Mechanical Fault Diagnosis Using Color Image Recognition of Vibration Spectrogram Based on Quaternion Invariable Moment

Table 2

Quaternion invariant moments data from four types of bearing.

Quaternion invariant moment
Inner race fault
1	0.253	0.536	0.378	0.411	0.403	0.227	0.323
2	0.391	0.790	0.443	0.438	0.438	0.299	0.377
3	0.348	0.717	0.279	0.353	0.366	0.131	0.226
Outer race fault
1	0.989	0.985	0.848	0.976	0.978	0.611	0.841
2	0.994	0.995	0.633	0.761	0.724	0.442	0.630
3	0.787	0.901	0.622	0.725	0.825	0.420	0.609
Normal
1	0.055	0.139	0.017	0.013	0.014	0.066	0.032
2	0.559	0.570	0.163	0.166	0.165	0.413	0.275
3	0.523	0.496	0.123	0.133	0.129	0.157	0.145
Ball bearing fault
1	0.489	0.792	0.352	0.325	0.340	0.263	0.292
2	0.508	0.903	0.362	0.437	0.500	0.202	0.320
3	0.450	0.700	0.444	0.403	0.409	0.391	0.429