Fault detection and diagnosis from a hybrid system point of view

Feng, G., Djemaï, Mohamed, Guerra, T. M. and Busawon, Krishna (2016) Fault detection and diagnosis from a hybrid system point of view. In: 2016 4th International Symposium on Environmental Friendly Energies and Applications (EFEA). IEEE, Piscataway, pp. 1-6. ISBN 978-1-5090-0750-9

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Abstract

This paper gives an analysis of fault detection and diagnosis (FDD) from a hybrid system point of view. A simple RL circuit is used to illustrate detectability and modelling issues in traditional observer-based fault detection approaches. We show that traditional model-based FDD whereby a faulty model of the system is sought is not valid especially in the case of abrupt faults. We show that a more appropriate way to tackle the FDD problem is to derive a hybrid model of the system based on the fact that the occurrence of an abrupt fault will send the system from one mode (not necessarily safe) to another faulty mode. We also discuss the issue of fault sensitivity with respect to an output and show sits relation to fault detectability. Simulation results are presented to support all the arguments put forward.

Item Type:	Book Section
Uncontrolled Keywords:	Hybrid system, Fault detection, Fault detectability, Fault sensitivity
Subjects:	H600 Electronic and Electrical Engineering
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Becky Skoyles
Date Deposited:	10 Jan 2017 14:05
Last Modified:	12 Oct 2019 19:21
URI:	http://nrl.northumbria.ac.uk/id/eprint/29058

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