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- Publisher
- Springer Journals
- Copyright
- Copyright © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022
- ISSN
- 2195-268X
- eISSN
- 2195-2698
- DOI
- 10.1007/s40435-022-00965-x
- Publisher site
- See Article on Publisher Site
Abstract
A real-time identification scheme based on relay autotuning and state-space analysis for the estimation of dynamics of time-delayed plants is proposed in this article. A set of mathematical expressions for parameter estimation of the process dynamics in the form of first- and second-order plus time delay transfer functions is derived. A relay with a hysteresis band is utilized for the mitigation of undesired noise content present at the process output in the noisy environment. The proposed method is studied on well-known process dynamics in comparison with the models available in the literature. After that, the relay autotuning tests (with and without hysteresis band) are conducted for the identification of dynamics of a real-time level control unit on a distributed control system platform with industry-standard field instruments. Finally, the experimental results from the relay tests are appended to show the practical applicability of the proposed modeling scheme and verify the dynamics in comparison with the actual data.
Journal
International Journal of Dynamics and Control – Springer Journals
Published: Feb 1, 2023
Keywords: Process dynamics; Estimation and modeling; State-space method; Relay autotuning