Research Article
The Extraction Method of Gearbox Compound Fault Features Based on EEMD and Cloud Model
Table 1
Single cloud model characteristics.
| Single cloud model | Type 1 (Ex, En, He) | Type 2 (Ex, En, He) | Type 3 (Ex, En, He) | Type 4 (Ex, En, He) | Type 5 (Ex, En, He) |
| IMF1 | −0.0079 | 0.0031 | −0.0029 | 0.0099 | −0.0088 | 0.9095 | 0.9678 | 0.7992 | 0.8819 | 1.8971 | 0.0707 | 0.0053 | 0.0036 | 0.0031 | — |
| IMF2 | −0.0016 | 0.000145 | −0.00063 | −0.0013 | 0.0017 | 0.4378 | 0.4501 | 0.3933 | 0.4161 | 0.8557 | 0.1680 | 0.1294 | 0.0812 | 0.1069 | 0.2029 |
| IMF3 | 0.0017 | 0.00037 | −0.0040 | −0.0007732 | 0.0005829 | 0.2791 | 0.3269 | 0.4423 | 0.2785 | 0.2540 | 0.0575 | 0.0397 | 0.1109 | 0.0523 | 0.0359 |
| IMF4 | −0.0014 | −0.0016 | 0.0002721 | 0.0001742 | 0.0014 | 0.1458 | 0.2288 | 0.1364 | 0.1758 | 0.2702 | 0.0297 | 0.0270 | 0.0177 | 0.0157 | 0.0426 |
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