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Network calculus based fault diagnosis decision-making for Networked Control Systems

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4 Author(s)
Christophe Aubrun ; Centre de Recherche en Automatique de Nancy, Nancy-Université, CNRS, Faculté des Sciences, BP 239, F-54506 Vandoeuvre les Nancy cedex, France ; Jean-Philippe Georges ; Dominique Sauter ; Eric Rondeau

This paper deals with the problem of Fault Detection and Isolation (FDI) in Networked Control Systems (NCS). The effects of unknown networked induced delays on conventional observed based residual generator are studied. It is shown that the detection performances may be reduced due to the sensitivity of the residuals signals to the delays. With the assumption that the network delays belong to a given bounded set, a threshold is defined on the basis of the network characteristic, in order to enhance the robustness of the decision making process. The detection thresholds, which depend on the bounded values of the network delays, are determined from the network calculus theory.

Published in:

2008 IEEE International Conference on Emerging Technologies and Factory Automation

Date of Conference:

15-18 Sept. 2008