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• W4319321736 abstract "Variational mode decomposition (VMD) has been widely applied in sensors. However, the mode number and balance parameter seriously limit VMD application. To solve this problem, this study proposes a novel method, which combines an improved energy fluctuation index (IEFI) and modified VMD (MVMD). In the proposed method, IEFI provided better performance to resist interference from random impulses by considering the periodicity of fault feature components. Consequently, it is applied to determine the initial center frequency for MVMD, which fixed the problem of the mode number. Moreover, a novel balance parameter search strategy, which can adaptively determine the optimal balance parameter, is combined with MVMD whose stop condition is replaced by kurtosis to extract the fault feature. Simulation results indicated that the proposed method does well in detecting the feature of a periodic impulse signal from the signal polluted by some interference impulses. Moreover, the bearing fault diagnosis results demonstrate that the proposed method can accurately detect bearing fault features. Furthermore, the method was validated with bearing fault data. The results showed that the method can accurately extract the fault characteristics of the impulse signal and achieve fault diagnosis." @default.
• W4319321736 created "2023-02-08" @default.
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• W4319321736 date "2023-02-06" @default.
• W4319321736 modified "2023-09-27" @default.
• W4319321736 title "Fault diagnosis of sensor pulse signals based on improved energy fluctuation index and VMD" @default.
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• W4319321736 doi "https://doi.org/10.3389/fphy.2023.1124485" @default.
• W4319321736 hasPublicationYear "2023" @default.
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