Research Article
A Method for Determining Intrinsic Mode Function Number in Variational Mode Decomposition and Its Application to Bearing Vibration Signal Processing
Table 12
Center frequency and comprehensive error.
| | Signal | Methods | Center frequency (Hz) | Error |
| | Normal_3 | FFT | 90 | 234 | 602 | 1065 | 2102 | — | | CFSA (K = 5) | 90 | 234 | 602 | 1065 | 2102 | 0 |
| | IR028_3 | FFT | 616 | 985 | 1481 | 2934 | | — | | MCFO (K = 5) | 616 | 763 | 1467 | 2782 | 0 | 2.2% | | CFSA (K = 4) | 616 | 739 | 1481 | 2934 | | 0 |
| | OR021@6_3 | FFT | 618 | 1339 | 2724 | 3399 | | — | | MCFO (K = 3) | 599 | | | 3436 | 0 | 1.3% | | CFSA (K = 4) | 618 | 1339 | 2724 | 3399 | | 0 |
| | B028_3 | FFT | 2714 | 2850 | 3143 | 3395 | | — | | MCFO (K = 3) | | 2850 | | 3311 | 0 | 0.7% | | CFSA (K = 4) | 2714 | 2850 | 3143 | 3395 | | 0 |
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