Research Article
Experimental Investigation for Fault Diagnosis Based on a Hybrid Approach Using Wavelet Packet and Support Vector Classification
Table 2
Bearing test samples.
| Cases | Energy ratios in each frequency band | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Normal | 0.5318 | 0.2206 | 0.0832 | 0.0256 | 0.0198 | 0.0292 | 0.0718 | 0.0180 | 0.5826 | 0.1843 | 0.0945 | 0.0200 | 0.0178 | 0.0232 | 0.0628 | 0.0148 | 0.5623 | 0.1877 | 0.0938 | 0.0209 | 0.0221 | 0.0251 | 0.0722 | 0.0160 |
| Rolling element fault | 0.0553 | 0.1541 | 0.1091 | 0.0403 | 0.0624 | 0.1990 | 0.3271 | 0.0528 | 0.1066 | 0.2799 | 0.0772 | 0.0219 | 0.0339 | 0.1315 | 0.3022 | 0.0469 | 0.0364 | 0.0993 | 0.0677 | 0.0355 | 0.0365 | 0.1707 | 0.4851 | 0.0686 |
| Inner race fault | 0.1295 | 0.1626 | 0.1031 | 0.0294 | 0.0504 | 0.0944 | 0.3612 | 0.0693 | 0.1548 | 0.2436 | 0.1546 | 0.0434 | 0.0392 | 0.0749 | 0.2385 | 0.0511 | 0.1403 | 0.1962 | 0.1596 | 0.0286 | 0.0309 | 0.0794 | 0.3197 | 0.0452 |
| Outer race fault | 0.0428 | 0.0640 | 0.0319 | 0.0170 | 0.0190 | 0.1508 | 0.5503 | 0.1243 | 0.0304 | 0.0416 | 0.0238 | 0.0117 | 0.0230 | 0.1421 | 0.5469 | 0.1805 | 0.0598 | 0.0867 | 0.0330 | 0.0135 | 0.0196 | 0.1422 | 0.5166 | 0.1285 |
| Compound fault | 0.0388 | 0.1612 | 0.1681 | 0.0670 | 0.0679 | 0.2692 | 0.1964 | 0.0313 | 0.0533 | 0.1979 | 0.2272 | 0.0811 | 0.0737 | 0.1538 | 0.1905 | 0.0224 | 0.0636 | 0.2239 | 0.1841 | 0.0691 | 0.0629 | 0.1777 | 0.1941 | 0.0246 |
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