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<dc:title xml:lang="en">Robust analysis of uncertain descriptor systems using non quadratic Lyapunov functions</dc:title>
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<dc:subject xml:lang="fr">Automatique</dc:subject>
<dc:subject xml:lang="fr">Systèmes descripteurs incertains</dc:subject>
<dc:subject xml:lang="fr">Fonctions de Lyapunov non quadratiques</dc:subject>
<dc:subject xml:lang="fr">Commande robuste</dc:subject>
<dc:subject xml:lang="fr">Inégalités matricielles linéaires (LMI)</dc:subject>
<dc:subject xml:lang="en">Automatic control</dc:subject>
<dc:subject xml:lang="en">Uncertain descriptor systems</dc:subject>
<dc:subject xml:lang="en">Nonquadratic Lyapunov functions</dc:subject>
<dc:subject xml:lang="en">Necessary and sufficient conditions</dc:subject>
<dc:subject xml:lang="en">Robust control</dc:subject>
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<tef:elementdEntree autoriteExterne="02781632X" autoriteSource="Sudoc">Fonctions de Liapounov</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="033589747" autoriteSource="Sudoc">Commande H-infini</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="176321519" autoriteSource="Sudoc">Inégalités matricielles linéaires</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="027244067" autoriteSource="Sudoc">Optimisation mathématique</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Les systèmes descripteurs incertains sont convenables pour la représentation des incertitudes d’un modèle, du comportement impulsif et des contraintes algébriques entre les variables d’état. Ils peuvent décrire bien plus de phénomènes qu’un système dynamique standard, mais, en conséquence, l’analyse des systèmes descripteurs incertains est aussi plus complexe. Des recherches sont menées de façon à réduire le degré de conservatisme dans l’analyse des systèmes descripteurs incertains. L’utilisation des fonctions de Lyapunov qui sont en mesure de générer des conditions nécessaires et suffisantes pour une telle évaluation y figurent. Les fonctions de Lyapunov polynomiales homogènes font partie de ces classes, mais elles n’ont jamais été employées pour les systèmes descripteurs incertains. Dans cette thèse, nous comblons ce vide dans la littérature en étendant l’usage des fonctions de Lyapunov polynomiales homogènes du cas incertain standard vers les systèmes descripteurs incertains.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Uncertain descriptor systems are a convenient framework for simultaneously representing uncertainties in a model, as well as impulsive behavior and algebraic constraints. This is far beyond what can be depicted by standard dynamic systems, but it also means that the analysis of uncertain descriptor systems is more complex than the standard case. Research has been conducted to reduce the degree of conservatism in the analysis of uncertain descriptor systems. This can be achieved by using classes of Lyapunov functions that are known to be able to provide necessary and sufficient conditions for this evaluation. Homogeneous polynomial Lyapunov functions constitute one of such classes, but they have never been employed in the context of uncertain descriptor systems. In this thesis, we fill in this scientific gap, extending the use of homogeneous polynomial Lyapunov functions from the standard uncertain case for the uncertain descriptor one.</dcterms:abstract>
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