Shock and Vibration / 2016 / Article / Fig 4

Research Article

Sparse Signal Representations of Bearing Fault Signals for Exhibiting Bearing Fault Features

Figure 4

Frequency spectra: (a) the frequency spectrum of the mixed signal; (b) the frequency spectrum of the optimal complex Morlet wavelet; and (c) the frequency spectrum of the signal filtered by the optimal complex Morlet wavelet transform.
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(b)
(c)