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Relay feedback identification for processes under drift and noisy environments

2010; Wiley; Volume: 57; Issue: 7 Linguagem: Inglês

10.1002/aic.12394

1547-5905

Jietae Lee, Jinsu Kim, Jeonguk Byeon, Su Whan Sung, Thomas F. Edgar,

Advanced Control Systems Optimization

AIChE JournalVolume 57, Issue 7 p. 1809-1816 Process Systems Engineering Relay feedback identification for processes under drift and noisy environments Jietae Lee, Corresponding Author Jietae Lee jtlee@knu.ac.kr Dept. of Chemical Engineering, Kyungpook National University, Taegu 702-701, KoreaDept. of Chemical Engineering, Kyungpook National University, Taegu 702-701, KoreaSearch for more papers by this authorJin-Su Kim, Jin-Su Kim Dept. of Chemical Engineering, Kyungpook National University, Taegu 702-701, KoreaSearch for more papers by this authorJeonguk Byeon, Jeonguk Byeon Dept. of Chemical Engineering, Kyungpook National University, Taegu 702-701, KoreaSearch for more papers by this authorSu Whan Sung, Su Whan Sung Dept. of Chemical Engineering, Kyungpook National University, Taegu 702-701, KoreaSearch for more papers by this authorThomas F. Edgar, Thomas F. Edgar Dept. of Chemical Engineering, University of Texas at Austin, Austin, TX 78712Search for more papers by this author Jietae Lee, Corresponding Author Jietae Lee jtlee@knu.ac.kr Dept. of Chemical Engineering, Kyungpook National University, Taegu 702-701, KoreaDept. of Chemical Engineering, Kyungpook National University, Taegu 702-701, KoreaSearch for more papers by this authorJin-Su Kim, Jin-Su Kim Dept. of Chemical Engineering, Kyungpook National University, Taegu 702-701, KoreaSearch for more papers by this authorJeonguk Byeon, Jeonguk Byeon Dept. of Chemical Engineering, Kyungpook National University, Taegu 702-701, KoreaSearch for more papers by this authorSu Whan Sung, Su Whan Sung Dept. of Chemical Engineering, Kyungpook National University, Taegu 702-701, KoreaSearch for more papers by this authorThomas F. Edgar, Thomas F. Edgar Dept. of Chemical Engineering, University of Texas at Austin, Austin, TX 78712Search for more papers by this author First published: 16 August 2010 https://doi.org/10.1002/aic.12394Citations: 10Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Relay feedback identification methods are widely used to find the process ultimate information and tune proportional-integral-derivative controllers. The conventional relay feedback method has several disadvantages, which include poor estimates of the process ultimate information for low-order processes, chattering of relay for noisy environments, and asymmetric relay responses for constant biases or slow drifts in the process outputs. Methods to mitigate each of the above disadvantages are available. However, a systematic method to treat all of them has not been studied yet. Here, simple relay feedback methods that resolve these problems by introducing band-pass filters in the feedback loop are proposed. The high-pass filter part in band-pass filter removes a constant bias or low frequency drift, and the low-pass filter part removes high frequency noise and high-order harmonic terms in the relay feedback oscillation, resulting better estimates of the process ultimate information. Because filters used for the proposed methods are able to reject constant biases, the process steady state gains can be estimated without disturbing the relay feedback oscillations and first order plus time delay (FOPTD) models can be obtained by combining the process steady state gains with the relay oscillation information. © 2010 American Institute of Chemical Engineers AIChE J, 2011 Citing Literature Volume57, Issue7July 2011Pages 1809-1816 RelatedInformation