Download or read book Commande robuste structur e et optimisation convexe written by Mohamed Yagoubi and published by . This book was released on 2003 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les systèmes informatiques de contrôle commande deviennent chaque jour plus performants et permettent la mise en oeuvre de régulateurs de sophistication croissante. De façon parallèle à cette évolution technologique, la théorie des systèmes linéaires se développe afin de tenir davantage compte des problèmes pratiques. La prise en compte des incertitudes de modélisation a conduit à développer l'axe "robustesse" de la commande des systèmes linéaires. Ce travail prolonge cette réflexion en cherchant à intégrer des contraintes (technologiques ou conceptuelles) sur la structure du régulateur à concevoir. L'approche "commande optimale" au sens d'un critère H2 ou H[infini] est privilégiée...

Download or read book Design of Distributed and Robust Optimization Algorithms A Systems Theoretic Approach written by Simon Michalowsky and published by Logos Verlag Berlin GmbH. This book was released on 2020-04-17 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optimization algorithms are the backbone of many modern technologies. In this thesis, we address the analysis and design of optimization algorithms from a systems theoretic viewpoint. By properly recasting the algorithm design as a controller synthesis problem, we derive methods that enable a systematic design of tailored optimization algorithms. We consider two specific classes of optimization algorithms: (i) distributed, and (ii) robust optimization algorithms. Concerning (i), we utilize ideas from geometric control in an innovative fashion to derive a novel methodology that enables the design of distributed optimization algorithms under minimal assumptions on the graph topology and the structure of the optimization problem. Concerning (ii), we employ robust control techniques to establish a framework for the analysis of existing algorithms as well as the design of novel robust optimization algorithms with specified guarantees.

Download or read book Commande robuste et performance des syst mes incertains written by Alexandre Trofino-Neto and published by . This book was released on 1993 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS CE MEMOIRE, LE PROBLEME DE LA COMMANDE ROBUSTE ET DE LA PERFORMANCE DES SYSTEMES INCERTAINS EST ETUDIE. LA METHODE UTILISE LA NOTION DE STABILITE QUADRATIQUE POUR LA ROBUSTESSE, ET LA NOTION D'ATTENUATION AU SENS DE LA NORME L#2 POUR LES PERFORMANCES (VIS-A-VIS DES PERTURBATIONS). L'EXPLOITATION EXPLICITE DE LA STRUCTURE DES INCERTITUDES CONDUIT A UNE FORMULATION TRES REALISTE DU PROBLEME ET UNE SOLUTION EST OBTENUE PAR DES TECHNIQUES D'OPTIMISATION CONVEXE NON DIFFERENTIABLE. TOUTEFOIS, LA COMPLEXITE DE L'ALGORITHME DE RESOLUTION PEUT DEVENIR EXCESSIVE, ET DANS CE CAS UNE SOLUTION PLUS SIMPLE EST PROPOSEE. CETTE DERNIERE NE PREND PAS EN COMPTE EXPLICITEMENT LES INCERTITUDES, ET ELLE PEUT ETRE VUE COMME UNE COMMANDE LQG SOUS UNE CONTRAINTE DE PASSIVITE

Download or read book Commande robuste des syst mes sous contraintes structurelles written by Arao Fischman and published by . This book was released on 1998 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE MEMOIRE TRAITE LE PROBLEME GENERAL DE LA SYNTHESE DE LOIS DE COMMANDE ROBUSTE POUR LES SYSTEMES SOUS CONTRAINTES STRUCTURELLES. LA CONTRIBUTION PRINCIPALE DE CE TRAVAIL CONSISTE EN LA SYNTHESE DE DEUX ALGORITHMES DE COMMANDE QUI TIENNENT EXPLICITEMENT COMPTE DES CONTRAINTES DE STRUCTURE SUR LE GAIN DE RETOUR D'ETAT OU DE SORTIE. LE PREMIER ALGORITHME CONSIDERE LE PROBLEME DE LA COMMANDE MULTI-OBJECTIF ET LE DEUXIEME TRAITE CELUI DE LA COMMANDE A COUT H#2 GARANTI. CES DEUX ALGORITHMES SONT BASES SUR LA RESOLUTION ITERATIVE D'UN PROBLEME D'OPTIMISATION CONVEXE DONT LES CONTRAINTES SONT EXPRIMEES SOUS LA FORME D'INEGALITES MATRICIELLES LINEAIRES (LMI). NOUS AVONS AUSSI MIS EN EVIDENCE L'APPLICABILITE DE L'UN DE CES ALGORITHMES AUX SYSTEMES DE PUISSANCE EN PROPOSANT UNE LOI DE COMMANDE DECENTRALISEE A COUT H#2 GARANTI POUR UN SYSTEME DE GENERATION ET DE DISTRIBUTION D'ENERGIE ELECTRIQUE.

Download or read book Techniques de commande robuste written by Christelle Manceaux-Cumer and published by . This book was released on 1998 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse concerne l'analyse et la synthèse de commandes, capables de stabiliser des systèmes linéaires en dépit d'incertitudes fréquentielles et paramétriques. Les travaux sont essentiellement axés sur la mise en œuvre pratique des méthodes de commande robuste. Mais, la prise en compte de la nature et de la structure de l'incertitude ainsi que le niveau de suffisance du critère de stabilité choisi rendent ce problème difficile à résoudre. Les méthodes couramment utilisées sont récapitulées mais ne répondent que partiellement au problème d'analyse. En particulier, les critères de stabilité mis sous forme de tests fréquentiels souffrent de l'échantillonnage fréquentiel et ne peuvent qu'induire des erreurs lors de la synthèse (μ-analyse et μ-synthèse). L'obtention de critères de stabilité pratiques pour la synthèse a donc orienté les travaux dans deux directions complémentaires. Le premier axe de recherche élabore des algorithmes fondés sur la théorie des multiplicateurs pour traiter des problèmes de type μ-synthèse (ou synthèse H2 robuste) dans lesquels les incertitudes peuvent être mixtes. Là encore, nous utilisons une heuristique classique qui alterne entre analyse, à correcteur fixé, et synthèse, à multiplicateur fixé mais qui présente l'avantage d'éviter l'échantillonnage en fréquences. Au préalable, les multiplicateurs sont choisis dans une base soit polynômiale soit rationnelle. Ces approches se formulent par des problèmes d'optimisation convexe, de type LMI. Le scond axe de recherche utilise une technqiue hybride identification / commande pour le calcul des marges paramétriques d'un système commandé (PRABI), fondée sur la qualité d'identification paramétrique. Cette technique est exploitée pour l'obtention d'un nouvel algotithme de désensibilisation. On robustifie itérativement un compensateur à structure donnée, tout en assurant un compromis performance / robustesse paramétrique. Cela nous amène à travailler successivement dans l'espace des paramètres définissant le correcteur, puis dans l'espace des paramètres inhérents au modèle. En fin, on propose une généralisation de la méthode d'analyse PRABI, nécessitant le calcul d'un correcteur LQG équivalent. Toutes ces techniques sont validées sur des cas tests et des problèmes réalistes de l'aéronautique (missile, satellite de télécommunication).

Download or read book Commande robuste des systemes non lin aires written by Iyad Balloul and published by . This book was released on 2000 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE CONCERNE LA ROBUSTESSE DES SYSTEMES NON LINEAIRES. ELLE PROPOSE DEUX METHODES DE SYNTHESE DE LOI DE COMMANDE ROBUSTE ET UNE METHODE D'ANALYSE DE LA ROBUSTESSE. ELLE COMPORTE TROIS PARTIES : LA PREMIERE PRESENTE UNE NOUVELLE FORMULATION DU PROBLEME D'ATTENUATION DES PERTURBATIONS. LA LOI DE COMMANDE EST CARACTERISEE PAR LA SOLUTION D'UNE EQUATION DE TYPE HAMILTON-JACOBI-ISSACS AVEC CONTRAINTES FINALES D'INEGALITE. LA METHODOLOGIE PROPOSEE UTILISE LES TECHNIQUES D'HORIZON GLISSANT. ELLE ABOUTIT A UNE LOI DE STABILISATION ROBUSTE PAR RETOUR D'ETAT DYNAMIQUE DISCONTINU. AFIN DE VALIDER CETTE METHODE, UNE APPROCHE NUMERIQUE POUR RESOUDRE L'EQUATION DE HJI EST DEVELOPPEE CONFORMEMENT A LA THEORIE PROPOSEE. LES IDEES INTUITIVES AINSI QUE L'EFFICACITE DU CALCUL NUMERIQUE ASSOCIE SONT ILLUSTREES PAR UN EXEMPLE DE PENDULE INVERSE SIMPLE ET UN EXEMPLE DE SATELLITE EN MODE DEFAILLANT. LA DEUXIEME PARTIE PROPOSE UN ALGORITHME DE RESOLUTION DU PROBLEME D'OPTIMISATION MIN-MAX. L'ALGORITHME EST MIS EN BOUCLE FERMEE DANS UN SCHEMA A HORIZON GLISSANT. LES SYSTEMES CONSIDERES NE SONT PAS NECESSAIREMENT AFFINES. LES CONTRAINTES SUR LA COMMANDE PEUVENT ETRE PRISES EN COMPTE, MEME SI CES CONTRAINTES DEPENDENT DE L'ETAT. L'APPROCHE PEUT TRAITER LES INCERTITUDES PARAMETRIQUES ET LES PERTURBATIONS NON STATIONNAIRES. DANS LE DOMAINE DES PROCEDES BATCH LA METHODE ABOUTIT A DES RESULTATS TRES INTERESSANTS. QUANT AU DOMAINE DE LA MACHINE ASYNCHRONE, LES RESULTATS OBTENUS, BIEN QU'ILS SOIENT PRELIMINAIRES, MONTRENT L'APPORT INEDIT DE CETTE METHODE, SURTOUT EN CE QUI CONCERNE LES QUESTIONS PRIMORDIALES DE LA ROBUSTESSE ET DU REJET D'HARMONIQUES. LA TROISIEME PARTIE ILLUSTRE L'APPLICATION DE LA THEORIE DU GAP METRIQUE A L'ANALYSE DE LA ROBUSTESSE DES SYSTEMES DYNAMIQUES. LE CONTEXTE DE LA COMMANDE$H-ISINFTY$EST CONSIDERE COMME EXEMPLE. L'ETUDE N'ABOUTIT PAS A UNE NOUVELLE CONCLUSION CONCERNANT LA COMMANDE$H-ISINFTY$, ELLE MONTRE, NEANMOINS, LE NOUVEL OUTIL D'ANALYSE DE LA ROBUSTESSE.

Download or read book Linear Matrix Inequalities in System and Control Theory written by Stephen Boyd and published by SIAM. This book was released on 1994-01-01 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book the authors reduce a wide variety of problems arising in system and control theory to a handful of convex and quasiconvex optimization problems that involve linear matrix inequalities. These optimization problems can be solved using recently developed numerical algorithms that not only are polynomial-time but also work very well in practice; the reduction therefore can be considered a solution to the original problems. This book opens up an important new research area in which convex optimization is combined with system and control theory, resulting in the solution of a large number of previously unsolved problems.

Download or read book Zonotopes written by Vu Tuan Hieu Le and published by John Wiley & Sons. This book was released on 2013-12-04 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title focuses on two significant problems in the field of automatic control, in particular state estimation and robust Model Predictive Control under input and state constraints, bounded disturbances and measurement noises. The authors build upon previous results concerning zonotopic set-membership state estimation and output feedback tube-based Model Predictive Control. Various existing zonotopic set-membership estimation methods are investigated and their advantages and drawbacks are discussed, making this book suitable both for researchers working in automatic control and industrial partners interested in applying the proposed techniques to real systems. The authors proceed to focus on a new method based on the minimization of the P-radius of a zonotope, in order to obtain a good trade-off between the complexity and the accuracy of the estimation. They propose a P-radius based set-membership estimation method to compute a zonotope containing the real states of a system, which are consistent with the disturbances and measurement noise. The problem of output feedback control using a zonotopic set-membership estimation is also explored. Among the approaches from existing literature on the subject, the implementation of robust predictive techniques based on tubes of trajectories is developed. Contents 1. Uncertainty Representation Based on Set Theory. 2. Several Approaches on Zonotopic Guaranteed Set-Membership Estimation. 3. Zonotopic Guaranteed State Estimation Based on P-Radius Minimization. 4. Tube Model Predictive Control Based on Zonotopic Set-Membership Estimation. About the Authors Vu Tuan Hieu Le is a Research Engineer at the IRSEEM/ESIGELEC Technopôle du Madrillet, Saint Etienne du Rouvray, France. Cristina Stoica is Assistant Professor in the Automatic Control Department at SUPELEC Systems Sciences (E3S), France. Teodoro Alamo is Professor in the Department of Systems Engineering and Automatic Control at the University of Seville, Spain. Eduardo F. Camacho is Professor in the Department of Systems Engineering and Automatic Control at the University of Seville, Spain. Didier Dumur is Professor in the Automatic Control Department, SUPELEC Systems Sciences (E3S), France.

Download or read book RAIRO written by and published by . This book was released on 1993 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Positive Polynomials in Control written by Didier Henrion and published by Springer Science & Business Media. This book was released on 2005-01-14 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Positive Polynomials in Control originates from an invited session presented at the IEEE CDC 2003 and gives a comprehensive overview of existing results in this quickly emerging area. This carefully edited book collects important contributions from several fields of control, optimization, and mathematics, in order to show different views and approaches of polynomial positivity. The book is organized in three parts, reflecting the current trends in the area: 1. applications of positive polynomials and LMI optimization to solve various control problems, 2. a mathematical overview of different algebraic techniques used to cope with polynomial positivity, 3. numerical aspects of positivity of polynomials, and recently developed software tools which can be employed to solve the problems discussed in the book.

Download or read book Statistical Inference for Ergodic Diffusion Processes written by Yury A. Kutoyants and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book in inference for stochastic processes from a statistical, rather than a probabilistic, perspective. It provides a systematic exposition of theoretical results from over ten years of mathematical literature and presents, for the first time in book form, many new techniques and approaches.

Download or read book Semiparametric Theory and Missing Data written by Anastasios Tsiatis and published by Springer Science & Business Media. This book was released on 2007-01-15 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes current knowledge regarding the theory of estimation for semiparametric models with missing data, in an organized and comprehensive manner. It starts with the study of semiparametric methods when there are no missing data. The description of the theory of estimation for semiparametric models is both rigorous and intuitive, relying on geometric ideas to reinforce the intuition and understanding of the theory. These methods are then applied to problems with missing, censored, and coarsened data with the goal of deriving estimators that are as robust and efficient as possible.

Download or read book 2018 Conference on Design of Circuits and Integrated Systems DCIS written by IEEE Staff and published by . This book was released on 2018-11-14 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: DCIS is an international meeting for researchers in the highly active fields of micro and nano electronic circuits and integrated systems It provides an excellent forum to present and discuss works on the emerging challenges offered by technology, in the areas of modeling, design, implementation and test of devices, circuits and systems New topics related to emerging technologies, security and new computing paradigms and hardware such as Machine Learning will be included in the 2018 edition

Download or read book Geometric and Numerical Foundations of Movements written by Jean-Paul Laumond and published by Springer. This book was released on 2017-05-02 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims at gathering roboticists, control theorists, neuroscientists, and mathematicians, in order to promote a multidisciplinary research on movement analysis. It follows the workshop “ Geometric and Numerical Foundations of Movements ” held at LAAS-CNRS in Toulouse in November 2015[1]. Its objective is to lay the foundations for a mutual understanding that is essential for synergetic development in motion research. In particular, the book promotes applications to robotics --and control in general-- of new optimization techniques based on recent results from real algebraic geometry.

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 CIKM 13 written by CIKM 13 Conference Committee and published by . This book was released on 2013-10-27 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt: CIKM'13: 22nd ACM International Conference on Information and Knowledge Management Oct 27, 2013-Nov 01, 2013 San Francisco, USA. You can view more information about this proceeding and all of ACM�s other published conference proceedings from the ACM Digital Library: http://www.acm.org/dl.

Download or read book Analysis and Optimization of Systems written by Alain Bensoussan and published by . This book was released on 1986 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: