Wavelet-Based Feature Extraction in Fault Diagnosis for Biquad High-Pass Filter Circuit

Table 5

Diagnosis rate of fault feature by different coefficients under a 7-level Haar wavelet packet decomposition.

Fault classes	Group A	Group B	Group C	Group D
Norm	0%	10%	70%	60%
1↑	35%	55%	90%	95%
1↓	0%	65%	85%	85%
4↑	5%	15%	30%	15%
4↓	0%	45%	50%	40%
2↑	65%	0%	55%	60%
2↓	5%	25%	70%	65%
3↑	95%	95%	100%	95%
3↓	100%	100%	100%	100%
2↑	95%	100%	100%	100%
2↓	100%	85%	95%	95%
1↑	0%	15%	95%	70%
1↓	0%	10%	45%	0%
Average	38.5%	54.6%	75.8%	67.7%