Research Article
Intelligent Diagnosis of Bogie Traction Seat Based on PCA-OVO and SVM Optimized by Modified Arithmetic Optimization Algorithm
Table 5
Frequency domain characteristic parameter values of the part of some small crack state samples.
| The small crack state |
| Sample group | S1 | S2 | S3 | Maximum value frequency | 250.000 | 250.000 | 250.000 | The power spectrum and | 203469054.902 | 205739152.481 | 205720098.156 | Root mean square spectrum | 62595.389 | 66442.623 | 60399.422 | Mean power spectrum | 343454.929 | 352560.766 | 349299.300 | Variance of power spectrum | 345356.266 | 340903.784 | 338663.515 | Power spectrum skewness | −4.660e − 09 | −4.660e − 09 | −4.659e − 09 | Power spectrum kurtosis | 0.000127 | 0.000136 | 0.000143 | Relative peak of power spectrum | 0.694 | 0.689 | 0.685 |
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