models; unstable first order plus time delay transfer function models; Delay effects; Feedback; Genetic expression; Limit-cycles; Open loop systems; Parameter estimation; Relays; Testing; Time measurement; Transfer functions;

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.1998.758453

Filename

758453