Fault detection and diagnosis of technical systems

Authors:
Ioana Fagarasan;S. ST. Iliescu
Affiliations:
Automatic Control and Industrial Informatics Department, University "Politehinca" of Bucharest, Bucharest, Romania;Automatic Control and Industrial Informatics Department, University "Politehinca" of Bucharest, Bucharest, Romania
Venue:
ICAI'08 Proceedings of the 9th WSEAS International Conference on International Conference on Automation and Information
Year:
2008

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Abstract

Sensors, actuators and/or physical components in technical systems are often affected by unpermitted or un-expected deviations from normal operation behaviour. The fault diagnosis task consists of determination of the fault type with as many details as possible such as the fault size, locations and time of detection. The diagnostics procedures are based on the observed analytical and heuristical symptoms and the heuristic knowledge of the process. In this paper a comparison between different methods of fault detection and an overview of the fault diagnosis procedure for technical system is provided. For some classes of processes the structure and some parameters are well known but for others only rough models are available. Therefore the methods for fault detection and diagnosis are mainly different and several examples are explained.