Research Article
Experimental Investigation for Fault Diagnosis Based on a Hybrid Approach Using Wavelet Packet and Support Vector Classification
Table 1
Bearing training samples.
| Cases | Energy ratios in each frequency band | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Normal | 0.5862 | 0.1738 | 0.0930 | 0.0252 | 0.0165 | 0.0263 | 0.0638 | 0.0155 | 0.4725 | 0.2200 | 0.1097 | 0.0295 | 0.0253 | 0.0338 | 0.0899 | 0.0193 | 0.5887 | 0.1845 | 0.0815 | 0.0210 | 0.0148 | 0.0219 | 0.0707 | 0.0168 |
| Rolling element fault | 0.0519 | 0.2047 | 0.1484 | 0.0389 | 0.0457 | 0.1648 | 0.3067 | 0.0390 | 0.0556 | 0.1537 | 0.1239 | 0.0471 | 0.0544 | 0.1664 | 0.3229 | 0.0761 | 0.0516 | 0.1457 | 0.0830 | 0.0415 | 0.0533 | 0.1692 | 0.4006 | 0.0551 |
| Inner race fault | 0.1458 | 0.2153 | 0.1452 | 0.0272 | 0.0292 | 0.0757 | 0.3030 | 0.0586 | 0.1691 | 0.2262 | 0.1234 | 0.0375 | 0.0446 | 0.0780 | 0.2779 | 0.0433 | 0.0857 | 0.1596 | 0.1210 | 0.0238 | 0.0343 | 0.1040 | 0.3967 | 0.0749 |
| Outer race fault | 0.0664 | 0.0448 | 0.0259 | 0.0129 | 0.0277 | 0.1449 | 0.5550 | 0.1224 | 0.0636 | 0.0410 | 0.0165 | 0.0111 | 0.0215 | 0.1190 | 0.5888 | 0.1386 | 0.0740 | 0.0311 | 0.0141 | 0.0090 | 0.0249 | 0.1745 | 0.5404 | 0.1321 |
| Compound fault | 0.0457 | 0.2360 | 0.2616 | 0.0623 | 0.0731 | 0.1457 | 0.1544 | 0.0213 | 0.0464 | 0.1528 | 0.1851 | 0.0691 | 0.0695 | 0.1925 | 0.2556 | 0.0291 | 0.0553 | 0.1896 | 0.2769 | 0.0748 | 0.0770 | 0.1263 | 0.1774 | 0.0228 |
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