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• W2113104039 abstract "This paper presents a wavelet-based analytical redundancy method for the detection of faults in dynamic systems. In the proposed approach, consistency checks are carried out after band-limiting the signals under consideration to specific frequency ranges. For this purpose, the discrete wavelet transform is used to establish the frequency bands of analysis and a finite impulse response filter is employed to check the dynamic consistency of the data within each band. The filter weights can be adjusted by a simple parametric identification procedure on the basis of data acquired under normal operating conditions. The proposed method is illustrated by using experimental fault data from an analog computer, which was adjusted to emulate the dynamic response of a servomechanism, as well as simulated data representing a sensor fault scenario in the operation of a Boeing 747 aircraft. For comparison, a standard Luenberger observer fault detection scheme is also employed. The results show that the wavelet method compares favorably with the observer-based scheme in terms of sensitivity to the fault effect, false alarms, and nondetected faults." @default.
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• W2113104039 date "2008-05-01" @default.
• W2113104039 modified "2023-09-27" @default.
• W2113104039 title "A Wavelet Band-Limiting Filter Approach for Fault Detection in Dynamic Systems" @default.
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• W2113104039 doi "https://doi.org/10.1109/tsmca.2008.918593" @default.
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