A new unified approach to valve stiction quantification and compensation / Lee Zhi Xiang Ivan in Industrial & engineering chemistry research, Vol. 48 N° 7 (Avril 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3474–3483 Titre : A new unified approach to valve stiction quantification and compensation Type de document : texte imprimé Auteurs : Lee Zhi Xiang Ivan, Auteur ; S. Lakshminarayanan, Auteur Année de publication : 2009 Article en page(s) : pp. 3474–3483 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Valve stiction Control loops Hammerstein identification approach Résumé : Satisfactory control loop performance has always been a vital objective in process industries for economic reasons. However, unsatisfactory performance may prevail, of which valve stiction is a common culprit. In this work, a new unified approach is introduced to quantify valve stiction in control loops and then compensate for it. The newly proposed stiction quantification method uses a one-parameter stiction model and is based on a modified Hammerstein identification approach. In conjunction with the stiction quantification algorithm, a novel compensation technique that adds a constant amplitude signal to the valve input signal is presented. The effectiveness of the proposed scheme is demonstrated using simulation examples. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800961f [article] A new unified approach to valve stiction quantification and compensation [texte imprimé] / Lee Zhi Xiang Ivan, Auteur ; S. Lakshminarayanan, Auteur . - 2009 . - pp. 3474–3483. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3474–3483 Mots-clés : Valve stiction Control loops Hammerstein identification approach Résumé : Satisfactory control loop performance has always been a vital objective in process industries for economic reasons. However, unsatisfactory performance may prevail, of which valve stiction is a common culprit. In this work, a new unified approach is introduced to quantify valve stiction in control loops and then compensate for it. The newly proposed stiction quantification method uses a one-parameter stiction model and is based on a modified Hammerstein identification approach. In conjunction with the stiction quantification algorithm, a novel compensation technique that adds a constant amplitude signal to the valve input signal is presented. The effectiveness of the proposed scheme is demonstrated using simulation examples. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800961f

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