Intelligent Diagnosis of Bogie Traction Seat Based on PCA-OVO and SVM Optimized by Modified Arithmetic Optimization Algorithm

Table 6

Frequency domain characteristic parameter values of the part of some large crack state samples.

The large crack state
Sample group	L1	L2	L3
Maximum value frequency	99.000	100.000	151.000
The power spectrum and	4731.593	5533.865	5384.857
Root mean square spectrum	739.136	742.950	742.958
Mean power spectrum	8.288	13.660	10.599
Variance of power spectrum	8.288	8.216	7.885
Power spectrum skewness	−6.375e − 09	−6.513e − 09	−6.501e − 09
Power spectrum kurtosis	0.000003	0.000005	0.000004
Relative peak of power spectrum	92.2905	91.317	80.250