Research Article
Wavelet-Based Feature Extraction in Fault Diagnosis for Biquad High-Pass Filter Circuit
Table 3
Diagnosis rate of fault feature by Haar wavelet at five different decomposition levels.
| | Fault classes | 1 level | 3 levels | 5 levels | 7 levels | 9 levels |
| | Norm | 15% | 30% | 70% | 70% | 70% | | 1↑ | 95% | 75% | 90% | 90% | 90% | | 1↓ | 100% | 80% | 85% | 85% | 85% | | 4↑ | 0% | 15% | 20% | 30% | 30% | | 4↓ | 30% | 45% | 50% | 50% | 50% | | 2↑ | 25% | 45% | 45% | 55% | 55% | | 2↓ | 45% | 55% | 70% | 70% | 70% | | 3↑ | 95% | 85% | 95% | 100% | 100% | | 3↓ | 100% | 85% | 100% | 100% | 100% | | 2↑ | 100% | 100% | 100% | 100% | 100% | | 2↓ | 80% | 85% | 95% | 95% | 95% | | 1↑ | 35% | 75% | 95% | 95% | 95% | | 1↓ | 10% | 15% | 30% | 45% | 45% |
| | Average | 56.2% | 60.8% | 72.7% | 75.8% | 75.8% |
| | Increment | / | 4.6% | 11.9% | 3.1% | 0 |
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