Documents disponibles écrits par cet auteur

Analysis of insertion loss and impedance compatibility of hybrid EMI filter based on equivalent circuit model / Chen, Wenjie in IEEE transactions on industrial electronics, Vol. 54 N°4 (Août 2007) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 54 N°4 (Août 2007) . - 2057-2064 p. Titre : Analysis of insertion loss and impedance compatibility of hybrid EMI filter based on equivalent circuit model Titre original : Analyse de la perte d'insertion et compatibilité d'impédance du filtre d'IEM hybride basé sur le modèle de circuit équivalent Type de document : texte imprimé Auteurs : Chen, Wenjie, Auteur ; Yang, Xu, Auteur ; Wang, Zhaoan, Auteur Article en page(s) : 2057-2064 p. Note générale : Electronique Langues : Anglais (eng) Mots-clés : Active  filter  Electromagnetic  interference  (EMI)  Hybrid  Model  Filtre  actif  Interférence  électromagnétique  Hybride  Modèle Index. décimale : 621 Ingénierie mécanique en général. Technologie nucléaire. Ingénierie électrique. Machinerie Résumé : The hybrid active electromagnetic interference filter (HAEF) is considered one of the best options for improving power quality for a number of considerations. A systematic classification and identification of HAEF configurations is given, including their insertion losses, impedance compatibilities, potential applications, and comparative features. It is aimed at providing a broad perspective on the status of HAEF technology to researchers and application engineers dealing with EMI issues. The basis of discussion is an equivalent circuit model that includes all possible combinations of active and passive elements and matches these to the desirable attributes. The evaluation indicates those topologies that are known and those topologies that are relatively new. Le filtre actif hybride d'interférence électromagnétique (HAEF) est considéré une des meilleures options pour améliorer la qualité de puissance pour un certain nombre de considérations. Une classification et une identification systématiques des configurations de HAEF est donnée, y compris leurs pertes d'insertion, compatibilités d'impédance, applications potentielles, et dispositifs comparatifs. Elle est visée fournissant une large perspective sur le statut de technologie de HAEF aux chercheurs et aux ingénieurs technico-commercials traitant des questions d'IEM. La base de la discussion est un modèle de circuit équivalent qui inclut toutes les combinaisons possibles des éléments et des matchs actifs et passifs ceux-ci aux attributs souhaitables. L'évaluation indique ces topologies qui sont connues et ces topologies qui sont relativement nouvelles. DEWEY : 621 ISSN : 0278-0046 RAMEAU : Filtres électriques actifs-- Brouillage électromagnétique En ligne : cwj@mail.xjtu.edu.cn [article] Analysis of insertion loss and impedance compatibility of hybrid EMI filter based on equivalent circuit model = Analyse de la perte d'insertion et compatibilité d'impédance du filtre d'IEM hybride basé sur le modèle de circuit équivalent [texte imprimé] / Chen, Wenjie, Auteur ; Yang, Xu, Auteur ; Wang, Zhaoan, Auteur . - 2057-2064 p. Electronique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 54 N°4 (Août 2007) . - 2057-2064 p. Mots-clés : Active  filter  Electromagnetic  interference  (EMI)  Hybrid  Model  Filtre  actif  Interférence  électromagnétique  Hybride  Modèle Index. décimale : 621 Ingénierie mécanique en général. Technologie nucléaire. Ingénierie électrique. Machinerie Résumé : The hybrid active electromagnetic interference filter (HAEF) is considered one of the best options for improving power quality for a number of considerations. A systematic classification and identification of HAEF configurations is given, including their insertion losses, impedance compatibilities, potential applications, and comparative features. It is aimed at providing a broad perspective on the status of HAEF technology to researchers and application engineers dealing with EMI issues. The basis of discussion is an equivalent circuit model that includes all possible combinations of active and passive elements and matches these to the desirable attributes. The evaluation indicates those topologies that are known and those topologies that are relatively new. Le filtre actif hybride d'interférence électromagnétique (HAEF) est considéré une des meilleures options pour améliorer la qualité de puissance pour un certain nombre de considérations. Une classification et une identification systématiques des configurations de HAEF est donnée, y compris leurs pertes d'insertion, compatibilités d'impédance, applications potentielles, et dispositifs comparatifs. Elle est visée fournissant une large perspective sur le statut de technologie de HAEF aux chercheurs et aux ingénieurs technico-commercials traitant des questions d'IEM. La base de la discussion est un modèle de circuit équivalent qui inclut toutes les combinaisons possibles des éléments et des matchs actifs et passifs ceux-ci aux attributs souhaitables. L'évaluation indique ces topologies qui sont connues et ces topologies qui sont relativement nouvelles. DEWEY : 621 ISSN : 0278-0046 RAMEAU : Filtres électriques actifs-- Brouillage électromagnétique En ligne : cwj@mail.xjtu.edu.cn

Coupling dynamic model and control of chatter in cold rolling / Yang, Xu in Transactions of the ASME . Journal of dynamic systems, measurement, and control, Vol. 134 N° 4 (Juillet 2012) 

Public ISBD [article]  in Transactions of the ASME . Journal of dynamic systems, measurement, and control > Vol. 134 N° 4 (Juillet 2012) . - 08 p. Titre : Coupling dynamic model and control of chatter in cold rolling Type de document : texte imprimé Auteurs : Yang, Xu, Auteur ; Chao-nan Tong, Auteur Année de publication : 2012 Article en page(s) : 08 p. Note générale : Dynamic systems Langues : Anglais (eng) Mots-clés : 4-h  mill  Dynamic  model  Rolling  process  model  PID  controller Index. décimale : 629.8 Résumé : The dynamic model of 4-h mill, which couples with the rolling process model, the mill roll stand structure model, and the hydraulic servo system model, is built by analyzing the vibration process of cold rolling. By linearization, the multiple input multiple output linear transfer function matrix model of single stand 4-h cold mill system is obtained. With the consideration of strip quality, the model of strip thickness control system is established in a simplified form. Meanwhile, the robust controller based on quantitative feedback theory is designed for the gauge control model. A comparison with PID controller shows that the controller has better disturbance attenuation performance for parameter uncertainty and external disturbance. DEWEY : 629.8 ISSN : 0022-0434 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JDSMAA000134000004 [...] [article] Coupling dynamic model and control of chatter in cold rolling [texte imprimé] / Yang, Xu, Auteur ; Chao-nan Tong, Auteur . - 2012 . - 08 p. Dynamic systems Langues : Anglais (eng) in Transactions of the ASME . Journal of dynamic systems, measurement, and control > Vol. 134 N° 4 (Juillet 2012) . - 08 p. Mots-clés : 4-h  mill  Dynamic  model  Rolling  process  model  PID  controller Index. décimale : 629.8 Résumé : The dynamic model of 4-h mill, which couples with the rolling process model, the mill roll stand structure model, and the hydraulic servo system model, is built by analyzing the vibration process of cold rolling. By linearization, the multiple input multiple output linear transfer function matrix model of single stand 4-h cold mill system is obtained. With the consideration of strip quality, the model of strip thickness control system is established in a simplified form. Meanwhile, the robust controller based on quantitative feedback theory is designed for the gauge control model. A comparison with PID controller shows that the controller has better disturbance attenuation performance for parameter uncertainty and external disturbance. DEWEY : 629.8 ISSN : 0022-0434 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JDSMAA000134000004 [...]

Frictional loss studies and experimental performance of a new synchronal rotary multiphase pump / Yang, Xu in Transactions of the ASME . Journal of fluids engineering, Vol. 133 N° 4 (Avril 2011) 

Public ISBD [article]  in Transactions of the ASME . Journal of fluids engineering > Vol. 133 N° 4 (Avril 2011) . - 09 p. Titre : Frictional loss studies and experimental performance of a new synchronal rotary multiphase pump Type de document : texte imprimé Auteurs : Yang, Xu, Auteur ; Qu, Zongchang, Auteur ; Wu, Yuyuan, Auteur Année de publication : 2011 Article en page(s) : 09 p. Note générale : Fluids engineering Langues : Anglais (eng) Mots-clés : Blades  Crude  oil  Machine  bearings  Mathematical  analysis  Prototypes  Pumps  Seals  (stoppers)  Shafts  Sliding  friction Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : A new synchronal rotary multiphase pump (SRMP) is presented, which is geometrically simple and easy to manufacture. With the rotary cylinder, the frictional losses between the major components of the SRMP are minimized. Its structural design and working principles are introduced. The mathematic models of the frictional losses at various friction-couplings are formulated. Calculations on the frictional losses and mechanical efficiency are performed for a SRMP prototype, too. Experimental works on the prototype in which crude oil is used as working fluids are conducted to validate the functionality of the SRMP and the established models. The calculated results show that the frictional losses in the SRMP are mainly produced by the friction from bearings and seals. The frictional losses caused by the other part of components occupy less than 13% of the total frictional losses. In addition, the theoretical analyses of the various shaft speeds and basic geometrical parameters reveal that the cylinder rotary inertia exercises a negative effect on the friction at the sliding vane sides. Lower shaft speed and smaller eccentricity-cylinder radius ratio are helpful to reduce this effect. In the experiment, the SRMP is operated at shaft speeds of 400, 600 and 800 rpm respectively. The pressure differences are arranged within 0–2.4MPa. The measured values of the shaft consumption powers are shown to be in good agreement with the calculations. These results confirm that the SRMP is suitable for multiphase transportation and has a higher mechanical efficiency. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JFEGA400013 [...] [article] Frictional loss studies and experimental performance of a new synchronal rotary multiphase pump [texte imprimé] / Yang, Xu, Auteur ; Qu, Zongchang, Auteur ; Wu, Yuyuan, Auteur . - 2011 . - 09 p. Fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 133 N° 4 (Avril 2011) . - 09 p. Mots-clés : Blades  Crude  oil  Machine  bearings  Mathematical  analysis  Prototypes  Pumps  Seals  (stoppers)  Shafts  Sliding  friction Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : A new synchronal rotary multiphase pump (SRMP) is presented, which is geometrically simple and easy to manufacture. With the rotary cylinder, the frictional losses between the major components of the SRMP are minimized. Its structural design and working principles are introduced. The mathematic models of the frictional losses at various friction-couplings are formulated. Calculations on the frictional losses and mechanical efficiency are performed for a SRMP prototype, too. Experimental works on the prototype in which crude oil is used as working fluids are conducted to validate the functionality of the SRMP and the established models. The calculated results show that the frictional losses in the SRMP are mainly produced by the friction from bearings and seals. The frictional losses caused by the other part of components occupy less than 13% of the total frictional losses. In addition, the theoretical analyses of the various shaft speeds and basic geometrical parameters reveal that the cylinder rotary inertia exercises a negative effect on the friction at the sliding vane sides. Lower shaft speed and smaller eccentricity-cylinder radius ratio are helpful to reduce this effect. In the experiment, the SRMP is operated at shaft speeds of 400, 600 and 800 rpm respectively. The pressure differences are arranged within 0–2.4MPa. The measured values of the shaft consumption powers are shown to be in good agreement with the calculations. These results confirm that the SRMP is suitable for multiphase transportation and has a higher mechanical efficiency. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JFEGA400013 [...]

Theoretical study on frictional losses of a novel automotive swing vane compressor / Xu Hu in International journal of refrigeration, Vol. 36 N° 3 (Mai 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 758–767 Titre : Theoretical study on frictional losses of a novel automotive swing vane compressor Titre original : Etude théorique sur les pertes dues au frottement d'un nouveau compresseur à palettes automobile Type de document : texte imprimé Auteurs : Xu Hu, Auteur ; Qu, Zongchang, Auteur ; Yang, Xu, Auteur Année de publication : 2013 Article en page(s) : pp. 758–767 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Loss;  Friction;  Automotive  compressor;  Air  conditioning Résumé : This paper introduces a novel rotary compressor named ‘Swing vane compressor’ (SVC) used for automotive air conditioning systems. By the vane structure which is similar to simple supported beam, SVC can bear higher gas working pressure and rotation speed compared to the sliding vane compressor. The paper introduces the working principle and analyzes frictional model at various contact regions. End-faces frictional losses and vane side frictional loss are the main part frictional losses in SVC. Compared to sliding vane compressor, SVC shows less frictional loss when rotation speed is less than 4000 rpm. Each frictional loss changing with rotation speed also is discussed. SVC provides a selection for automotive air conditioning systems. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712003003 [article] Theoretical study on frictional losses of a novel automotive swing vane compressor = Etude théorique sur les pertes dues au frottement d'un nouveau compresseur à palettes automobile [texte imprimé] / Xu Hu, Auteur ; Qu, Zongchang, Auteur ; Yang, Xu, Auteur . - 2013 . - pp. 758–767. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 758–767 Mots-clés : Loss;  Friction;  Automotive  compressor;  Air  conditioning Résumé : This paper introduces a novel rotary compressor named ‘Swing vane compressor’ (SVC) used for automotive air conditioning systems. By the vane structure which is similar to simple supported beam, SVC can bear higher gas working pressure and rotation speed compared to the sliding vane compressor. The paper introduces the working principle and analyzes frictional model at various contact regions. End-faces frictional losses and vane side frictional loss are the main part frictional losses in SVC. Compared to sliding vane compressor, SVC shows less frictional loss when rotation speed is less than 4000 rpm. Each frictional loss changing with rotation speed also is discussed. SVC provides a selection for automotive air conditioning systems. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712003003