Experimental Investigation for Fault Diagnosis Based on a Hybrid Approach Using Wavelet Packet and Support Vector Classification

Table 5

Gear test samples.

Cases	Energy ratios in each frequency band
	1	2	3	4	5	6	7	8
Normal	0.5055	0.3774	0.0664	0.0074	0.0285	0.0099	0.0034	0.0015
	0.4699	0.3989	0.0656	0.0089	0.0345	0.0160	0.0048	0.0014
	0.4881	0.4068	0.0555	0.0088	0.0257	0.0099	0.0038	0.0014
Broken teeth	0.5709	0.3092	0.0712	0.0152	0.0235	0.0068	0.0027	0.0006
	0.5425	0.3387	0.0668	0.0163	0.0238	0.0069	0.0038	0.0012
	0.5727	0.3254	0.0645	0.0111	0.0176	0.0059	0.0022	0.0006
Wear	0.8120	0.1040	0.0188	0.0055	0.0330	0.0255	0.0009	0.0003
	0.8267	0.0975	0.0175	0.0055	0.0301	0.0215	0.0009	0.0003
	0.8521	0.0831	0.0190	0.0061	0.0236	0.0141	0.0008	0.0010
Missing teeth	0.1902	0.3251	0.1063	0.0116	0.1712	0.1581	0.0334	0.0041
	0.1932	0.3082	0.0844	0.0244	0.1607	0.1909	0.0299	0.0083
	0.2200	0.2558	0.1340	0.0092	0.1816	0.1727	0.0212	0.0055