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

Figure 19

Frequency spectrum estimations of the bearing outer race fault signal in DE employing fractional lower order frequency spectrums and time-frequency representation ((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; (f) fractional lower order Choi-Williams time-frequency representation).

(a)

(b)

(c)

(d)

(e)

(f)