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

Figure 20

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

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(b)

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(e)