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
CategoryV1V2V3V4V5

Normal102.9668.4938.5929.6521.02
110.9965.9139.8130.5022.85
109.1568.9442.1231.3221.36
112.8867.8438.7130.5221.85
113.7570.2240.2026.7521.58

Broken96.7060.7641.6529.4821.24
100.1663.4443.0229.3419.88
103.5661.4341.5831.3121.54
104.4662.8940.5530.3721.72
102.1467.6443.0628.0120.42

Degummed87.0252.2938.2128.3619.11
85.0352.5139.8528.6121.90
85.2152.9838.9227.0922.34
87.1050.7539.3528.7019.04
84.7353.0939.6227.5721.12