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

Figure 17

Frequency spectrum estimations of the normal bearing signal employing 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 method; (d) fractional lower order AR model method; (e) fractional lower order ARMA model method).

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