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On-line, auto-tuning control of Electronic Expansion Valves / Alessandro Beghi in International journal of refrigeration, Vol. 34 N° 4 (Juin 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 1151-1161 Titre : On-line, auto-tuning control of Electronic Expansion Valves Titre original : Détendeurs électroniques : régulation autonome en ligne Type de document : texte imprimé Auteurs : Alessandro Beghi, Auteur ; Luca Cecchinato, Auteur ; Mirco Rampazzo, Auteur Année de publication : 2011 Article en page(s) : pp. 1151-1161 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Automatic  control  Display  cabinet  Evaporator  Dry  expansion  Electronic  expansion  valve  Superheat  Transient  state Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In this paper, the results of a research project aimed at deriving simple, high-performance, auto-tuning, robust control algorithms for evaporators controlled by means of EEVs (Electronic Expansion Valves) are reported. Control design is performed by resorting to a detailed virtual prototyping environment described in Beghi and Cecchinato (2009). The proposed control scheme consists of two nested loops. In the inner loop, the plant is connected in feedback to a PID controller. It is assumed that the structure of the process model is given but its parameters are unknown. The outer loop is composed of a parameter estimator and an adaptation algorithm that updates the parameters of the PID controller on the basis of the result of a system identification procedure. Performance of the proposed controller is evaluated in the virtual prototyping environment by means of simulations. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002896 [article] On-line, auto-tuning control of Electronic Expansion Valves = Détendeurs électroniques : régulation autonome en ligne [texte imprimé] / Alessandro Beghi, Auteur ; Luca Cecchinato, Auteur ; Mirco Rampazzo, Auteur . - 2011 . - pp. 1151-1161. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 1151-1161 Mots-clés : Automatic  control  Display  cabinet  Evaporator  Dry  expansion  Electronic  expansion  valve  Superheat  Transient  state Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In this paper, the results of a research project aimed at deriving simple, high-performance, auto-tuning, robust control algorithms for evaporators controlled by means of EEVs (Electronic Expansion Valves) are reported. Control design is performed by resorting to a detailed virtual prototyping environment described in Beghi and Cecchinato (2009). The proposed control scheme consists of two nested loops. In the inner loop, the plant is connected in feedback to a PID controller. It is assumed that the structure of the process model is given but its parameters are unknown. The outer loop is composed of a parameter estimator and an adaptation algorithm that updates the parameters of the PID controller on the basis of the result of a system identification procedure. Performance of the proposed controller is evaluated in the virtual prototyping environment by means of simulations. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002896