On a relay experiment for frequency response estimation

Author

de Arruda, G.H.M. ; Barros, P.R.

Author_Institution

Dept. de Eng. Eletr., Univ. Fed. da Paraiba, Campina Grande, Brazil

fYear

2001

fDate

4-7 Sept. 2001

Firstpage

669

Lastpage

674

Abstract

In this paper, a relay based procedure for estimating a process frequency response at different oscillating points is presented. The feedback structure is derived from a common framework in which a limit cycle is obtained at the frequency where the process transfer function achieves a selected magnitude. The stability of the closed loop during the test is discussed and a simple procedure is proposed for process safe operation, which is suitable for industrial applications. The estimates are improved using discrete Fourier techniques. The overall procedure is illustrated by simulation examples.

Keywords

closed loop systems; feedback; frequency estimation; frequency response; relay control; stability; transfer functions; closed loop stability; discrete Fourier techniques; feedback structure; frequency response estimation; oscillating points; process safe operation; process transfer function; relay based procedure; Estimation; Frequency estimation; Frequency response; Limit-cycles; Relays; Standards; Transfer functions; Frequency domain identification; estimation; identification methods; process control; signal and systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (ECC), 2001 European

Conference_Location

Porto

Print_ISBN

978-3-9524173-6-2

Type

conf

Filename

7075986