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• W4307815895 abstract "To well extract the early fault characteristics of rotating machines, a new fast sparsity-enabled feature-energy-ratio method is investigated in this paper. This method includes two stages. In the first stage, the spectrum is adaptively segmented through a coarse-to-fine strategy based on the ordered local maximums. Thus, the fault characteristic band can be divided automatically. A novel index based on sparsity, energy ratio, and kurtosis, is constructed to evaluate periodic impulses in each sub-signal, and it can evaluate the periodic impulses from the globality and locality. In the second stage, the Fourier spectrum from the first stage are refined by an improved sparse coding shrinkage denoising (SCSD) method whose parameters can be dynamically determined for each point. Within the improved SCSD approach, the differential result of the amplitude spectrum is used as input to improve the sparsity. Moreover, the ratios between the SCSD output and its input are applied to weigh the Fourier spectrum and maintain the phase information. Finally, the inverse fast Fourier transform and squared envelope spectra are applied to detect the fault characteristics. Bearing and gearbox vibration signals are used to validate the proposed methodology. The experimental results show that the proposed method is superior to some typical methods and the proposed index are robust to the interferences from aperiodic impulses. Therefore, the proposed method has great potential in the fault diagnosis of rotating machine." @default.
• W4307815895 created "2022-11-06" @default.
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• W4307815895 date "2023-05-01" @default.
• W4307815895 modified "2023-10-17" @default.
• W4307815895 title "Rotating machine fault diagnosis by a novel fast sparsity-enabled feature-energy-ratio method" @default.
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• W4307815895 doi "https://doi.org/10.1016/j.isatra.2022.10.026" @default.
• W4307815895 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36357219" @default.
• W4307815895 hasPublicationYear "2023" @default.
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