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Closed-loop process identification under PI control: a time domain approach

journal contribution
posted on 2023-05-17, 01:28 authored by Silva, R, Sbarbaro, D, Bernardo Leon de la Barra
Closed-loop identification plays an important role in improving existing underperforming closed-loop controllers, also enabling the identification of systems that, either by technical or economical reasons, cannot operate in open-loop fashion. A simple and noise-immune closed-loop identification approach based on step responses is presented. This method is entirely conceived in the time domain, and it is flexible enough to identify a set of simple low-order models that can be obtained from either reference or disturbance closed-loop step responses. This latter feature makes the proposed approach an ideal option as a building block of an adaptive controller. A comparative study considering other closed-loop identification methods available in the literature highlights the effectiveness of the new approach. Finally, a set of experimental examples demonstrates its ability to deal with real industrial processes.

History

Publication title

Industrial and Engineering Chemistry Research

Volume

45

Issue

13

Pagination

4671-4678

ISSN

0888-5885

Department/School

School of Engineering

Publisher

Amer Chemical Soc

Place of publication

1155 16Th St, Nw, Washington, USA, Dc, 20036

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in engineering

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