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Author: Khaoula Nagoudi-Layerle
Publisher:
ISBN:
Category :
Languages : fr
Pages : 157
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Book Description
Ce travail concerne l'étude d'une stratégie de commande prédictive dédiée au pilotage des actionneurs (VGT et EGR) de la boucle d'air du moteur Diesel dans le but d'améliorer la consommation et diminuer la pollution. Plusieurs travaux ont déjà été menés sur la régulation des grandeurs physiques de la boucle d'air en utilisant diverses stratégies aussi bien basées sur le modèle du système que sur des règles d'apprentissage. Chaque méthode présente des avantages et des inconvénients qui sont plus ou moins acceptables en fonction des besoins exprimés. Cependant, les travaux appliqués à ce jour en grande série sur véhicule se basent essentiellement sur des commandes utilisant des données mémorisées dans des cartographies. Cette méthode reste limitée si des éléments extérieurs agissent sur la boucle d'air, changeant ainsi les paramètres du système. C'est ainsi que, dans ce travail, un intérêt particulier est porté sur une commande reconfigurable à base de modèle. Nous nous intéressons dans un premier temps aux modèles à valeurs moyennes issus de l'analyse thermodynamique du système pour faire la synthèse de la loi de commande. Nous avons ensuite décliné notre choix de loi de commande prédictive, tout en mettant en avant son caractère adaptatif aux éventuels changements du modèle. Les propriétés du modèle du moteur observées autour d'un point de fonctionnement donné présentent les caractéristiques d'un système à non-minimum de phase. Notre contribution consiste à proposer une méthodologie de découplage qui permet de contourner cette problématique. Nous mettons principalement l'accent sur l'approche matricielle utilisée pour sa résolution. Nous analyserons ensuite l'impact des éventuels changements de modèle sur la commande choisie. Ce qui nous oriente vers une commande prédictive reconfigurable. Cependant, cette loi de commande nécessite une reconstruction d'état. Ce besoin nous a donc amené à élaborer un observateur à correction floue robuste aux bruits de faible amplitude.
Author: Khaoula Nagoudi-Layerle
Publisher:
ISBN:
Category :
Languages : fr
Pages : 157
Get Book Here
Book Description
Ce travail concerne l'étude d'une stratégie de commande prédictive dédiée au pilotage des actionneurs (VGT et EGR) de la boucle d'air du moteur Diesel dans le but d'améliorer la consommation et diminuer la pollution. Plusieurs travaux ont déjà été menés sur la régulation des grandeurs physiques de la boucle d'air en utilisant diverses stratégies aussi bien basées sur le modèle du système que sur des règles d'apprentissage. Chaque méthode présente des avantages et des inconvénients qui sont plus ou moins acceptables en fonction des besoins exprimés. Cependant, les travaux appliqués à ce jour en grande série sur véhicule se basent essentiellement sur des commandes utilisant des données mémorisées dans des cartographies. Cette méthode reste limitée si des éléments extérieurs agissent sur la boucle d'air, changeant ainsi les paramètres du système. C'est ainsi que, dans ce travail, un intérêt particulier est porté sur une commande reconfigurable à base de modèle. Nous nous intéressons dans un premier temps aux modèles à valeurs moyennes issus de l'analyse thermodynamique du système pour faire la synthèse de la loi de commande. Nous avons ensuite décliné notre choix de loi de commande prédictive, tout en mettant en avant son caractère adaptatif aux éventuels changements du modèle. Les propriétés du modèle du moteur observées autour d'un point de fonctionnement donné présentent les caractéristiques d'un système à non-minimum de phase. Notre contribution consiste à proposer une méthodologie de découplage qui permet de contourner cette problématique. Nous mettons principalement l'accent sur l'approche matricielle utilisée pour sa résolution. Nous analyserons ensuite l'impact des éventuels changements de modèle sur la commande choisie. Ce qui nous oriente vers une commande prédictive reconfigurable. Cependant, cette loi de commande nécessite une reconstruction d'état. Ce besoin nous a donc amené à élaborer un observateur à correction floue robuste aux bruits de faible amplitude.
Author: Marie-Cécile Pera
Publisher: John Wiley & Sons
ISBN: 9781848214019
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
This book focuses on the methods of storage commonly used in hybrid systems. After an introductory chapter reviewing the basics of electrochemistry, Chapter 2 is given over to the storage of electricity in the form of hydrogen. Once hydrogen has been made, we have to be able to convert it back into electricity on demand. This can be done with another energy converter: a fuel cell, the subject of Chapter 3. Such a system is unable to deliver significant dynamics in terms of storage and release of electricity and needs to be supplemented with another solution: a detailed study of supercapacitors is provided in Chapter 4.While the storage systems touched upon in the previous three chapters (hydrogen batteries and supercapacitors) both exhibit advantageous characteristics, at present they are still relatively costly. Thus, the days of the electrochemical accumulator by no means appear to be numbered just yet. This will therefore be the topic of Chapter 5. Finally, on the basis of the elements laid down in the previous chapters, Chapter 6 will focus on electrical hybridization of these storage systems, with a view to enhancing the performance (in terms of energy, lifetime, cost, etc.) of the newly formed system. Aimed at an audience of researchers, industrialists, academics, teachers and students, many exercises, along with corrected solutions, are provided throughout the book. Contents 1. Basic Concepts of Electrochemistry used in Electrical Engineering. 2. Water Electrolyzers. 3. Fuel Cells. 4. Electrical Energy Storage by Supercapacitors. 5. Electrochemical Accumulators. 6. Hybrid Electrical System. About the Authors Marie-Cécile Péra is a Full Professor at the University of Franche-Comte in France and Deputy Director of the FEMTO-ST Institute (CNRS). Her research activities include modeling, control and diagnosis of electric power generation systems (fuel cells – PEMFC and SOFC, supercapacities, batteries) for transportation and stationary applications. She has contributed to more than 180 articles in international journals and conferences. Daniel Hissel is Full Professor at the University of Franche-Comte in France and Director of the Fuel Cell Lab Research Federation (CNRS). He also leads a research team devoted to hybrid electrical systems in the FEMTO-ST Institute (CNRS). He has published more than 250 research papers on modeling, control, diagnostics and prognostics of hybrid electrical systems. Hamid Gualous is Full Professor at the University of Caen Lower Normandy in France and director of the LUSAC laboratory. His current research interests include power electronics, electric energy storage, power and energy systems and energy management. Christophe Turpin is Full Researcher at the CNRS (French National Center for Scientific Research). He is responsible for hydrogen activities within the Laboratory LAPLACE, Toulouse, France. His research activities include the characterization and modeling of fuel cells and electrolyzers, the state of health of these components, and their hybridization with other electrochemical components (ultracapacitors, batteries) within optimized energy systems for stationary and aeronautical applications.
Author: Mehmet Sankir
Publisher: John Wiley & Sons
ISBN: 111946062X
Category : Science
Languages : en
Pages : 296
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Book Description
Hydrogen storage is considered a key technology for stationary and portable power generation especially for transportation. This volume covers the novel technologies to efficiently store and distribute hydrogen and discusses the underlying basics as well as the advanced details in hydrogen storage technologies. The book has two major parts: Chemical and electrochemical hydrogen storage and Carbon-based materials for hydrogen storage. The following subjects are detailed in Part I: Multi stage compression system based on metal hydrides Metal-N-H systems and their physico-chemical properties Mg-based nano materials with enhanced sorption kinetics Gaseous and electrochemical hydrogen storage in the Ti-Z-Ni Electrochemical methods for hydrogenation/dehydrogenation of metal hydrides In Part II the following subjects are addressed: Activated carbon for hydrogen storage obtained from agro-industrial waste Hydrogen storage using carbonaceous materials Hydrogen storage performance of composite material consisting of single walled carbon nanotubes and metal oxide nanoparticles Hydrogen storage characteristics of graphene addition of hydrogen storage materials Discussion of the crucial features of hydrogen adsorption of nanotextured carbon-based materials
Author: Ying Liu
Publisher: Springer
ISBN: 9783642096983
Category : Mathematics
Languages : en
Pages : 376
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Book Description
Computational Intelligence (CI) has emerged as a rapidly growing field over the past decade. This volume reports the exploration of CI frontiers with an emphasis on a broad spectrum of real-world applications. Such a collection of chapters has presented the state-of-the-art of CI applications in industry and will be an essential resource for professionals and researchers who wish to learn and spot the opportunities in applying CI techniques to their particular problems.
Author: Viktor Hacker
Publisher: Elsevier
ISBN: 0128115378
Category : Technology & Engineering
Languages : en
Pages : 298
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Book Description
Fuel Cells and Hydrogen: From Fundamentals to Applied Research provides an overview of the basic principles of fuel cell and hydrogen technology, which subsequently allows the reader to delve more deeply into applied research. In addition to covering the basic principles of fuel cells and hydrogen technologies, the book examines the principles and methods to develop and test fuel cells, the evaluation of the performance and lifetime of fuel cells and the concepts of hydrogen production. Fuel Cells and Hydrogen: From Fundamentals to Applied Research acts as an invaluable reference book for fuel cell developers and students, researchers in industry entering the area of fuel cells and lecturers teaching fuel cells and hydrogen technology. - Includes laboratory methods for fuel cell characterization and manufacture - Outlines approaches in modelling components, cells and stacks - Covers practical and theoretical methods for hydrogen production and storage
Author: Danil Prokhorov
Publisher: Springer Science & Business Media
ISBN: 3540792562
Category : Computers
Languages : en
Pages : 374
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Book Description
This edited volume is the first of its kind and provides a representative sample of contemporary computational intelligence (CI) activities in the area of automotive technology. All chapters contain overviews of the state-of-the-art.
Author: Gemma Bel-Enguix
Publisher: Springer
ISBN: 3540782915
Category : Technology & Engineering
Languages : en
Pages : 279
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Book Description
The theory of formal languages is widely recognized as the backbone of theoretical computer science, originating from mathematics and generative linguistics, among others. As a foundational discipline, formal language theory concepts and techniques are present in a variety of theoretical and applied fields of contemporary research which are concerned with symbol manipulation: discrete mathematics, bioinformatics, natural language processing, pattern recognition, text retrieval, learning, cryptography, compression, etc. This volume presents the main results of some recent, quickly developing subfields of formal language theory in an easily accessible way and provides the reader with extensive bibliographical references to go deeper. Open problems are formulated too. The intended audience consists of undergraduates and graduates in computer science or mathematics. Graduates in other disciplines (linguistics, electrical engineering, molecular biology, logic) with some basic level of mathematical maturity may find the volume appealing and useful too. The book represents 'a gate to formal language theory and its applications' and a source of information in computation theory in general. This volume is complementary of the volumes in the Springer series Studies in Fuzziness and Soft Computing, number 148, and Studies in Computational Intelligence, 25.
Author: Michele Weiner-Davis
Publisher: Simon & Schuster Limited
ISBN: 9780743252416
Category : Psychosexual disorders
Languages : en
Pages : 224
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Book Description
'Not tonight, darling, I've got a headache...' An estimated one in three couples suffer from problems associated with one partner having a higher libido than the other. Marriage therapist Michele Weiner Davis has written THE SEX-STARVED MARRIAGE to help couples come to terms with this problem. Weiner Davis shows you how to address pyschological factors like depression, poor body image and communication problems that affect sexual desire. With separate chapters for the spouse that's ready for action and the spouse that's ready for sleep, THE SEX-STARVED MARRIAGE will help you re-spark your passion and stop you fighting about sex. Weiner Davis is renowned for her straight-talking style and here she puts it to great use to let you know you're not alone in having marital sex problems. Bitterness or complacency about ho-hum sex can ruin a marriage, breaking the emotional tie of good sex.
Author:
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 28
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Book Description
Author: Wade H. Shafer
Publisher: Springer
ISBN: 9780306341205
Category : Science
Languages : en
Pages : 320
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Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis· seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) *at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac· tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 20 (thesis year 1975) a total of 10,374 theses titles from 28 Canadian and 239 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. The organization of Volume 20 is identical to that of past years. It consists of theses titles arranged by discipline and by university within each discipline.
