Applications of Fractional Lower Order Frequency Spectrum Technologies to Bearing Fault Analysis

Figure 21

Frequency spectrum estimations of the bearing outer race fault signal in DE contaminated by distribution noise employing the fractional lower order frequency spectrum methods (, ) ((a) fractional lower order Blackman-Tukey method; (b) fractional lower order Periodogram method; (c) fractional lower order Welch covariation spectrum method; (d) fractional lower order AR model method; (e) fractional lower order ARMA model method).

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