In-mold melt front rate control using a capacitive transducer in injection molding / F. Zhou in INTERNATIONAL POLYMER PROCESSING, Vol. XXIV, N° 3 (07/2009)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXIV, N° 3 (07/2009) . - p. 253-260 Titre : In-mold melt front rate control using a capacitive transducer in injection molding Type de document : texte imprimé Auteurs : F. Zhou, Auteur ; K. Yao, Auteur ; X. Chen, Auteur ; F. Gao, Auteur Année de publication : 2009 Article en page(s) : p. 253-260 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : In the filling phase of injection molding process, melt-front rate plays a particularly important role in determining the part quality. Prior researches recommend a constant melt-front rate for this phase. A measurement device based on a capacitor principle has been developed. It has been shown that this sensor is effective to measure online and continuously melt-front position in mold cavity. Based on this sensor, this work develops and tests closed-loop control system of direct in-mold melt-front rate control. Several advanced control algorithms, Generalized Predictive Control (GPC), Iterative Learning Control (ILC), and Generalized 2D Model Predictive Iterative Learning Control (2D-GPILC), are designed, implemented, and tested with different mold inserts. The results show that 2D-GPILC, a combination scheme of feedback and iterative learning scheme, gives the best control results. DOI : 10.3139/217.2242 En ligne : https://drive.google.com/file/d/15Fk4weAy_1-Z2UABzXCic9FDfYBMx3KB/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5928 [article]

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Injection velocity control using a self-tuning adaptive controller / F. Gao in INTERNATIONAL POLYMER PROCESSING, Vol. XIV, N° 2 (06/1999)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XIV, N° 2 (06/1999) . - p. 196-204 Titre : Injection velocity control using a self-tuning adaptive controller Type de document : texte imprimé Auteurs : F. Gao, Auteur ; Y. Yang, Auteur Année de publication : 1999 Article en page(s) : p. 196-204 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : Molding - The injection velocity dynamics are found to be both time-varying and non-linear and therefore difficult to control using a conventional fixed parameter controller. In this work, an adaptive injection velocity control system with some special features such as anti-estimation windup, adaptive feed-forward, profile shifting and cycle-to-cycle adaptation is designed, implemented, and experimentally tested. The developed system is demonstrated to have excellent control performance with very good robustness for a wide range of operating conditions. DOI : 10.3139/217.1537 En ligne : https://drive.google.com/file/d/1e1YhPVvnU_zQ0pusyz_x2n_ODJwL_jRY/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16104 [article]

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Overall control system for injection molding process / Y. Yang in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 1 (03/2012)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXVII, N° 1 (03/2012) . - p. 40-59 Titre : Overall control system for injection molding process Type de document : texte imprimé Auteurs : Y. Yang, Auteur ; K. Yao, Auteur ; F. Gao, Auteur Année de publication : 2012 Article en page(s) : p. 40-59 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Matières plastiques -- Moulage par injection Tags : 'Moulage  injection'  'Système  contrôle  trois  couches'  'traitement  avancé  paramètres  commande'  'Paramètre  profil'  'Détection  défaut'  'Contrôle  qualité' Index. décimale : 668.9 Polymères Résumé : A multi-layer injection molding machine control system is proposed in this paper. The first layer, an advanced process parameter control layer, provides accurate and robust control of key process variables. The second layer consists of two modules, a profile setting layer determining the shapes of set-point profiles for the key process variables, to achieve an evenly distributed part quality along the flow directions; and a process fault detection and diagnoses system monitoring the operation of injection molding process. The third layer, a quality control layer, consists of a quantitative quality prediction model and a quality controller. This final layer provides a mechanism for closed-loop control of certain part quality. The related work that has been conducted on these three layers is discussed extensively in this paper, and the future work is introduced as well. Note de contenu : - EXPERIMENTAL SETUP : Advanced process control system - Key parameters control performance - KEY PARAMETERS FROFILE SETTING SYSTEM : Profile setting of injection velocity - Profile setting of packing pressure - PROCESS MONITORING SYSTEM : PCA and PLS anlaysis - Stage-based statistical monitoring of injection molding process (Lu et al. 2004, 2004, 2005) - CLOSED-LOOP QUALITY CONTROL SYSTEM : Weight prediction using PCR model - Overall weight control scheme - Closed-loop weight control results DOI : 10.3139/217.2501 En ligne : https://drive.google.com/file/d/1-jwiFufN82c9Dvsh4FTccjrvZalmpB8N/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13720 [article]

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