Contribution à l'instrumentation de la démarche de conception des machines électriques

Contribution à l'instrumentation de la démarche de conception des machines électriques
Title Contribution à l'instrumentation de la démarche de conception des machines électriques PDF eBook
Author Michel Hecquet
Publisher
Pages
Release 2006
Genre
ISBN

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La conception d'un produit électrotechnique est une étape clé de son cycle de vie dont dépendent nombre de ses propriétés : valeur d'usage, coût, empreinte environnementale, fiabilité, etc.. La démarche de conception traditionnelle, «business as usual », est celle de l'approche progressive constituée d'essais et d'erreurs. L'objectif principal de l'équipe Conception et Optimisation des Machines Electriques (C.O.M.E.), qui reste à l'heure actuelle utopique, est de substituer à ce processus long et coûteux une démarche entièrement virtuelle utilisant uniquement des procédés numériques. Pour l'atteindre, nous nous proposons dans un premier temps de dégager des méthodes de conception s'appuyant sur des outils logiciels adaptés, ce qui peut se résumer par «l'instrumentation de la démarche de conception». Un de nos objectifs au cours de ces 10 dernières années de recherche a été de trouver des solutions de représentations des machines électriques de façon à éviter le coût d'un prototype. L'approche par réseaux de perméances. qui offre un bon compromis entre la précision des résultats et le temps de calcul. a été privilégiée. Ainsi, à chacun des systèmes réels étudiés s'est vu correspondre un équivalent virtuel infiniment plus avantageux. Celui-ci peut être modifié à volonté, au gré de l'expérimentateur. Cette démarche est typiquement appliquée lors d'optimisations pendant lesquelles les caractéristiques des modèles sont modifiées afin d'améliorer certaines performances. En ce qui concerne l'optimisation. la Méthode des Plans d'Expériences a été privilégiée. Dans ces développements, nous nous sommes efforcés d'assurer une bonne adéquation entre le modéle et la méthode d'optimisation choisie. Enfin, la confrontation avec l'expérience menée le plus souvent avec l'appui de nos partenaires industriels a permis de valider nos approches. Les différents exemples traités sont naturellement couplés et répondent à un besoin important en recherche technologique notamment dans le cadre du CNRT (Centre National de Recherche Technlologique) Génie Electrique intitulé 'Réseaux et Machines du Futur'. Le rapport est divisé en trois parties qui décrivent et situent mes travaux. La première partie constitue un résumé détaillé des activités pédagogique, administrative et recherche. La deuxième partie présente mes activités de recherche du prototypage virtuel à l'optimisation par plans d'expériences et est illustrée par des exemples d'applications. Enfin, la dernière partie dresse un bilan ainsi qu'une présentation des perspectives court et long terme.

Gas-cooled Nuclear Reactors

Gas-cooled Nuclear Reactors
Title Gas-cooled Nuclear Reactors PDF eBook
Author France. Commissariat à l'énergie atomique
Publisher
Pages 192
Release 2006
Genre Fuel cycle
ISBN

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A Power Stronger Than Itself

A Power Stronger Than Itself
Title A Power Stronger Than Itself PDF eBook
Author George E. Lewis
Publisher University of Chicago Press
Pages 726
Release 2008-09-15
Genre Social Science
ISBN 0226477037

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Founded in 1965 and still active today, the Association for the Advancement of Creative Musicians (AACM) is an American institution with an international reputation. George E. Lewis, who joined the collective as a teenager in 1971, establishes the full importance and vitality of the AACM with this communal history, written with a symphonic sweep that draws on a cross-generational chorus of voices and a rich collection of rare images. Moving from Chicago to New York to Paris, and from founding member Steve McCall’s kitchen table to Carnegie Hall, A Power Stronger Than Itself uncovers a vibrant, multicultural universe and brings to light a major piece of the history of avant-garde music and art.

From Microphysics to Macrophysics

From Microphysics to Macrophysics
Title From Microphysics to Macrophysics PDF eBook
Author Roger Balian
Publisher Springer Science & Business Media
Pages 626
Release 2007-06-26
Genre Science
ISBN 3540454802

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This popular, often cited text returns in a softcover edition to provide a thorough introduction to statistical physics and thermodynamics, and to exhibit the universal chain of ideas leading from the laws of microphysics to the macroscopic behaviour of matter. A wide range of applications illustrates the concepts, and many exercises reinforce understanding. Volume II applies statistical methods to systems governed by quantum effects, in particular to solid state physics, explaining properties due to the crystal structure or to the lattice excitations or to the electrons. The last chapters are devoted to non-equilibrium processes and to kinetic equations, with many applications included.

Biomimicry

Biomimicry
Title Biomimicry PDF eBook
Author Janine M. Benyus
Publisher Harper Collins
Pages 324
Release 2009-08-11
Genre Science
ISBN 0061958921

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Repackaged with a new afterword, this "valuable and entertaining" (New York Times Book Review) book explores how scientists are adapting nature's best ideas to solve tough 21st century problems. Biomimicry is rapidly transforming life on earth. Biomimics study nature's most successful ideas over the past 3.5 million years, and adapt them for human use. The results are revolutionizing how materials are invented and how we compute, heal ourselves, repair the environment, and feed the world. Janine Benyus takes readers into the lab and in the field with maverick thinkers as they: discover miracle drugs by watching what chimps eat when they're sick; learn how to create by watching spiders weave fibers; harness energy by examining how a leaf converts sunlight into fuel in trillionths of a second; and many more examples. Composed of stories of vision and invention, personalities and pipe dreams, Biomimicry is must reading for anyone interested in the shape of our future.

Four Laws That Drive the Universe

Four Laws That Drive the Universe
Title Four Laws That Drive the Universe PDF eBook
Author Peter Atkins
Publisher OUP Oxford
Pages 142
Release 2007-09-06
Genre Science
ISBN 0191647632

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The laws of thermodynamics drive everything that happens in the universe. From the sudden expansion of a cloud of gas to the cooling of hot metal, and from the unfurling of a leaf to the course of life itself - everything is directed and constrained by four simple laws. They establish fundamental concepts such as temperature and heat, and reveal the arrow of time and even the nature of energy itself. Peter Atkins' powerful and compelling introduction explains what the laws are and how they work, using accessible language and virtually no mathematics. Guiding the reader from the Zeroth Law to the Third Law, he introduces the fascinating concept of entropy, and how it not only explains why your desk tends to get messier, but also how its unstoppable rise constitutes the engine of the universe.

Methods and Tools for Effective Knowledge Life-Cycle-Management

Methods and Tools for Effective Knowledge Life-Cycle-Management
Title Methods and Tools for Effective Knowledge Life-Cycle-Management PDF eBook
Author Alain Bernard
Publisher Springer Science & Business Media
Pages 580
Release 2008-04-01
Genre Technology & Engineering
ISBN 3540784314

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Knowledge Management is a wide, critical and strategic issue for all the com- nies, from the SMEs to the most complex organizations. The key of competiti- ness is knowledge, because of the necessity of reactivity, flexibility, agility and innovation capacities. Knowledge is difficult to measure itself but what is visible, this is the way of improving products, technologies and enterprise organizations. During the last four years, based on the experience of most of the best experts around the World, CIRP (The International Academy for Production Engineering) has decided to prepare and structure a Network of Excellence (NoE) proposal. The European Community accepted to found the VRL-KCiP (Virtual Research La- ratory – Knowledge Community in Production). As its name indicates it, the aim of this NoE was really to build a «Knowledge Community in Production ». This was possible and realistic because the partners were representative of the most important universities in Europe and also because of strong partnerships with laboratories far from Europe (Japan, Australia, South Africa, USA, etc...). Based on such powerful partnership, the main issue was to help European manufacturing industry to define and structure the strategic knowledge in order to face the strategic worldwide challenges. Manufacturing in Europe currently has two essential aspects: 1. It has to be knowledge intensive given the European demands for high-tech products and services (e.g. electronics, medicines).