Research Article
Fault Frequency Identification of Rolling Bearing Using Reinforced Ensemble Local Mean Decomposition
Table 4
Performance comparisons under strong background noise by decreasing SNR to 1/6 of the original data from CWRU dataset.
| Fault | Speed | Fault frequency | Rule of thumb | LMD + FSK | ELMD + FSK | Reinforced ELMD + FSK (proposed) | CFF (Hz) | Error (%) | AFF | CFF (Hz) | Error (%) | AFF | CFF (Hz) | Error (%) | AFF | CFF (Hz) | Error (%) | AFF |
| Inner | 1730 | 156.03 | 503.90 | 222.95 | 0.11 | 123.05 | 33.31 | 0.11 | 209.56 | 33.31 | 0.11 | 162.22 | 3.97 | 182.10 | 1750 | 157.84 | 395.50 | 150.57 | 0.11 | 134.77 | 14.62 | 0.22 | 163.59 | 3.64 | 0.12 | 163.59 | 3.64 | 23.67 | 1772 | 159.82 | 199.20 | 24.64 | 0.10 | 169.92 | 6.32 | 0.20 | 169.30 | 5.93 | 0.10 | 169.30 | 5.93 | 88.53 | 1797 | 162.08 | 334.00 | 106.07 | 0.13 | 190.80 | 17.83 | 0.14 | 190.80 | 17.83 | 0.14 | 181.90 | 12.20 | 482.10 |
| Outer | 1730 | 103.47 | 187.50 | 81.21 | 0.03 | 114.26 | 10.43 | 0.22 | 131.80 | 27.38 | 0.04 | 99.61 | 3.73 | 81.63 | 1750 | 104.66 | 474.60 | 353.47 | 0.03 | 111.30 | 6.34 | 0.04 | 111.30 | 6.34 | 0.04 | 108.40 | 3.57 | 49.44 | 1772 | 105.98 | 202.10 | 90.69 | 0.03 | 111.33 | 5.05 | 0.23 | 99.68 | 5.94 | 0.04 | 108.40 | 2.28 | 43.31 | 1797 | 107.47 | 345.70 | 221.67 | 0.04 | 99.61 | 7.31 | 0.28 | 128.90 | 19.94 | 0.03 | 108.40 | 0.87 | 37.70 |
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CFF denotes the calculated fault frequency. AFF denotes the amplitude at fault frequency.
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