Documents disponibles écrits par cet auteur

Observer−Controller Design for a Class of Stable/Unstable Inverse Response Processes / Carles Pedret in Industrial & engineering chemistry research, Vol. 48 N° 24 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 24 (Décembre 2009) . - pp. 10986–10993 Titre : Observer−Controller Design for a Class of Stable/Unstable Inverse Response Processes Type de document : texte imprimé Auteurs : Carles Pedret, Auteur ; Salva Alcántara, Auteur ; Ramon Vilanova, Auteur Année de publication : 2010 Article en page(s) : pp. 10986–10993 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Observer−Controller--Design--Class--Stable--Unstable--Inverse--Response--Processes Résumé : This paper proposes the use of a two-degree-of-freedom configuration aimed at the control of inverse response processes. An observer−controller scheme based on coprime factorization results in a Smith-type predictor well suited for both stable and unstable inverse response processes. The design procedure is carried in two steps. First, the controller is designed providing an adjustable parameter to cope with the reference input tracking. Second, the observer blocks are selected for closed-loop properties, offering another tuning parameter to compromise between robust stability and disturbance rejection performance. As a result, the nominal set point response is decoupled from the disturbance response. To show the applicability of the proposed control configuration, its performance is compared by simulation with different approaches. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9002377 [article] Observer−Controller Design for a Class of Stable/Unstable Inverse Response Processes [texte imprimé] / Carles Pedret, Auteur ; Salva Alcántara, Auteur ; Ramon Vilanova, Auteur . - 2010 . - pp. 10986–10993. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 24 (Décembre 2009) . - pp. 10986–10993 Mots-clés : Observer−Controller--Design--Class--Stable--Unstable--Inverse--Response--Processes Résumé : This paper proposes the use of a two-degree-of-freedom configuration aimed at the control of inverse response processes. An observer−controller scheme based on coprime factorization results in a Smith-type predictor well suited for both stable and unstable inverse response processes. The design procedure is carried in two steps. First, the controller is designed providing an adjustable parameter to cope with the reference input tracking. Second, the observer blocks are selected for closed-loop properties, offering another tuning parameter to compromise between robust stability and disturbance rejection performance. As a result, the nominal set point response is decoupled from the disturbance response. To show the applicability of the proposed control configuration, its performance is compared by simulation with different approaches. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9002377

Observer-controller design for a class of stable/unstable inverse pesponse processes / Carles Pedret in Industrial & engineering chemistry research, Vol. 48 N° 24 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 24 (Décembre 2009) . - pp. 10986–10993 Titre : Observer-controller design for a class of stable/unstable inverse pesponse processes Type de document : texte imprimé Auteurs : Carles Pedret, Auteur ; Salva Alcántara, Auteur ; Ramon Vilanova, Auteur Année de publication : 2010 Article en page(s) : pp. 10986–10993 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Two-degree-of-freedom  configuration  Smith-type  predictor Résumé : This paper proposes the use of a two-degree-of-freedom configuration aimed at the control of inverse response processes. An observer−controller scheme based on coprime factorization results in a Smith-type predictor well suited for both stable and unstable inverse response processes. The design procedure is carried in two steps. First, the controller is designed providing an adjustable parameter to cope with the reference input tracking. Second, the observer blocks are selected for closed-loop properties, offering another tuning parameter to compromise between robust stability and disturbance rejection performance. As a result, the nominal set point response is decoupled from the disturbance response. To show the applicability of the proposed control configuration, its performance is compared by simulation with different approaches. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9002377 [article] Observer-controller design for a class of stable/unstable inverse pesponse processes [texte imprimé] / Carles Pedret, Auteur ; Salva Alcántara, Auteur ; Ramon Vilanova, Auteur . - 2010 . - pp. 10986–10993. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 24 (Décembre 2009) . - pp. 10986–10993 Mots-clés : Two-degree-of-freedom  configuration  Smith-type  predictor Résumé : This paper proposes the use of a two-degree-of-freedom configuration aimed at the control of inverse response processes. An observer−controller scheme based on coprime factorization results in a Smith-type predictor well suited for both stable and unstable inverse response processes. The design procedure is carried in two steps. First, the controller is designed providing an adjustable parameter to cope with the reference input tracking. Second, the observer blocks are selected for closed-loop properties, offering another tuning parameter to compromise between robust stability and disturbance rejection performance. As a result, the nominal set point response is decoupled from the disturbance response. To show the applicability of the proposed control configuration, its performance is compared by simulation with different approaches. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9002377

Robust tuning and performance analysis of 2DoF PI controllers for integrating controlled processes / Victor M. Alfaro in Industrial & engineering chemistry research, Vol. 51 N° 40 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 40 (Octobre 2012) . - pp. 13182–13194 Titre : Robust tuning and performance analysis of 2DoF PI controllers for integrating controlled processes Type de document : texte imprimé Auteurs : Victor M. Alfaro, Auteur ; Ramon Vilanova, Auteur Année de publication : 2012 Article en page(s) : pp. 13182–13194 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Robust  tuning  method Résumé : The aim of this paper is to present a robust tuning method and a closed-loop performance analysis of two-degree-of-freedom proportional integral controllers for integrating controlled processes. A closed-loop model reference optimization method has been followed with nonoscillatory and under damped response targets. It has been found that nonoscillatory response targets produce smoother controller outputs and that the regulatory and servo-control performance (integrated absolute error and setting time) may be improved if lightly-under-damped responses are allowed. The proposed tuning method allows the designer to deal with the performance/robustness trade-off of the resulting closed-loop control system by specifying the desired robustness level through selecting a maximum sensitivity in the range from 1.4 to 2.0. Controller tuning equations that guarantee the design robustness level are provided for integrating second-order plus dead-time models with normalized dead-times in the range from 0.1 to 2.0, and integrating plus dead-time models. The robustness of the control system is analyzed. Comparative examples show the effectiveness of the proposed tuning method. The exact achievement of the control system robustness target for all the integrated controlled processes models considered is the distinctive characteristic of the proposed model reference robust tuning method. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300605w [article] Robust tuning and performance analysis of 2DoF PI controllers for integrating controlled processes [texte imprimé] / Victor M. Alfaro, Auteur ; Ramon Vilanova, Auteur . - 2012 . - pp. 13182–13194. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 40 (Octobre 2012) . - pp. 13182–13194 Mots-clés : Robust  tuning  method Résumé : The aim of this paper is to present a robust tuning method and a closed-loop performance analysis of two-degree-of-freedom proportional integral controllers for integrating controlled processes. A closed-loop model reference optimization method has been followed with nonoscillatory and under damped response targets. It has been found that nonoscillatory response targets produce smoother controller outputs and that the regulatory and servo-control performance (integrated absolute error and setting time) may be improved if lightly-under-damped responses are allowed. The proposed tuning method allows the designer to deal with the performance/robustness trade-off of the resulting closed-loop control system by specifying the desired robustness level through selecting a maximum sensitivity in the range from 1.4 to 2.0. Controller tuning equations that guarantee the design robustness level are provided for integrating second-order plus dead-time models with normalized dead-times in the range from 0.1 to 2.0, and integrating plus dead-time models. The robustness of the control system is analyzed. Comparative examples show the effectiveness of the proposed tuning method. The exact achievement of the control system robustness target for all the integrated controlled processes models considered is the distinctive characteristic of the proposed model reference robust tuning method. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300605w