In this article, a simple design of a fault tolerant control system applied to a ship propulsion system has been described. After a brief description of the system a fault and risk analysis has been carried out and set of possible remedial actions has been found. Then the synthesis of the control system, concerning the design of fault diagnosis algorithm and system reconfiguration algorithm, has been described. It is important to note, that in the first part of the article, as suggested by the benchmark description (see Zamanabadi and Blanke in 'Control Engineering Practice', 7(2), 227-239), we considered sensor faults limited to offset faults, but, since neither the FDI (Fault Detection and Isolation) methods nor the reconfiguration strategy are dependent on the behaviour of faults, it is possible to relax this constraint. The only requirement for successful FDI and reconfiguration is that the faults on sensors occur abruptly. This let us to consider also more realistic sensors faulty conditions, like physical or electrical damages, which can make the sensors to generate a zero output or a maximum output. Simulations results obtained in a general scenario of faults have shown the effectiveness of the control strategy used.
Fault-tolerant control of the ship propulsion system benchmark
Fehlertolerante Regelung eines Schiffsantriebs im Rahmen eines Vergleichstests.
Control Engineering Practice ; 11 , 5 ; 483-492
2003
10 Seiten, 7 Bilder, 4 Tabellen, 12 Quellen
Article (Journal)
English
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