Improved Envelope Spectrum via Feature Optimisation-gram (IESFOgram): A novel tool for rolling element bearing diagnostics under non-stationary operating conditions
Sign Up to like & getrecommendations! Published in 2020 at "Mechanical Systems and Signal Processing"
DOI: 10.1016/j.ymssp.2020.106891
Abstract: Abstract Demodulation methods are widely used for bearing diagnostics, based often on the (Squared) Envelope Spectrum after band pass filtering. One of the main challenges of these methods is the detection of a suitable band… read more here.
Keywords: bearing diagnostics; tool; band; speed ... See more keywords
Enhancement of decomposed spectral coherence using sparse nonnegative matrix factorization
Sign Up to like & getrecommendations! Published in 2021 at "Mechanical Systems and Signal Processing"
DOI: 10.1016/j.ymssp.2021.107747
Abstract: Abstract Integration of the spectral coherence over the domain of spectral frequency is one popular way for reaching the envelope spectrum which is an indispensable tool for the fault diagnosis of rotating machineries. Envelope spectrum… read more here.
Keywords: matrix factorization; coherence; spectral coherence; envelope spectrum ... See more keywords
A weighting function for improvement of spectral coherence based envelope spectrum
Sign Up to like & getrecommendations! Published in 2021 at "Mechanical Systems and Signal Processing"
DOI: 10.1016/j.ymssp.2021.107929
Abstract: Abstract Envelope analysis plays an essential role in fault diagnostics of rotating machinery. One popular method to attain the envelope spectrum is to integrate the spectral coherence over a chosen spectral frequency band. Considering the… read more here.
Keywords: envelope spectrum; spectral coherence; weighting function; coherence ... See more keywords
Nonсontact Spectral Express Method for Detecting Corrosion Damage to Metal Products
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DOI: 10.1134/s1061830920010118
Abstract: Abstract We propose to use the shape of the envelope of the spectrum of the collection of pulses received from metal products by a straight-beam electromagnetic-acoustic transducer as a new criterion for the presence of… read more here.
Keywords: envelope spectrum; non ontact; metal products; method ... See more keywords