Research Article
Fault Diagnosis of Piezoelectric Sensor Patches for Vibration Control Based on Multifeature Fusion and Improved SVM
Table 3
SVD values of IMF components of three kinds of piezoelectric chip signals under noise signals.
| SVD values of the first five IMF components | Category | V1 | V2 | V3 | V4 | V5 |
| Normal | 102.96 | 68.49 | 38.59 | 29.65 | 21.02 | 110.99 | 65.91 | 39.81 | 30.50 | 22.85 | 109.15 | 68.94 | 42.12 | 31.32 | 21.36 | 112.88 | 67.84 | 38.71 | 30.52 | 21.85 | 113.75 | 70.22 | 40.20 | 26.75 | 21.58 |
| Broken | 96.70 | 60.76 | 41.65 | 29.48 | 21.24 | 100.16 | 63.44 | 43.02 | 29.34 | 19.88 | 103.56 | 61.43 | 41.58 | 31.31 | 21.54 | 104.46 | 62.89 | 40.55 | 30.37 | 21.72 | 102.14 | 67.64 | 43.06 | 28.01 | 20.42 |
| Degummed | 87.02 | 52.29 | 38.21 | 28.36 | 19.11 | 85.03 | 52.51 | 39.85 | 28.61 | 21.90 | 85.21 | 52.98 | 38.92 | 27.09 | 22.34 | 87.10 | 50.75 | 39.35 | 28.70 | 19.04 | 84.73 | 53.09 | 39.62 | 27.57 | 21.12 |
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