Fault Diagnosis of Piezoelectric Sensor Patches for Vibration Control Based on Multifeature Fusion and Improved SVM

Table 1

SVD values of the IMF components of the three types of piezoelectric patches.

SVD values of the first 5 IMF components
Category	V1	V2	V3	V4	V5
Normal	79.98	5.404	0.2844	0.2511	0.1096
	85.03	6.279	0.9019	0.0915	0.0505
	88.43	6.885	1.303	0.0836	0.0723
	88.92	7.165	1.452	0.2690	0.1587
	85.69	7.163	1.238	0.1158	0.0588
Broken	71.86	3.943	3.246	1.088	0.6276
	67.29	3.136	1.601	0.2429	0.1181
	71.77	3.272	2.689	0.3877	0.3001
	71.56	3.489	2.918	0.2870	0.2517
	74.15	3.268	2.914	0.5706	0.4317
Degummed	1.278	0.1099	0.0337	0.01631	0.009516
	1.233	0.1017	0.0231	0.01357	0.009732
	1.232	0.0974	0.0145	0.01144	0.006103
	1.269	0.1003	0.0484	0.02160	0.01327
	1.282	0.0983	0.0126	0.008394	0.005366