Research Article
Joint Amplitude and Frequency Demodulation Analysis Based on Variational Mode Decomposition for Multifault Diagnosis of a Multistage Reducer
Table 1
Simulation signal parameters.
| Meshing frequency of planetary gear | | 648 | Meshing frequency of spur gear 1 | | 188 | Meshing frequency of spur gear 2 | | 68 | Rotation frequency of planet carrier | | 6.5 | Characteristic frequency of spur gear fault | | 1.9 | Characteristic frequency of the sun gear fault | | 23 | AM coefficient of path ii | | 0.03 | AM coefficient of path vi | | 0.03 | AM coefficient of the sun gear fault | | 1 | FM coefficient of the sun gear fault | | 2 | AM coefficient of paths 1 and 3 | | 0.03 | AM coefficient of paths 4 and 5 | | 0.03 | AM coefficient of the paths to the vibration signal of spur gear 1 | | 0.09 | AM coefficient of the paths to the vibration signal of spur gear 2 | | 0.06 | AM coefficient of the spur gear fault | | 1 | FM coefficient of the spur gear fault | | 1.5 |
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