Research Article
Root Crack Identification of Sun Gear in Planetary Gear System Combining Fault Dynamics with VMD Algorithm
Table 5
Central frequency and amplitude of each IMF.
| | IMF | No crack | 1# crack | 2# crack | 3# crack | | f (Hz) | A (105) | f (Hz) | A (105) | f (Hz) | A (105) | f (Hz) | A (105) |
| | IMF1 | 360.7 | 1.866 | 511 | 7.536 | 400.8 | 7.502 | 390.8 | 9.014 | | IMF2 | 1182 | 2.424 | 1503 | 5.216 | 1192 | 6.678 | 1182 | 10.280 | | IMF3 | 1794 | 2.785 | 2014 | 6.298 | 1683 | 4.234 | 1954 | 7.243 | | IMF4 | 2555 | 3.731 | 2585 | 4.348 | 2465 | 5.817 | 2735 | 6.026 | | IMF5 | 3126 | 2.829 | 3677 | 3.447 | 3487 | 4.375 | 3457 | 6.187 | | IMF6 | 4168 | 3.529 | 4679 | 3.166 | 4529 | 4.184 | 4439 | 5.868 | | Total | — | 17.164 | — | 30.011 | — | 32.79 | — | 44.618 |
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