Documents disponibles écrits par cet auteur

Active low-frequency ripple control for clean-energy power-conditioning mechanism / Rong-Jong Wai in IEEE transactions on industrial electronics, Vol. 57 N° 11 (Novembre 2010) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 57 N° 11 (Novembre 2010) . - pp. 3780 - 3792 Titre : Active low-frequency ripple control for clean-energy power-conditioning mechanism Type de document : texte imprimé Auteurs : Rong-Jong Wai, Auteur ; Chun-Yu, Lin, Auteur Année de publication : 2011 Article en page(s) : pp. 3780 - 3792 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Adaptive  linear  (ADLINE)  neural  network  Clean  energy  Low-frequency  ripple  control  Neural  filter  Power  condition  Total  sliding-mode  control  (TSMC) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper focuses on the design of an active low-frequency ripple control for a clean-energy power-conditioning mechanism with an aim to protect clean-energy sources (e.g., solar photovoltaics, fuel cells, etc.) from the severe damage of current-ripple propagation to expand their life span. First, a simplified circuit for representing the current-ripple phenomenon inside a general power conditioner including a dc/dc converter and a dc/ac inverter is derived, and the dynamic model of the active low-frequency ripple-control circuit is analyzed. Moreover, an adaptive linear neural network is taken as a neural filter to generate the compensation current command, and a total sliding-mode controller is designed to manipulate the ripple-control circuit for injecting a suitable compensation current into the high-voltage bus of the conditioner. In addition, the effectiveness of the proposed active low-frequency ripple-control scheme is verified by numerical simulations and experimental results. Its superiority is indicated in comparison with a conventional high-pass filter and a proportional-integral controller. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5409662 [article] Active low-frequency ripple control for clean-energy power-conditioning mechanism [texte imprimé] / Rong-Jong Wai, Auteur ; Chun-Yu, Lin, Auteur . - 2011 . - pp. 3780 - 3792. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 11 (Novembre 2010) . - pp. 3780 - 3792 Mots-clés : Adaptive  linear  (ADLINE)  neural  network  Clean  energy  Low-frequency  ripple  control  Neural  filter  Power  condition  Total  sliding-mode  control  (TSMC) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper focuses on the design of an active low-frequency ripple control for a clean-energy power-conditioning mechanism with an aim to protect clean-energy sources (e.g., solar photovoltaics, fuel cells, etc.) from the severe damage of current-ripple propagation to expand their life span. First, a simplified circuit for representing the current-ripple phenomenon inside a general power conditioner including a dc/dc converter and a dc/ac inverter is derived, and the dynamic model of the active low-frequency ripple-control circuit is analyzed. Moreover, an adaptive linear neural network is taken as a neural filter to generate the compensation current command, and a total sliding-mode controller is designed to manipulate the ripple-control circuit for injecting a suitable compensation current into the high-voltage bus of the conditioner. In addition, the effectiveness of the proposed active low-frequency ripple-control scheme is verified by numerical simulations and experimental results. Its superiority is indicated in comparison with a conventional high-pass filter and a proportional-integral controller. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5409662

Seismic resistance capacity of high-rise buildings subjected to long-period ground motions / Chun-Yu, Lin in Journal of structural engineering, Vol. 136 N° 6 (Juin 2010) 

Public ISBD [article]  in Journal of structural engineering > Vol. 136 N° 6 (Juin 2010) . - pp. 637-644 Titre : Seismic resistance capacity of high-rise buildings subjected to long-period ground motions : E-defense shaking table test Type de document : texte imprimé Auteurs : Chun-Yu, Lin, Auteur ; Nagae, Takuya, Auteur ; Toko Hitaka, Auteur Année de publication : 2011 Article en page(s) : pp. 637-644 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : High-rise  building  Long-period  ground  motion  Shaking  table  test  Seismic  performance  Beam-to-column  connections Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : A series of large-scale shaking table tests is conducted for a high-rise building structure subjected to long-period ground motions. A test method is developed to preserve the original dimensions of structural members of a prototype building that has 21 stories with a total height of 80 m. The test specimen consists of a four-story, two-span by one-bay steel moment frame and three substitute layers placed on top of the moment frame. The substitute layers, which consist of concrete slabs and rubber bearings, are arranged to represent the upper stories of the prototype. From preliminary vibration tests, equivalence between the test specimen and the prototype is verified in terms of the lower mode natural periods and corresponding mode shapes. The test specimen when subjected to long-period ground motions exhibits cumulative ductilities more than four times those expected in Japanese seismic design, while the maximum story drifts remain nearly the same as those considered in the design. A number of cyclic inelastic deformations caused fractures at the bottom flanges of beam ends. According to these observations, the combination of large cumulative ductility demand, the weld quality of the field weld connections, and the promotion of strain concentrations at the toe of the bottom flange weld access hole by the presence of floor slabs caused the fractures and resultant smaller cumulative ductility relative to that observed in the bare beam tests. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i6/p637_s1?isAuthorized=no [article] Seismic resistance capacity of high-rise buildings subjected to long-period ground motions : E-defense shaking table test [texte imprimé] / Chun-Yu, Lin, Auteur ; Nagae, Takuya, Auteur ; Toko Hitaka, Auteur . - 2011 . - pp. 637-644. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 136 N° 6 (Juin 2010) . - pp. 637-644 Mots-clés : High-rise  building  Long-period  ground  motion  Shaking  table  test  Seismic  performance  Beam-to-column  connections Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : A series of large-scale shaking table tests is conducted for a high-rise building structure subjected to long-period ground motions. A test method is developed to preserve the original dimensions of structural members of a prototype building that has 21 stories with a total height of 80 m. The test specimen consists of a four-story, two-span by one-bay steel moment frame and three substitute layers placed on top of the moment frame. The substitute layers, which consist of concrete slabs and rubber bearings, are arranged to represent the upper stories of the prototype. From preliminary vibration tests, equivalence between the test specimen and the prototype is verified in terms of the lower mode natural periods and corresponding mode shapes. The test specimen when subjected to long-period ground motions exhibits cumulative ductilities more than four times those expected in Japanese seismic design, while the maximum story drifts remain nearly the same as those considered in the design. A number of cyclic inelastic deformations caused fractures at the bottom flanges of beam ends. According to these observations, the combination of large cumulative ductility demand, the weld quality of the field weld connections, and the promotion of strain concentrations at the toe of the bottom flange weld access hole by the presence of floor slabs caused the fractures and resultant smaller cumulative ductility relative to that observed in the bare beam tests. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i6/p637_s1?isAuthorized=no