Download or read book Etude et mise au point de mod les d aide la conception de r gulateurs et application aux moteurs diesel written by Pascal Renard and published by . This book was released on 1988 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modélisation et simulation d'un moteur diesel. Elaboration d'un modèle paramétrique. Utilisation de la technique des graphes à liens. Application à la synthèse d'un régulateur (régulation numérique et régulation adaptative)

Download or read book Etude et mise au point d un logiciel d aide la gestion de simulations et application aux moteurs diesel written by Michel Hassenforder and published by . This book was released on 1987 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conception d'un logiciel pour la simulation d'un moteur diesel

Download or read book M thodes de recalage de mod les et application aux missions diesel written by and published by . This book was released on 2007 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Depuis plusieurs décennies, les véhicules européens sont soumis à des normes concernant leurs émissions polluantes. Pour faire face à ces contraintes de plus en plus importantes, les constructeurs automobiles ont fait appel à des solutions technologiques complexes notamment dans le cas des véhicules diesel. Cette situation a par ailleurs entraîné une complexification de la mise au point des moteurs puisque ces derniers possèdent un nombre croissant de paramètres de réglage. Notre travail de recherche s'est déroulé dans l'entreprise Renault SAS. Il a pour objectif de présenter des méthodes de recalage de modèles et une application de ses méthodes aux modèles d'émissions polluantes de moteur diesel. Depuis plusieurs années déjà, Renault utilise les techniques de plans d'expériences, de modélisation et d'optimisation pour résoudre le problème de la mise au point des moteurs diesel pour la dépollution. Si l'approche fonctionne bien, elle comporte néanmoins un défaut. Le processus de mise au point des moteurs diesel est itératif, et chaque itération apporte son lot de modifications matérielles. Dans ce cas, les modèles servant à prédire les émissions du moteur, qui sont des LOLIMOT, ne sont plus valables. Sachant que nous ne pouvons pas relancer le processus de modélisation pour des raisons de coup et de délais, une question se pose alors : "Comment recaler les modèles d'émissions après un changement de définition technique du moteur en faisant le moins d'essais possible ?". La contribution du travail de recherche se divise en deux approches. Une première voie utilise la théorie bayesienne. En se servant du modèle avant le changement comme d'un a priori ainsi que de nouveaux essais nous avons créé un algorithme permettant de recaler les modèles LOLIMOT. Nous proposons par ailleurs une méthode dérivée de la première intégrant en plus la connaissance que peuvent avoir les metteurs au point de leur moteur. Nous avons testé notre méthode en simulation puis sur des essais effectués sur un moteur 2 L diesel ayant subi différents changements de définition technique. Dans un deuxième temps, nous avons considéré que même si la théorie bayesienne permet d'intégrer certaines connaissances dans le recalage de modèles, elle ne permet pas d'utiliser directement les caractéristiques même de ce changement. Nous avons alors décidé de créer un modèle intégrant des paramètres physiques comme, par exemple, le nombre de trous des injecteurs. Nous avons alors, développé un modèle de combustion diesel. Ce dernier permet de simuler l'évolution des grandeurs thermodynamiques dans la chambre de combustion même dans le cas de la multi injection. Nous avons ensuite créé des modèles de polluants utilisant ces grandeurs comme entrées. Nous avons testé notre modèle sur de la prédiction de pression cylindre et de polluants sur un moteur 2L diesel.

Download or read book Moteurs Diesel d automobiles Conception et mise au point written by Pouille and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Etude et d veloppement de la mesure indirecte d efforts written by Quentin Leclère and published by . This book was released on 2003 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'objectif de ce travail est la mise au point d'une méthode de diagnostic permettant de quantifier par la mesure les sources vibratoires de machines en régime stationnaire. La mesure directe des sources par l'introduction d'un capteur d'effort est souvent difficile, voire impossible. On a donc recours à leur estimation indirecte à partir de mesures de réponse vibratoire en fonctionnement et d'un modèle de transfert de la machine. Sur le plan de la méthode, plusieurs développements originaux par rapport à la littérature sont abordés, notamment dans le but d'optimiser la technique lorsque la structure de la machine présente de fortes hétérogénéités de raideur. Par ailleurs, un indicateur de fiabilité de l'estimation indirecte des efforts est introduit, basé sur la comparaison de différentes approches d'inversion du système de transfert. La fiabilité des résultats est en effet un problème crucial en mesure indirecte d'efforts, car la technique est connue pour être fortement sensible aux différentes erreurs rencontrées (bruit de mesure, biais de modèle). La méthodologie est appliquée au problème d'identification des sources internes d'un moteur Diesel. Un effort particulier est porté sur la construction du modèle de transfert de la machine, estimé par deux approches numérique et expérimentale. Les efforts reconstruits sont comparés aux efforts obtenus par un modèle simple d'attelage mobile. La comparaison permet de mettre en évidence certaines lacunes du modèle, ainsi que la relative robustesse de la méthode. Dans le but de présenter l'un des intérêts de la mesure indirecte d'efforts, une hiérarchisation des contributions des excitations internes à la réponse du bloc moteur est réalisée.

Download or read book Basic Technics in Ecological Farming Techniques de Base en Agriculture Biologique Grunds tzliche Verfahren der kologischen Landwirtschaft Le Maintien de la Fertilit des Sols The Maintenance of Soil Fertility Die Erhaltung der Bodenfruchtbarkeit written by Stuart Hill and published by Birkhäuser. This book was released on 2013-12-14 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Perspectives for Agroecosystem Management written by Peter Schroder and published by Elsevier. This book was released on 2011-08-19 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable agriculture is a key concept for scientists, researchers, and agricultural engineers alike. This book focuses on the FAM- project (FAM Munich Research Network on Agroecosystems) of the 1990s as a means to assessing, forecasting, and evaluating changes in the agroecosystems that are necessary for agricultural sustainability. The management of two separate management systems: an organic and an integrated farming system are described to provide an interdisciplinary approach Changes of matter fluxes in soils, changes of trace gas fluxes from soils, precision farming in a small scale heterogen landscape, influence of management changes on flora and fauna, as well as the development of agroecosystem models, the assessment of soil variability and the changes in nutrient status are important aspects of this book.* Contains detailed results and insight of a long-time project on agricultural sustainability* Provides an interdisciplinary approach for comprehensive understanding by scientists and researchers of soil, plants, agriculture, and environment * Includes an international perspective

Download or read book A Designer s Guide to Asynchronous VLSI written by Peter A. Beerel and published by Cambridge University Press. This book was released on 2010-02-04 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Create low power, higher performance circuits with shorter design times using this practical guide to asynchronous design. This practical alternative to conventional synchronous design enables performance close to full-custom designs with design times that approach commercially available ASIC standard cell flows. It includes design trade-offs, specific design examples, and end-of-chapter exercises. Emphasis throughout is placed on practical techniques and real-world applications, making this ideal for circuit design students interested in alternative design styles and system-on-chip circuits, as well as circuit designers in industry who need new solutions to old problems.

Download or read book Introduction to Power Electronics written by Paul H. Chappell and published by Artech House. This book was released on 2013-12-01 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of power electronics is concerned with solid state devices for the control and conversion of electrical power. These silicon devices are designed mainly for switching the transfer current from one part of an electrical circuit to another. Power electronics has a wide range of applications from the small systems used in electrical appliances to very large systems for the supply and distribution of electricity. Although it can be difficult to completely define where the boundary lies between electronics and power electronics, this resource succeeds at breaking down the discipline. Containing the useful concepts and building blocks that go into making a power converter operate successfully, this book provides a description of the characteristics of different types of power semiconductor devices and their application to power converter circuits. Applications to power transmission, electric drives, and medical equipment are included to illustrate the wide range of power electronics in both small and high power circuits.

Download or read book Digital Circuits written by Ronald C. Emery and published by CRC Press. This book was released on 2020-11-25 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook is intended to introduce the student of electronics to the fundamentals of digital circuits, both combinational and sequential, in a reasonable and systematic manner. It proceeds from basic logic concepts to circuits and designs.

Download or read book Circuits for Electronic Instrumentation written by Thomas Henry O'Dell and published by Cambridge University Press. This book was released on 1991-08-30 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an up-to-date text on electronic circuit design. The subject is dealt with from an experimental point of view, but this has not restricted the author to well-known or simple circuits. Indeed, some very recent and quite advanced circuit ideas are put forward for experimental work. Each chapter takes up a particular type of circuit, and then leads the reader on to gain an understanding of how these circuits work by proposing experimental circuits for the reader to build and make measurements on. This is the first book to take such a practical approach to this level. The book will be useful to final year undergraduates and postgraduates in electronics, practising engineers, and workers in all fields where electronic instrumentation is used and there is a need to understand electronics and the interface between the instrument and the user's own experimental system. The book's references will also be a very helpful guide to the literature.

Download or read book A Practical Approach to Signals and Systems written by D. Sundararajan and published by John Wiley & Sons. This book was released on 2009-03-04 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concisely covers all the important concepts in an easy-to-understand way Gaining a strong sense of signals and systems fundamentals is key for general proficiency in any electronic engineering discipline, and critical for specialists in signal processing, communication, and control. At the same time, there is a pressing need to gain mastery of these concepts quickly, and in a manner that will be immediately applicable in the real word. Simultaneous study of both continuous and discrete signals and systems presents a much easy path to understanding signals and systems analysis. In A Practical Approach to Signals and Systems, Sundararajan details the discrete version first followed by the corresponding continuous version for each topic, as discrete signals and systems are more often used in practice and their concepts are relatively easier to understand. In addition to examples of typical applications of analysis methods, the author gives comprehensive coverage of transform methods, emphasizing practical methods of analysis and physical interpretations of concepts. Gives equal emphasis to theory and practice Presents methods that can be immediately applied Complete treatment of transform methods Expanded coverage of Fourier analysis Self-contained: starts from the basics and discusses applications Visual aids and examples makes the subject easier to understand End-of-chapter exercises, with a extensive solutions manual for instructors MATLAB software for readers to download and practice on their own Presentation slides with book figures and slides with lecture notes A Practical Approach to Signals and Systems is an excellent resource for the electrical engineering student or professional to quickly gain an understanding of signal analysis concepts - concepts which all electrical engineers will eventually encounter no matter what their specialization. For aspiring engineers in signal processing, communication, and control, the topics presented will form a sound foundation to their future study, while allowing them to quickly move on to more advanced topics in the area. Scientists in chemical, mechanical, and biomedical areas will also benefit from this book, as increasing overlap with electrical engineering solutions and applications will require a working understanding of signals. Compact and self contained, A Practical Approach to Signals and Systems be used for courses or self-study, or as a reference book.

Download or read book A Foundation in Digital Communication written by Amos Lapidoth and published by Cambridge University Press. This book was released on 2009-07-09 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt: This intuitive yet rigourous introduction derives the core results of digital communication from first principles. Theory, rather than industry standards, motivates the engineering approaches, and key results are stated with all the required assumptions. The book emphasizes the geometric view, opening with the inner product, the matched filter for its computation, Parseval's theorem, the sampling theorem as an orthonormal expansion, the isometry between passband signals and their baseband representation, and the spectral-efficiency optimality of quadrature amplitude modulation (QAM). Subsequent chapters address noise, hypothesis testing, Gaussian stochastic processes, and the sufficiency of the matched filter outputs. Uniquely, there is a treatment of white noise without generalized functions, and of the power spectral density without artificial random jitters and random phases in the analysis of QAM. This systematic and insightful book, with over 300 exercises, is ideal for graduate courses in digital communication, and for anyone asking 'why' and not just 'how'.

Download or read book Electronics written by Owen Bishop and published by Routledge. This book was released on 2010 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: -Companion website offers student and lecturer support.

Download or read book Complete Electronics Self Teaching Guide with Projects written by Earl Boysen and published by John Wiley & Sons. This book was released on 2012-07-09 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: An all-in-one resource on everything electronics-related! For almost 30 years, this book has been a classic text for electronics enthusiasts. Now completely updated for today's technology, this latest version combines concepts, self-tests, and hands-on projects to offer you a completely repackaged and revised resource. This unique self-teaching guide features easy-to-understand explanations that are presented in a user-friendly format to help you learn the essentials you need to work with electronic circuits. All you need is a general understanding of electronics concepts such as Ohm's law and current flow, and an acquaintance with first-year algebra. The question-and-answer format, illustrative experiments, and self-tests at the end of each chapter make it easy for you to learn at your own speed. Boasts a companion website that includes more than twenty full-color, step-by-step projects Shares hands-on practice opportunities and conceptual background information to enhance your learning process Targets electronics enthusiasts who already have a basic knowledge of electronics but are interested in learning more about this fascinating topic on their own Features projects that work with the multimeter, breadboard, function generator, oscilloscope, bandpass filter, transistor amplifier, oscillator, rectifier, and more You're sure to get a charge out of the vast coverage included in Complete Electronics Self-Teaching Guide with Projects!

Download or read book Embedded Controller Hardware Design written by Ken Arnold and published by Newnes. This book was released on 2001 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Review of electronics fundamentals -- Microcontroller concepts -- Worst-case timing, loading, analysis, and design -- Memory technologies and interfacing -- CPU bus interface and timing -- A detailed design example -- Programmable logic devices -- Basic I/O interfaces -- Other interfaces and bus cycles -- Other useful stuff -- Other interfaces.

Download or read book Basic Electronics for Scientists and Engineers written by Dennis L. Eggleston and published by Cambridge University Press. This book was released on 2011-04-28 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ideal for a one-semester course, this concise textbook covers basic electronics for undergraduate students in science and engineering. Beginning with the basics of general circuit laws and resistor circuits to ease students into the subject, the textbook then covers a wide range of topics, from passive circuits through to semiconductor-based analog circuits and basic digital circuits. Using a balance of thorough analysis and insight, readers are shown how to work with electronic circuits and apply the techniques they have learnt. The textbook's structure makes it useful as a self-study introduction to the subject. All mathematics is kept to a suitable level, and there are several exercises throughout the book. Password-protected solutions for instructors, together with eight laboratory exercises that parallel the text, are available online at www.cambridge.org/Eggleston.