Gear Crack Level Classification Based on EMD and EDT

Table 1

The correlation coefficients and fault factor of IMFs.

Number
IMF1	0.471	0.001	0.470
IMF2	0.494	−0.007	0.501
IMF3	0.556	0.012	0.543
IMF4	0.384	−0.012	0.396
IMF5	0.285	0.001	0.284
IMF6	0.154	0.000	0.154
IMF7	0.028	−0.004	0.032
IMF8	0.005	0.000	0.005
IMF9	0.006	0.002	0.004
IMF10	0.017	0.005	0.013
IMF11	0.011	−0.005	0.016
IMF12	0.000	0.000	0.000
IMF13	0.001	0.000	0.000
IMF14	0.000	0.000	−0.001
IMF15	−0.001	0.000	−0.001