Generalized internal model control for balancing input / output disturbance response / S. Alcantara in Industrial & engineering chemistry research, Vol. 50 N° 19 (Octobre 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 11170-11180 Titre : Generalized internal model control for balancing input / output disturbance response Type de document : texte imprimé Auteurs : S. Alcantara, Auteur ; C. Pedret, Auteur ; R. Vilanova, Auteur Année de publication : 2011 Article en page(s) : pp. 11170-11180 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Internal model control Résumé : Based on internal model control (IMC), we present a design method to take into account both input and output disturbances. The proposed design provides generalized IMC filters that can be used to obtain good results in terms of output sensitivity (favoring output disturbances), or in terms of input sensitivity (therefore placing the emphasis on load disturbances). If both input and output disturbances are expected, the design offers the possibility of obtaining a balance that improves the overall disturbance rejection response. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24573315 [article] Generalized internal model control for balancing input / output disturbance response [texte imprimé] / S. Alcantara, Auteur ; C. Pedret, Auteur ; R. Vilanova, Auteur . - 2011 . - pp. 11170-11180. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 11170-11180 Mots-clés : Internal model control Résumé : Based on internal model control (IMC), we present a design method to take into account both input and output disturbances. The proposed design provides generalized IMC filters that can be used to obtain good results in terms of output sensitivity (favoring output disturbances), or in terms of input sensitivity (therefore placing the emphasis on load disturbances). If both input and output disturbances are expected, the design offers the possibility of obtaining a balance that improves the overall disturbance rejection response. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24573315

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Maximum Sensitivity Based Robust Tuning for Two-Degree-of-Freedom Proportional−Integral Controllers / V. M. Alfaro in Industrial & engineering chemistry research, Vol. 49 N° 11 (Juin 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 11 (Juin 2010) . - pp. 5415–5423 Titre : Maximum Sensitivity Based Robust Tuning for Two-Degree-of-Freedom Proportional−Integral Controllers Type de document : texte imprimé Auteurs : V. M. Alfaro, Auteur ; R. Vilanova, Auteur ; O. Arrieta, Auteur Année de publication : 2010 Article en page(s) : pp. 5415–5423 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Robust Tuning Integral Controllers Résumé : A tuning method for two-degree-of-freedom (2-DoF) proportional−integral (PI) controllers for first-order-plus-dead-time (FOPDT) models is presented. It allows the designer to deal with the closed-loop control system performance−robustness trade-off specifying the lowest robustness level allowed by selecting a maximum sensitivity in the 1.4−2.0 range. In addition, a smooth performance is obtained by forcing the regulatory and servo-control closed-loop transfer functions to perform as close as possible to a target nonoscillatory dynamics. Controller tuning rules are provided for FOPDT models with normalized dead-times from 0.1 to 2.0. Comparative examples show the effectiveness of the proposed tuning method. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901617y [article] Maximum Sensitivity Based Robust Tuning for Two-Degree-of-Freedom Proportional−Integral Controllers [texte imprimé] / V. M. Alfaro, Auteur ; R. Vilanova, Auteur ; O. Arrieta, Auteur . - 2010 . - pp. 5415–5423. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 11 (Juin 2010) . - pp. 5415–5423 Mots-clés : Robust Tuning Integral Controllers Résumé : A tuning method for two-degree-of-freedom (2-DoF) proportional−integral (PI) controllers for first-order-plus-dead-time (FOPDT) models is presented. It allows the designer to deal with the closed-loop control system performance−robustness trade-off specifying the lowest robustness level allowed by selecting a maximum sensitivity in the 1.4−2.0 range. In addition, a smooth performance is obtained by forcing the regulatory and servo-control closed-loop transfer functions to perform as close as possible to a target nonoscillatory dynamics. Controller tuning rules are provided for FOPDT models with normalized dead-times from 0.1 to 2.0. Comparative examples show the effectiveness of the proposed tuning method. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901617y

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Proportional - integral-Derivative tuning for servo/regulation control operation for unstable and integrating processes / O. Arrieta in Industrial & engineering chemistry research, Vol. 50 N° 6 (Mars 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 6 (Mars 2011) . - pp. 3327–3334 Titre : Proportional - integral-Derivative tuning for servo/regulation control operation for unstable and integrating processes Type de document : texte imprimé Auteurs : O. Arrieta, Auteur ; R. Vilanova, Auteur ; A. Visioli, Auteur Année de publication : 2011 Article en page(s) : pp. 3327–3334 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Servo Integrating processes Résumé : The control of stable processes using PI/PID controllers is by now a well established and understood problem (even if new methods and approaches are continuously appearing). However, when the process has integrating or unstable characteristics the problem becomes much more difficult to manage. Several proposals have appeared in the literature presenting different approaches to tackle the problem. The procedures that have been proposed heavily concentrate on tunings for servo or regulation operation. A common drawback of such approaches is the high loss of performance when the other operation mode is used. In this paper, an approach for providing a unique tuning is presented. It combines tunings for both operation modes in such a way that the performance degradation is traded-off. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101012z [article] Proportional - integral-Derivative tuning for servo/regulation control operation for unstable and integrating processes [texte imprimé] / O. Arrieta, Auteur ; R. Vilanova, Auteur ; A. Visioli, Auteur . - 2011 . - pp. 3327–3334. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 6 (Mars 2011) . - pp. 3327–3334 Mots-clés : Servo Integrating processes Résumé : The control of stable processes using PI/PID controllers is by now a well established and understood problem (even if new methods and approaches are continuously appearing). However, when the process has integrating or unstable characteristics the problem becomes much more difficult to manage. Several proposals have appeared in the literature presenting different approaches to tackle the problem. The procedures that have been proposed heavily concentrate on tunings for servo or regulation operation. A common drawback of such approaches is the high loss of performance when the other operation mode is used. In this paper, an approach for providing a unique tuning is presented. It combines tunings for both operation modes in such a way that the performance degradation is traded-off. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101012z

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Simple analytical min−max model matching approach to robust proportional-integrative-derivative tuning with smooth set-point response / S. Alcantara in Industrial & engineering chemistry research, Vol. 49 N° 2 (Janvier 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 690–700 Titre : Simple analytical min−max model matching approach to robust proportional-integrative-derivative tuning with smooth set-point response Type de document : texte imprimé Auteurs : S. Alcantara, Auteur ; C. Pedret, Auteur ; R. Vilanova, Auteur Année de publication : 2010 Article en page(s) : pp 690–700 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : PID controller Simple analytical Integrative Derivative. Résumé : This communication addresses the set-point robust proportional-integrative-derivative (PID) tuning for stable first order plus time delay systems from a general min−max model matching formulation. As opposed to some recent optimization-based numerical procedures, the derivation is carried out analytically, and it is based on a Smith-type inverse response configuration. Within the considered context, several choices result in a standard PID. This work investigates the simplest one, leading to a PID controller solely depending on a single design parameter. This contrasts with other analytical approaches resulting in more involved tuning. Attending to common performance/robustness indicators, the free parameter is finally fixed to provide an automatic tuning solely dependent on the model information. Toward this transition, dimensional analysis proves fruitful and allows us to establish that the proposed tuning rule is very robust for lead-dominant plants in the presence of parametric uncertainty. Lastly, simulation examples show that the suggested compensator yields very good results. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9010194 [article] Simple analytical min−max model matching approach to robust proportional-integrative-derivative tuning with smooth set-point response [texte imprimé] / S. Alcantara, Auteur ; C. Pedret, Auteur ; R. Vilanova, Auteur . - 2010 . - pp 690–700. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 2 (Janvier 2010) . - pp 690–700 Mots-clés : PID controller Simple analytical Integrative Derivative. Résumé : This communication addresses the set-point robust proportional-integrative-derivative (PID) tuning for stable first order plus time delay systems from a general min−max model matching formulation. As opposed to some recent optimization-based numerical procedures, the derivation is carried out analytically, and it is based on a Smith-type inverse response configuration. Within the considered context, several choices result in a standard PID. This work investigates the simplest one, leading to a PID controller solely depending on a single design parameter. This contrasts with other analytical approaches resulting in more involved tuning. Attending to common performance/robustness indicators, the free parameter is finally fixed to provide an automatic tuning solely dependent on the model information. Toward this transition, dimensional analysis proves fruitful and allows us to establish that the proposed tuning rule is very robust for lead-dominant plants in the presence of parametric uncertainty. Lastly, simulation examples show that the suggested compensator yields very good results. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9010194

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