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Two-Faults Detection and Isolation Using Extended Parity Space Approach

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Authors
Lee, Won Hee; Kim, Kwang Hoon; Park, Chan Gook; Lee, Jang Gyu
Issue Date
2012-05
Publisher
The Korean Institute of Electrical Engineers
Citation
Journal of Electrical Engineering & Technology Vol. 7, No. 3, pp. 411- 419, 2012
Keywords
Fault detectionSensor failureTwo faultsHardware redundancy
Abstract
This paper proposes a new FDI(Fault Detection and Isolation) method, which is called
EPSA(Extended Parity Space Approach). This method is particularly suitable for fault detection and
isolation of the system with one faulty sensor or two faulty sensors. In the system with two faulty
sensors, the fault detection and isolation probability may be decreased when two faults are occurred
between the sensors related to the large fault direction angle. Nonetheless, the previously suggested
FDI methods to treat the two-faults problem do not consider the effect of the large fault direction
angle. In order to solve this problem, this paper analyzes the effect of the large fault direction angle
and proposes how to increase the fault dεtection and isolation probability. For the increase the
detection probability, this paper additionally considers the fault type that is not detected because ofthe
cancellation of the fault biases by the large fault direction angle. AIso for the increase the isolation
probability, this paper suggests the additional isolation procedure in case of two-faults. EPSA helps
that the user can know the exact fault situation. The proposed FDI method is verified through Montε
Carlo simulation.
Language
English
URI
https://hdl.handle.net/10371/76155
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Mechanical Aerospace Engineering (기계항공공학부)Journal Papers (저널논문_기계항공공학부)
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