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Author: Their Ibrahim
Publisher:
ISBN:
Category :
Languages : fr
Pages : 246
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Book Description
Ce document décrit une contribution au prototypage virtuel de composants-métiers dans le contexte de la conception d’un système complexe multi-physique. Dans le cadre de cette vision, nous retenons 3 grands aspects à notre contribution : - Pour le seul métier de l’électronique de puissance, proposer des modèles des principaux composants de puissance à semiconducteur ; - Doter ces modèles de niveaux de représentation différents (depuis l’interrupteur jusqu’aux phénomènes physiques les plus importants) ; - Ecrire ces modèles avec le souci de l’échange inter-disciplinaire, et en arranger la liste sous la forme d’une bibliothèque. S’agissant de modèles dont une représentation au moins se veut physique, il est indispensable d’attacher aux modèles : - la procédure de l’identification des paramètres du modèle ; - la démonstration de la validation du modèle sur le plan expérimental. Une bibliothèque de modèles en VHDL-AMS est proposée pour la conception de convertisseur de puissance. La diode PiN, les transistors MOSFET et IGBT ont été modélisés classiquement, avec une approche à constantes localisées, pouvant être représentés graphiquement par un schéma électrique équivalent. Une telle représentation est suffisante pour les analyses électro-thermiques “ système ” du convertisseur de puissance. Une proposition de modèle thermique compact, en cohérence avec le compromis précision/complexité des autres modèles, est détaillée et vérifiée expérimentalement.
Author: Their Ibrahim
Publisher:
ISBN:
Category :
Languages : fr
Pages : 246
Get Book Here
Book Description
Ce document décrit une contribution au prototypage virtuel de composants-métiers dans le contexte de la conception d’un système complexe multi-physique. Dans le cadre de cette vision, nous retenons 3 grands aspects à notre contribution : - Pour le seul métier de l’électronique de puissance, proposer des modèles des principaux composants de puissance à semiconducteur ; - Doter ces modèles de niveaux de représentation différents (depuis l’interrupteur jusqu’aux phénomènes physiques les plus importants) ; - Ecrire ces modèles avec le souci de l’échange inter-disciplinaire, et en arranger la liste sous la forme d’une bibliothèque. S’agissant de modèles dont une représentation au moins se veut physique, il est indispensable d’attacher aux modèles : - la procédure de l’identification des paramètres du modèle ; - la démonstration de la validation du modèle sur le plan expérimental. Une bibliothèque de modèles en VHDL-AMS est proposée pour la conception de convertisseur de puissance. La diode PiN, les transistors MOSFET et IGBT ont été modélisés classiquement, avec une approche à constantes localisées, pouvant être représentés graphiquement par un schéma électrique équivalent. Une telle représentation est suffisante pour les analyses électro-thermiques “ système ” du convertisseur de puissance. Une proposition de modèle thermique compact, en cohérence avec le compromis précision/complexité des autres modèles, est détaillée et vérifiée expérimentalement.
Author: Peter J. Ashenden
Publisher: Elsevier
ISBN: 0080518362
Category : Computers
Languages : en
Pages : 909
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Book Description
The demand is exploding for complete, integrated systems that sense, process, manipulate, and control complex entities such as sound, images, text, motion, and environmental conditions. These systems, from hand-held devices to automotive sub-systems to aerospace vehicles, employ electronics to manage and adapt to a world that is, predominantly, neither digital nor electronic. To respond to this design challenge, the industry has developed and standardized VHDL-AMS, a unified design language for modeling digital, analog, mixed-signal, and mixed-technology systems. VHDL-AMS extends VHDL to bring the successful HDL modeling methodology of digital electronic systems design to these new design disciplines.Gregory Peterson and Darrell Teegarden join best-selling author Peter Ashenden in teaching designers how to use VHDL-AMS to model these complex systems. This comprehensive tutorial and reference provides detailed descriptions of both the syntax and semantics of the language and of successful modeling techniques. It assumes no previous knowledge of VHDL, but instead teaches VHDL and VHDL-AMS in an integrated fashion, just as it would be used by designers of these complex, integrated systems. - Explores the design of an electric-powered, unmanned aerial vehicle system (UAV) in five separate case studies to illustrate mixed-signal, mixed-technology, power systems, communication systems, and full system modeling.
Author: Adnan Hneine
Publisher:
ISBN:
Category :
Languages : fr
Pages : 184
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Book Description
L'approche de modélisation distribuée des composants bipolaires de puissance mise en œuvre de manière compacte par la résolution de l'équation de diffusion ambipolaire sous forme de décomposition en série de Fourier constitue un excellent compromis précision des résultats/temps de simulation. La mise en œuvre du moteur de calcul sous forme de ligne RC à paramètres variables en langage de description VHDL-AMS (IEEE 1076-1999) est présentée. La description du mécanisme de transport de charges dans les zones larges et peu dopées des composants de puissance, complétée par des modèles plus classiques des autres zones utilisées (émetteurs, région de charge d'espace ou de drift, canal MOS, couche tampon, etc...) permet de bâtir les modèles complets de diode PIN et de transistor IGBT. Ces différents modèles/sous-modèles de composants forment une bibliothèque qui permet une réutilisa- tion aisée dans d'autres contextes et par d'autres ingénieurs et ainsi une réduction du temps et du coût de conception des systèmes. Leur implantation en VHDL-AMS dans le logiciel Questa-ADMS permet de valider leur adaptation à la simulation des circuits de l'électronique de puissance et à leur prototypage virtuel. La température, intégrée à l'heure actuelle comme paramètre pourra à court terme être gérée en tant que quantité renvoyée par des modèles thermiques compacts. La méthodologie présentée associée aux caractéristiques du langage de description choisi permet d'envisager la création de modèles de nouveaux composants, issus de l'Intégration Fonctionnelle, par simple assemblage de différents sous-modèles. La possibilité de différents niveaux de description dans l'architecture de chaque sous- modèle autorise également une utilisation optimale à toutes les étapes du processus de conception des systèmes d'électronique de puissance.
Author: B. Jayant Baliga
Publisher: Wiley-Interscience
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 504
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Book Description
Written in a tutorial form, the text supplies in-depth the physics, design, and fabrication technology for power devices. Each chapter includes a discussion of the basic concepts of device operation and their electrical characteristics, a detailed analysis of the device physics, and the technology of fabrication. Extensive analytical solutions are used to enable the reader to obtain an understanding of the physics.
Author: Peter Fritzson
Publisher: John Wiley & Sons
ISBN: 0470937610
Category : Computers
Languages : en
Pages : 944
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Book Description
Provides an introduction to modern object-oriented design principles and applications for the fast-growing area of modeling and simulation Covers the topic of multi-domain system modeling and design with applications that have components from several areas Serves as a reference for the Modelica language as well as a comprehensive overview of application model libraries for a number of application domains
Author: Bartlomiej F. Romanowicz
Publisher: Springer Science & Business Media
ISBN: 9780792383062
Category : Technology & Engineering
Languages : en
Pages : 178
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Book Description
Over the past two decades, technologies for microsystems fabrication have made considerable progress. This has made possible a large variety of new commercial devices ranging, for example, from integrated pressure and acceleration microsensors to active micromirror arrays for image projection. In the near future, there will be a number of new devices, which will be commercialized in many application areas. The field of microsystems is characterized by its wide diversity, which requires a multidisciplinary approach for design and processes as well as in application areas. Although there is a common technological background derived from integrated circuits, it is clear that microsystems will require additional application-specific technologies. Since most microsystem technologies are based on batch processing and dedicated to mass production, prototyping is likely to be an expensive and time-consuming step. It is recognized that standardization of the processes as well as of the design tools will definitely help reduce the entry cost of microsystems. This creates a very challenging situation for the design, modeling and simulation of microsystems. Methodology for the Modeling and Simulation of Microsystems is the first book to give an overview of the problems associated with modeling and simulation of microsystems. It introduces a new methodology, which is supported by several examples. It should provide a useful starting point for both scientists and engineers seeking background information for efficient design of microsystems.
Author: Alexander V. Sergienko
Publisher: CRC Press
ISBN: 1420026607
Category : Science
Languages : en
Pages : 248
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Book Description
All current methods of secure communication such as public-key cryptography can eventually be broken by faster computing. At the interface of physics and computer science lies a powerful solution for secure communications: quantum cryptography. Because eavesdropping changes the physical nature of the information, users in a quantum exchange can easily detect eavesdroppers. This allows for totally secure random key distribution, a central requirement for use of the one-time pad. Since the one-time pad is theoretically proven to be undecipherable, quantum cryptography is the key to perfect secrecy. Quantum Communications and Cryptography is the first comprehensive review of the past, present, and potential developments in this dynamic field. Leading expert contributors from around the world discuss the scientific foundations, experimental and theoretical developments, and cutting-edge technical and engineering advances in quantum communications and cryptography. The book describes the engineering principles and practical implementations in a real-world metropolitan network as well as physical principles and experimental results of such technologies as entanglement swapping and quantum teleportation. It also offers the first detailed treatment of quantum information processing with continuous variables. Technologies include both free-space and fiber-based communications systems along with the necessary protocols and information processing approaches. Bridging the gap between physics and engineering, Quantum Communications and Cryptography supplies a springboard for further developments and breakthroughs in this rapidly growing area.
Author: Sandip Mazumder
Publisher: Academic Press
ISBN: 0128035048
Category : Mathematics
Languages : en
Pages : 484
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Book Description
Numerical Methods for Partial Differential Equations: Finite Difference and Finite Volume Methods focuses on two popular deterministic methods for solving partial differential equations (PDEs), namely finite difference and finite volume methods. The solution of PDEs can be very challenging, depending on the type of equation, the number of independent variables, the boundary, and initial conditions, and other factors. These two methods have been traditionally used to solve problems involving fluid flow. For practical reasons, the finite element method, used more often for solving problems in solid mechanics, and covered extensively in various other texts, has been excluded. The book is intended for beginning graduate students and early career professionals, although advanced undergraduate students may find it equally useful. The material is meant to serve as a prerequisite for students who might go on to take additional courses in computational mechanics, computational fluid dynamics, or computational electromagnetics. The notations, language, and technical jargon used in the book can be easily understood by scientists and engineers who may not have had graduate-level applied mathematics or computer science courses. - Presents one of the few available resources that comprehensively describes and demonstrates the finite volume method for unstructured mesh used frequently by practicing code developers in industry - Includes step-by-step algorithms and code snippets in each chapter that enables the reader to make the transition from equations on the page to working codes - Includes 51 worked out examples that comprehensively demonstrate important mathematical steps, algorithms, and coding practices required to numerically solve PDEs, as well as how to interpret the results from both physical and mathematic perspectives
Author: K. E. Brenan
Publisher: SIAM
ISBN: 9781611971224
Category : Mathematics
Languages : en
Pages : 268
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Book Description
Many physical problems are most naturally described by systems of differential and algebraic equations. This book describes some of the places where differential-algebraic equations (DAE's) occur. The basic mathematical theory for these equations is developed and numerical methods are presented and analyzed. Examples drawn from a variety of applications are used to motivate and illustrate the concepts and techniques. This classic edition, originally published in 1989, is the only general DAE book available. It not only develops guidelines for choosing different numerical methods, it is the first book to discuss DAE codes, including the popular DASSL code. An extensive discussion of backward differentiation formulas details why they have emerged as the most popular and best understood class of linear multistep methods for general DAE's. New to this edition is a chapter that brings the discussion of DAE software up to date. The objective of this monograph is to advance and consolidate the existing research results for the numerical solution of DAE's. The authors present results on the analysis of numerical methods, and also show how these results are relevant for the solution of problems from applications. They develop guidelines for problem formulation and effective use of the available mathematical software and provide extensive references for further study.
Author: Percy Seymour
Publisher: CRC Press
ISBN:
Category : Art
Languages : en
Pages : 168
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Book Description
The study of extraterrestrial magnetic fields is a relatively new one, confirmation of the existance of the first such field (that of our Sun) having come a s late as 1908. In the past 30 years a great ammount of knowledge has been accumulated on Cosmic Magnetism, which has turned out to be a truly fascinating topic for study. Percy Seymour's book is the first to deal with the topic in a non-mathematical way, and he offers a fine introduction to his subject. The first three chapters consolidate our knowledge on magnetism in general and the magnetic field of the Earth, as well as discussing the reasons for studying astronomy and cosmic magnetism in particular. The remainder of the book is devoted to the main areas of cosmic magnetism - solar, plantetary and interplanetary fields, fields in stars and pulsars, fields of the milky way and fields in other galaxies. Cosmic Magnetism in an ideal book for sixth-formers and undergraduates studying physics or astronomy and will also appeal to amateur astronomers. as previous work on this topic has been 'hidden' in specialised academic journals.
