Techniques De Commande Pr Dictive Et Floue Pour Les Syst Mes Lectroniques De Puissance
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Techniques De Commande Pr Dictive Et Floue Pour Les Syst Mes Lectroniques De Puissance
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Author : Abdelouahab Bouafia
language : fr
Publisher:
Release Date : 2010
Techniques De Commande Pr Dictive Et Floue Pour Les Syst Mes Lectroniques De Puissance written by Abdelouahab Bouafia and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
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.
Commande Pr Dictive Des Syst Mes Hybrides Et Application La Commande De Syst Mes En Lectronique De Puissance
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Author : Cristina Vlad
language : fr
Publisher:
Release Date : 2013
Commande Pr Dictive Des Syst Mes Hybrides Et Application La Commande De Syst Mes En Lectronique De Puissance written by Cristina Vlad and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
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.
La Commande Pr Dictive
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Author : Patrick Boucher
language : fr
Publisher: Editions TECHNIP
Release Date : 1996
La Commande Pr Dictive written by Patrick Boucher and has been published by Editions TECHNIP this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Automatic control categories.
Neural Networks
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Author : Gérard Dreyfus
language : en
Publisher: Springer Science & Business Media
Release Date : 2005-11-25
Neural Networks written by Gérard Dreyfus and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-11-25 with Science categories.
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.
Bulletin Signal Tique Des T L Communications
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Author :
language : fr
Publisher:
Release Date : 1995
Bulletin Signal Tique Des T L Communications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Telecommunication categories.
Recursive Identification And Parameter Estimation
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Author : Han-Fu Chen
language : en
Publisher: CRC Press
Release Date : 2014-06-23
Recursive Identification And Parameter Estimation written by Han-Fu Chen and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-06-23 with Computers categories.
Recursive Identification and Parameter Estimation describes a recursive approach to solving system identification and parameter estimation problems arising from diverse areas. Supplying a systematic description of recursive estimation methods, it provides rigorous theoretical analysis of recursive solutions to problems of stochastic systems. Presenting the material and proposed algorithms in a manner that makes it easy to understand, the book provides readers with the modeling and identification skills required for successful theoretical research and effective applications.
Identification Of Dynamic Systems
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Author : Rolf Isermann
language : en
Publisher: Springer
Release Date : 2014-11-23
Identification Of Dynamic Systems written by Rolf Isermann and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-11-23 with Technology & Engineering categories.
Precise dynamic models of processes are required for many applications, ranging from control engineering to the natural sciences and economics. Frequently, such precise models cannot be derived using theoretical considerations alone. Therefore, they must be determined experimentally. This book treats the determination of dynamic models based on measurements taken at the process, which is known as system identification or process identification. Both offline and online methods are presented, i.e. methods that post-process the measured data as well as methods that provide models during the measurement. The book is theory-oriented and application-oriented and most methods covered have been used successfully in practical applications for many different processes. Illustrative examples in this book with real measured data range from hydraulic and electric actuators up to combustion engines. Real experimental data is also provided on the Springer webpage, allowing readers to gather their first experience with the methods presented in this book. Among others, the book covers the following subjects: determination of the non-parametric frequency response, (fast) Fourier transform, correlation analysis, parameter estimation with a focus on the method of Least Squares and modifications, identification of time-variant processes, identification in closed-loop, identification of continuous time processes, and subspace methods. Some methods for nonlinear system identification are also considered, such as the Extended Kalman filter and neural networks. The different methods are compared by using a real three-mass oscillator process, a model of a drive train. For many identification methods, hints for the practical implementation and application are provided. The book is intended to meet the needs of students and practicing engineers working in research and development, design and manufacturing.
Livres De France
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Author :
language : fr
Publisher:
Release Date : 2006
Livres De France written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with French imprints categories.
Advances In Unmanned Aerial Vehicles
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Author : Kimon P. Valavanis
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-02-26
Advances In Unmanned Aerial Vehicles written by Kimon P. Valavanis and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-02-26 with Technology & Engineering categories.
The past decade has seen tremendous interest in the production and refinement of unmanned aerial vehicles, both fixed-wing, such as airplanes and rotary-wing, such as helicopters and vertical takeoff and landing vehicles. This book provides a diversified survey of research and development on small and miniature unmanned aerial vehicles of both fixed and rotary wing designs. From historical background to proposed new applications, this is the most comprehensive reference yet.
Quad Rotorcraft Control
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Author : Luis Rodolfo García Carrillo
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-08-12
Quad Rotorcraft Control written by Luis Rodolfo García Carrillo and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-08-12 with Technology & Engineering categories.
Quad Rotorcraft Control develops original control methods for the navigation and hovering flight of an autonomous mini-quad-rotor robotic helicopter. These methods use an imaging system and a combination of inertial and altitude sensors to localize and guide the movement of the unmanned aerial vehicle relative to its immediate environment. The history, classification and applications of UAVs are introduced, followed by a description of modelling techniques for quad-rotors and the experimental platform itself. A control strategy for the improvement of attitude stabilization in quad-rotors is then proposed and tested in real-time experiments. The strategy, based on the use low-cost components and with experimentally-established robustness, avoids drift in the UAV’s angular position by the addition of an internal control loop to each electronic speed controller ensuring that, during hovering flight, all four motors turn at almost the same speed. The quad-rotor’s Euler angles being very close to the origin, other sensors like GPS or image-sensing equipment can be incorporated to perform autonomous positioning or trajectory-tracking tasks. Two vision-based strategies, each designed to deal with a specific kind of mission, are introduced and separately tested. The first stabilizes the quad-rotor over a landing pad on the ground; it extracts the 3-dimensional position using homography estimation and derives translational velocity by optical flow calculation. The second combines colour-extraction and line-detection algorithms to control the quad-rotor’s 3-dimensional position and achieves forward velocity regulation during a road-following task. In order to estimate the translational-dynamical characteristics of the quad-rotor (relative position and translational velocity) as they evolve within a building or other unstructured, GPS-deprived environment, imaging, inertial and altitude sensors are combined in a state observer. The text give the reader a current view of the problems encountered in UAV control, specifically those relating to quad-rotor flying machines and it will interest researchers and graduate students working in that field. The vision-based control strategies presented help the reader to a better understanding of how an imaging system can be used to obtain the information required for performance of the hovering and navigation tasks ubiquitous in rotored UAV operation.