Download or read book Techniques de commande pr dictive et floue pour les syst mes lectroniques de puissance written by Abdelouahab Bouafia and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse s'inscrit dans les travaux de recherche menés sur les moyens modernes, à base de l'électronique de puissance, de dépollution harmonique du réseau de distribution de l'énergie électrique. Cette pollution constitue actuellement un problème majeur surtout dans l'industrie. Elle est causée principalement par les charges non linéaires, prélevant sur le réseau des courants non sinusoïdaux. Les convertisseurs statiques, surtout les redresseurs à diodes et à thyristors, sont de nature non linéaire et représentent la principale source d'injection de courants harmoniques. Ils requièrent donc une attention particulière afin de réduire leurs taux d'harmonique en courant. Dans ce contexte, les solutions modernes préventives adoptées, en plus du filtrage actif qui représente une solution curative, consiste à remplacer les redresseurs classiques par de nouvelles structures de convertisseurs AC/DC non polluants, dont le comportement vis-à-vis du réseau est de nature résistive. Ce travail apporte une contribution à la commande du redresseur de tension à MLI à absorption de courant sinusoïdal. En effet, différentes stratégies de commande ont été développées, simulées et validées sur un banc d'essai expérimental dont le but commun est d'obtenir un réglage performant de la tension du bus continu et un prélèvement de courants sinusoïdaux. Ces stratégies sont basées soit sur le contrôle direct des courants absorbés soit sur le contrôle direct des puissances instantanées (DPC). De plus, elles sont combinées avec des commandes dites avancées, comme les approches floue et prédictive appliquées aux deux techniques de contrôle énoncées précédemment. La simulation de ces méthodes a été mise en oeuvre à l'aide du logiciel Matlab/SimulinkTM et l'implantation en temps réel a été élaborée grâce à une carte contrôleur du système dSPACE 1104.

Download or read book Commande pr dictive des syst mes hybrides et application la commande de syst mes en lectronique de puissance written by Cristina Vlad and published by . This book was released on 2013 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Actuellement la nécessité des systèmes d'alimentation d'énergie, capables d'assurer un fonctionnement stable dans des domaines de fonctionnement assez larges avec des bonnes performances dynamiques (rapidité du système, variations limitées de la tension de sortie en réponse aux perturbations de charge ou de tension d'alimentation), devient de plus en plus importante. De ce fait, cette thèse est orientée sur la commande des convertisseurs de puissance DC-DC représentés par des modèles hybrides.En tenant compte de la structure variable de ces systèmes à commutation, un modèle hybride permet de décrire plus précisément le comportement dynamique d'un convertisseur dans son domaine de fonctionnement. Dans cette optique, l'approximation PWA est utilisée afin de modéliser les convertisseurs DC-DC. A partir des modèles hybrides développés, on s'est intéressé à la stabilisation des convertisseurs au moyen des correcteurs à gains commutés élaborés sur la base de fonctions de Lyapunov PWQ, et à l'implantation d'une commande prédictive explicite, en considérant des contraintes sur l'entrée de commande. La méthode de modélisation et les stratégies de commande proposées ont été appliquées sur deux topologies : un convertisseur buck, afin de mieux maîtriser le réglage des correcteurs et un convertisseur flyback avec filtre d'entrée. Cette dernière topologie nous a permis de répondre aux difficultés du point de vue de la commande (comportement à déphasage non-minimal) rencontrées dans la majorité des convertisseurs DC-DC. Les performances des commandes élaborées ont été validées en simulation sur les topologies considérées et expérimentalement sur une maquette du convertisseur buck.

Download or read book Techniques de Commande Pr dictive Et Floue Du Redresseur Mli written by Abdelouahab Bouafia and published by Omn.Univ.Europ.. This book was released on 2012 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: La pollution harmonique est l'un des ph nom nes entra nant la d gradation de la qualit de l' nergie lectrique. Ses cons quences n fastes sont multiples surtout dans l'industrie. Les redresseurs diodes et thyristors repr sentent la principale source d'injection de courants harmoniques dans le r seau. Ils requi rent alors une attention particuli re afin de r duire leurs taux d'harmonique en courant. Dans ce contexte, les solutions modernes pr ventives adopt es, en plus du filtrage actif qui repr sente une solution curative, consiste remplacer ces redresseurs par de nouvelles structures de convertisseurs AC/DC non polluants. Ce travail apporte une contribution la commande du redresseur de tension MLI. Diff rentes strat gies de commande ont t d velopp es, simul es et valid es exp rimentalement dont le but d'atteindre un pr l vement de courants sinuso daux. Ces strat gies sont bas es soit sur le contr le direct des courants absorb s soit sur le contr le direct des puissances instantan es (DPC). De plus, elles sont combin es avec des commandes avanc es, comme les approches floue et pr dictive appliqu es aux deux techniques de contr le nonc es pr c demment.

Download or read book Neural Networks written by Gérard Dreyfus and published by Springer Science & Business Media. This book was released on 2005-11-25 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neural networks represent a powerful data processing technique that has reached maturity and broad application. When clearly understood and appropriately used, they are a mandatory component in the toolbox of any engineer who wants make the best use of the available data, in order to build models, make predictions, mine data, recognize shapes or signals, etc. Ranging from theoretical foundations to real-life applications, this book is intended to provide engineers and researchers with clear methodologies for taking advantage of neural networks in industrial, financial or banking applications, many instances of which are presented in the book. For the benefit of readers wishing to gain deeper knowledge of the topics, the book features appendices that provide theoretical details for greater insight, and algorithmic details for efficient programming and implementation. The chapters have been written by experts and edited to present a coherent and comprehensive, yet not redundant, practically oriented introduction.

Download or read book La commande pr dictive written by Jacques Richalet and published by Editions Eyrolles. This book was released on 2004 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: De toutes les commandes dites " avancées ", la commande prédictive est la plus utilisée dans l'industrie, aussi bien pour les qualités techniques auxquelles elle doit ses performances que pour sa facilité de mise en œuvre. Son champ d'application s'étend à tous les domaines industriels, notamment aux cas où la régulation PID n'est pas efficace. Cet ouvrage a un objectif essentiellement pratique : aider les ingénieurs et techniciens à mettre en œuvre la commande prédictive. Ni traité d'automatique, ni manuel académique, il présente au lecteur un parcours de difficulté croissante où sont exposées des situations fréquentes dans le contexte industriel : systèmes instables, prise en compte de contraintes, systèmes à réponse inverse, etc. Les équations de régulation les plus courantes sont bien sûr fournies en fin d'ouvrage.

Download or read book Commande pr dictive base d tat adaptive indirecte supervis e par la logique floue written by Jerry Mamboundou and published by . This book was released on 2013 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les travaux présentés dans ce mémoire visent à maintenir les performances d’une boucle de régulation lorsque le système à contrôler est linéaire et à paramètres variant dans le temps. Pour ce faire, nous proposons une commande prédictive discrète, sous contraintes inégalitaires, à base de modèle d’état, adaptative indirecte dont le superviseur fait appel à la logique floue. L’adaptation des paramètres du modèle interne repose sur la méthode des moindres carrés récursifs. L’adaptation des horizons de prédiction, de commande et pondération du signal de contrôle du contrôleur prédictif est réalisée par le superviseur flou sur la base des performances désirées et réelles. L’analyse des boucles de régulation ainsi constituées a permis d’établir les conditions de stabilité entrée bornée - sortie bornée. Enfin le conditionnement du Hessien a été amélioré en introduisant une pondération exponentielle dynamique dans la fonction coût de la commande prédictive. La stratégie proposée a été appliquée en simulation au contrôle de différents systèmes.

Download or read book Quantum Mechanics Volume 3 written by Claude Cohen-Tannoudji and published by John Wiley & Sons. This book was released on 2019-12-16 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.

Download or read book Predicting Structured Data written by Neural Information Processing Systems Foundation and published by MIT Press. This book was released on 2007 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: State-of-the-art algorithms and theory in a novel domain of machine learning, prediction when the output has structure.

Download or read book An Introduction to Computational Learning Theory written by Michael J. Kearns and published by MIT Press. This book was released on 1994-08-15 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emphasizing issues of computational efficiency, Michael Kearns and Umesh Vazirani introduce a number of central topics in computational learning theory for researchers and students in artificial intelligence, neural networks, theoretical computer science, and statistics. Emphasizing issues of computational efficiency, Michael Kearns and Umesh Vazirani introduce a number of central topics in computational learning theory for researchers and students in artificial intelligence, neural networks, theoretical computer science, and statistics. Computational learning theory is a new and rapidly expanding area of research that examines formal models of induction with the goals of discovering the common methods underlying efficient learning algorithms and identifying the computational impediments to learning. Each topic in the book has been chosen to elucidate a general principle, which is explored in a precise formal setting. Intuition has been emphasized in the presentation to make the material accessible to the nontheoretician while still providing precise arguments for the specialist. This balance is the result of new proofs of established theorems, and new presentations of the standard proofs. The topics covered include the motivation, definitions, and fundamental results, both positive and negative, for the widely studied L. G. Valiant model of Probably Approximately Correct Learning; Occam's Razor, which formalizes a relationship between learning and data compression; the Vapnik-Chervonenkis dimension; the equivalence of weak and strong learning; efficient learning in the presence of noise by the method of statistical queries; relationships between learning and cryptography, and the resulting computational limitations on efficient learning; reducibility between learning problems; and algorithms for learning finite automata from active experimentation.

Download or read book The Nature of Statistical Learning Theory written by Vladimir Vapnik and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to discuss the fundamental ideas which lie behind the statistical theory of learning and generalization. It considers learning as a general problem of function estimation based on empirical data. Omitting proofs and technical details, the author concentrates on discussing the main results of learning theory and their connections to fundamental problems in statistics. This second edition contains three new chapters devoted to further development of the learning theory and SVM techniques. Written in a readable and concise style, the book is intended for statisticians, mathematicians, physicists, and computer scientists.

Download or read book Ecritures digitales written by Claire Clivaz and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecritures digitales aims to demonstrate how digital writing, as new technology, contributes to the emergence of a reconfigured relationship between the human body and the machines, and how this transition influences the Jewish-Christian textual corpus referred to as "the Scriptures". Ecritures digitales souhaite démontrer de quelle manière l'écriture digitale, en tant que nouvelle technologie, contribue à l'émergence d'une relation innovante entre le corps humain et les machines, et influence le corpus textuel judéo-chrétien désigné comme «les Ecritures».

Download or read book Smart About Cities written by Netexplo (France) and published by UNESCO Publishing. This book was released on 2020-09-23 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Properties of UO2 written by J. Belle and published by . This book was released on 1957 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Automotive Power Electronics and Motor Drives written by Ali Emadi and published by CRC Press. This book was released on 2017-12-19 with total page 909 pages. Available in PDF, EPUB and Kindle. Book excerpt: Initially, the only electric loads encountered in an automobile were for lighting and the starter motor. Today, demands on performance, safety, emissions, comfort, convenience, entertainment, and communications have seen the working-in of seemingly innumerable advanced electronic devices. Consequently, vehicle electric systems require larger capacities and more complex configurations to deal with these demands. Covering applications in conventional, hybrid-electric, and electric vehicles, the Handbook of Automotive Power Electronics and Motor Drives provides a comprehensive reference for automotive electrical systems. This authoritative handbook features contributions from an outstanding international panel of experts from industry and academia, highlighting existing and emerging technologies. Divided into five parts, the Handbook of Automotive Power Electronics and Motor Drives offers an overview of automotive power systems, discusses semiconductor devices, sensors, and other components, explains different power electronic converters, examines electric machines and associated drives, and details various advanced electrical loads as well as battery technology for automobile applications. As we seek to answer the call for safer, more efficient, and lower-emission vehicles from regulators and consumer insistence on better performance, comfort, and entertainment, the technologies outlined in this book are vital for engineering advanced vehicles that will satisfy these criteria.

Download or read book An Historical Geography of France written by Xavier de Planhol and published by Cambridge University Press. This book was released on 1994-03-17 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this 1994 book, Xavier de Planhol and Paul Claval, two of France's leading scholars in the field, trace the historical geography of their country from its roots in the Roman province of Gaul to the 1990s. They demonstrate how, for centuries, France was little more than an ideological concept, despite its natural physical boundaries and long territorial history. They examine the relatively late development of a more complex territorial geography, involving political, religious, cultural, agricultural and industrial unities and diversities. The conclusion reached is that only in the twentieth century had France achieved a profound territorial unity and only now are the fragmentations of the past being overwritten.

Download or read book Reinforcement Learning second edition written by Richard S. Sutton and published by MIT Press. This book was released on 2018-11-13 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: The significantly expanded and updated new edition of a widely used text on reinforcement learning, one of the most active research areas in artificial intelligence. Reinforcement learning, one of the most active research areas in artificial intelligence, is a computational approach to learning whereby an agent tries to maximize the total amount of reward it receives while interacting with a complex, uncertain environment. In Reinforcement Learning, Richard Sutton and Andrew Barto provide a clear and simple account of the field's key ideas and algorithms. This second edition has been significantly expanded and updated, presenting new topics and updating coverage of other topics. Like the first edition, this second edition focuses on core online learning algorithms, with the more mathematical material set off in shaded boxes. Part I covers as much of reinforcement learning as possible without going beyond the tabular case for which exact solutions can be found. Many algorithms presented in this part are new to the second edition, including UCB, Expected Sarsa, and Double Learning. Part II extends these ideas to function approximation, with new sections on such topics as artificial neural networks and the Fourier basis, and offers expanded treatment of off-policy learning and policy-gradient methods. Part III has new chapters on reinforcement learning's relationships to psychology and neuroscience, as well as an updated case-studies chapter including AlphaGo and AlphaGo Zero, Atari game playing, and IBM Watson's wagering strategy. The final chapter discusses the future societal impacts of reinforcement learning.

Download or read book Electrochemical Components written by Marie-Cécile Pera and published by John Wiley & Sons. This book was released on 2013-07-22 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.