Title Fault Diagnosis Method of Gearbox Multifeature Fusion Based on Quadratic Filter and QPSO-KELM

Table 3

Normalized fault characteristic parameters.

Parameters	Normal	Tooth miss	Tooth break	Tooth wear	Bearing inner race	Bearing outer race
NP1	−0.1722	−0.2070	−0.5214	−0.4619	0.2612	−0.0560
NP2	0.2163	0.0154	−0.2039	0.5636	−0.0097	−0.2371
NP3	0.3545	−0.0780	0.1330	−0.0686	−0.6341	−0.0873
NP4	−0.3568	−0.7051	−0.7467	0.3346	−0.5576	−0.0312
NP5	−0.2626	−0.3410	0.0753	0.4721	0.4040	−0.1450
NP6	0.0315	0.6561	−0.3575	−0.5123	0.3392	0.3301
NP7	0.2004	0.1586	0.1160	0.1654	−0.1836	−0.1569
NP8	−0.0779	0.2327	0.0570	−0.4184	−0.0005	−0.5677
NP9	−0.0356	−0.0050	−0.0466	−0.0359	−0.0488	−0.1385
NP10	0.2045	0.2679	0.2693	−0.3857	0.1252	0.2183
NP11	−0.3601	0.0658	0.0311	0.0880	−0.1048	−0.2282
NP12	−0.1763	−0.1525	−0.2617	−0.4034	−0.2318	0.1652
NP13	−0.5131	−0.0078	0.3056	−0.3098	−0.0876	−0.6876
NP14	−0.4827	0.3851	−0.1396	0.4718	0.0795	−0.3908
NP15	−0.1136	0.1951	−0.3124	−0.5820	−0.1669	0.1302
NP16	−0.2533	−0.0725	0.4445	0.3444	−0.0275	−0.3765
NP17	−0.3963	−0.3155	−0.2906	0.0142	−0.2101	−0.2109
NP18	−0.6192	−0.0573	0.1311	0.0116	0.1430	0.1435
NP19	−0.2871	0.2230	−0.0180	0.5400	0.1824	0.1822