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

Table 1

Run-time comparison of three methods under different SNR conditions.

Sampling points	SNR/dB	Running time/s
		Fourier spectrum	1.5 dimension spectrum	Bispectrum
1024	−20	0.819	0.968	3.87
	−10	0.736	0.975	2.93
	0	0.489	0.761	2.07
	10	0.314	0.653	1.97
	20	0.205	0.542	1.86