A proposal for the diagnosis of uncertain dynamic systems based on interval models
Doktorsavhandling, 2009

The performance of a model-based diagnosis system could be affected by several uncertainty sources, such as,model errors,uncertainty in measurements, and disturbances. This uncertainty can be handled by mean of interval models.The aim of this thesis is to propose a methodology for fault detection, isolation and identification based on interval models. The methodology includes some algorithms to obtain in an automatic way the symbolic expression of the residual generators enhancing the structural isolability of the faults, in order to design the fault detection tests. These algorithms are based on the structural model of the system. The stages of fault detection, isolation, and identification are stated as constraint satisfaction problems in continuous domains and solved by means of interval based consistency techniques. The qualitative fault isolation is enhanced by a reasoning in which the signs of the symptoms are derived from analytical redundancy relations or bond graph models of the system. An initial and empirical analysis regarding the differences between interval-based and statistical-based techniques is presented in this thesis. The performance and efficiency of the contributions are illustrated through several application examples, covering different levels of complexity.

PIV Building, Campus Montilivi, Universitat de Girona, Girona, Spain
Opponent: Prof. José Ragot, Centre de Recherche en Automatique de Nancy, Nancy Université, France. Prof. Sylviane Gentil, Laboratoire d'automatique de Grenoble, France. Prof. Louise Travé-Massuyès, LAAS-CNRS : Laboratoire d’Analyse et d’Architecture des Systèmes, France. Prof. Belarmino Pulido Junquera, Universidad de Valladolid, Spain. Prof. Joaquim Meléndez, Universitat de Girona, Spain.

Författare

Ämneskategorier

Data- och informationsvetenskap

ISBN

978-84-692-4278-0

PIV Building, Campus Montilivi, Universitat de Girona, Girona, Spain

Opponent: Prof. José Ragot, Centre de Recherche en Automatique de Nancy, Nancy Université, France. Prof. Sylviane Gentil, Laboratoire d'automatique de Grenoble, France. Prof. Louise Travé-Massuyès, LAAS-CNRS : Laboratoire d’Analyse et d’Architecture des Systèmes, France. Prof. Belarmino Pulido Junquera, Universidad de Valladolid, Spain. Prof. Joaquim Meléndez, Universitat de Girona, Spain.