Gear Fault Diagnosis Based on Empirical Mode Decomposition and 1.5 Dimension Spectrum

Figure 7

EMD-1.5 dimension spectrum (left) and Fourier spectrum (right) of simulated signal with different SNR. (a) SNR = 10 dB. (b) SNR = 0 dB. (c) SNR = −10 dB.

(a)

(b)

(c)