A novel identification method for time delay processes

Author

Majhi, S. ; Atherton, Derek P.

Author_Institution

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

fYear

1999

fDate

Aug. 31 1999-Sept. 3 1999

Firstpage

2299

Lastpage

2304

Abstract

A set of general expressions are derived from a single symmetrical relay feedback test for on-line 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 approach can also be used to identify transfer functions of integrating processes. Examples are given to illustrate the value of the proposed general identification method.

Keywords

delays; feedback; identification; limit cycles; transfer functions; FOPDT transfer function models; SOPDT transfer function models; first order plus time delay transfer function models; limit cycle; novel identification method; on-line process identification; second order plus time delay transfer function models; single symmetrical relay feedback test; time delay processes; Delay effects; Gold; Limit-cycles; Mathematical model; Process control; Relays; Transfer functions; damping; integrating; relay feedback identification; stable process model; unstable process model;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (ECC), 1999 European

Conference_Location

Karlsruhe

Print_ISBN

978-3-9524173-5-5

Type

conf

Filename

7099664