Research Article
Root Crack Identification of Sun Gear in Planetary Gear System Combining Fault Dynamics with VMD Algorithm
Table 4
Central frequency of each IMF for 3# crack.
| | K | Central frequency of each IMF (Hz) | | IMF1 | IMF2 | IMF3 | IMF4 | IMF5 | IMF6 | IMF7 |
| | 2 | 1182 | 2735 | — | — | — | — | — | | 3 | 1182 | 1954 | 3457 | — | — | — | — | | 4 | 390.8 | 1122 | 2725 | 3767 | — | — | — | | 5 | 390.8 | 1182 | 1954 | 2846 | 4439 | — | — | | 6 | 390.8 | 1182 | 1954 | 2735 | 3457 | 4439 | — | | 7 | 390.8 | 1182 | 1954 | 2475 | 2846 | 3767 | 4499 |
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