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Modèles et observateurs pour les systèmes d'écoulement sous pression. Extension aux systèmes chaotiques

Abstract : This work mainly deals with the application of nonlinear observers for the detectionof leaks (single, sequential and simultaneous) in pipes under pressure. Theproposed observers were conceived from a spatially discretized version of the waterhammer equations. This version was obtained using the finite difference method ,as an alternative to the orthogonal collocation method also considered. The discretemodels, as well as some observers were validated by a set of experiments realizedin test pipes. This work also gave rise to a new version of high gain observers fornon-uniformly observable systems. Firstly used for the purpose of leak detection,it was successfully applied to the synchronization of chaotic systems with unknownparameters as well. Its presentation includes a formal convergence proof, as well assimulation and experimental results.
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Submitted on : Friday, April 15, 2011 - 3:33:25 PM
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Flor Lizeth Torres Ortiz. Modèles et observateurs pour les systèmes d'écoulement sous pression. Extension aux systèmes chaotiques. Automatique / Robotique. Université de Grenoble, 2011. Français. ⟨NNT : 2011GRENT005⟩. ⟨tel-00586334⟩

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