Title :
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
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;
Conference_Titel :
Control Conference (ECC), 2001 European
Conference_Location :
Porto
Print_ISBN :
978-3-9524173-6-2
