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Développement d'une méthode commune de diagnostic et pronostic basée sur un cadre formel de modélisation générique. Application à un module électro-hydrostatique aéronautique

Garance Vinson 1
1 LAAS-DISCO - Équipe DIagnostic, Supervision et COnduite
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : The aviation industry is a changing market where demands on the equipment are high, and competition is fierce among manufacturers. Therefore cost reduction, quality, reliability, operational availability and dependability become the cornestone of this industry. One of the levers that can support manufacturers to make their products more attractive for airlines is the optimization of maintenance. A way to achieve this is health-monitoring. In order to provide the integration of diagnosis and prognosis in one same method, this thesis proposes a formal approach of health-monitoring. One of the aims is to help in the optimization of maintenance operation. The method is based on a generic modeling framework. This framework represents the behavior of any complex system at a given time, and the evolution of its health over time depending on the stress it undergoes. The model summarizes the information needed for both diagnosis and prognosis. The diagnosis provides a good knowledge of all the damages and faults present in the components of the system, and any associated losses of performance and failures. From the result of diagnosis, the prognosis allows the prediction of the future health state of the system and the deduction of the nature and the times of occurrence of future possible failures. Performance metrics in the diagnosis and prognosis, as well as uncertainties related to prognosis, are discussed and integrated in the formal approach. The chosen application is the motor-pump of an electro-hydrostatic actuator, a technology pushed by Messier-Bugatti-Dowty to meet the needs of future all-electric aircrafts. The process of monitoring the health state focuses on two critical elements : a synchronous permanent magnet machine and a hydraulic pump The application shows the feasibility of health-monitoring, and highlights the problems that should be treated in the future to obtain, in particular, realistic aging laws.
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Submitted on : Wednesday, May 29, 2019 - 2:58:58 PM
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Garance Vinson. Développement d'une méthode commune de diagnostic et pronostic basée sur un cadre formel de modélisation générique. Application à un module électro-hydrostatique aéronautique. Automatique. Université Toulouse 3 Paul Sabatier (UT3 Paul Sabatier), 2014. Français. ⟨tel-02143697⟩

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