This paper introduces approximate entropy (ApEn) to address a nonlinear feature parameter of acoustic emission (AE) signal for the defect detection of rolling element bearings. With respect to AE signal, parameter selection of ApEn calculation is investigated, and appropriate parameters are suggested. Finally, an experimental study is presented to investigate the influence of various running conditions, i.e., radial load, rotating speed and defect size, on ApEn calculation. The results demonstrate that ApEn provides an effective measure for AE analysis and can be used as an effective feature parameter of AE signal for the defect detection of rolling element bearings.
Approximate Entropy Analysis of the Acoustic Emission From Defects in Rolling Element Bearings
Contributed by the Design Engineering Division of ASME for publication in the Journal of Vibration and Acoustics. Manuscript received April 25, 2011; final manuscript received May 4, 2012; published online October 29, 2012. Assoc. Editor: Thomas J. Royston.
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He, Y., and Zhang, X. (October 29, 2012). "Approximate Entropy Analysis of the Acoustic Emission From Defects in Rolling Element Bearings." ASME. J. Vib. Acoust. December 2012; 134(6): 061012. https://doi.org/10.1115/1.4007240
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