Analysis of three-dimensional physical quantities for system diagnosis
Résumé
Most methods for system diagnosis are based on analysis of three-dimensional physical quantities. For example, electrical system monitoring is based on three-phase electrical measurements and 3D vibration analysis involves studying three-dimensional mechanical measurements. In three-dimensional space, such quantities follow a trajectory whose geometric characteristics are representative of the state of the monitored system. Usual techniques for diagnosis analyze such quantities component by component, without taking into account their three-dimensional nature or the geometric characteristics of their trajectory. A significant part of the information that may be useful for diagnosis is thus ignored. The main objective of this work is to estimate the geometric characteristics and trajectories of three-dimensional quantities using basic differential geometry concepts with the aim of developing tools for processing and analyzing 3D data. Such tools provide additional information for system diagnosis with respect to conventional methods and therefore increase their performance in terms of fault detection and localization. Simulated and experimental data concerning electrical power systems will be used to demonstrate the usefulness of this approach.
Origine : Fichiers produits par l'(les) auteur(s)
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