Sensor fault diagnosis based on energy balance evaluation: application to a metal processing.
This paper deals with the design of a residual generator for fault detection and isolation in the dynamic closed-loop systems based on the balance of energy which "enters" and "leaves" plants. The main contribution of this paper consists in developing a suitable fault detection and isolation technique to detect faults in single-input single-output closed-loop system based on major signals without the requirement of an accurate static or dynamic model. Indeed, in the absence of conventional input-output models, the proposed method involves the on-line energy balance evaluation to detect a sensor fault. The application to the monitoring of a galvanizing line in steel industry shows the effectiveness of the suggested approach when a sensor fault occurs.
Theilliol
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D
CRAN-UMR CNRS 7033, Faculté des Sciences et Techniques, Boîte Postalee 239, 54506 Vandoeuvre Cedex, France.
Noura
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H
Sauter
D
D
Hamelin
F
F