Extracting repetitive transients for rotating machinery diagnosis using multiscale clustered grey infogram

Chuan Li, Diego Cabrera, José Valente De Oliveira, René Vinicio Sanchez, Mariela Cerrada, Grover Zurita

Research output: Contribution to journalArticlepeer-review

81 Scopus citations

Abstract

© 2016 Elsevier Ltd. All rights reserved. Local faults of rotating machinery usually result in repetitive transients whose impulsiveness or cyclostationarity can be employed as faulty signatures. However, to simultaneously accommodate the impulsiveness and the cyclostationarity is a challenging task for rotating machinery diagnostics. Inspired by recently-reported infogram that is sensitive to either the impulsiveness or the cyclostationarity using spectral negentropy defined in time domain or frequency domain, a multiscale clustering grey infogram (MCGI) is proposed by combining both negentropies in a grey fashion using multiscale clustering. Fourier spectrum of the vibration signal is decomposed into multiple scales with different initial resolutions. In each scale, fine segments are grouped using hierarchical clustering. Meanwhile, both time-domain and frequency-domain spectral negentropies are taken into account to guide the clustering through grey evaluation of both negentropies. Numerical simulations and experimental tests are carried out for validating the proposed MCGI. For comparison, peer methods are applied to challenge different noises and interferences. The results show that, thanks to the multiscale clustering of the spectrum and the grey evaluation of both negentropies, the present MCGI is robust in extracting the repetitive transients for the rotating machinery diagnosis.
Translated title of the contributionExtracción de transitorios repetitivos para el diagnóstico de máquinas rotativas mediante Infograma de grises en grupos multiescala
Original languageEnglish
Pages (from-to)157-173
Number of pages17
JournalMechanical Systems and Signal Processing
DOIs
StatePublished - 1 Aug 2016

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