HIGHLIGHTS
SUMMARY
The exponential harmonic signal ejϕk (t) is added in each modal component to correct the central frequency of the analytical signal of each mode. The collected vibration signals are denoised based on the proposed TS-WOA-VMD-CA-WT method. The corresponding NRR values of the three groups of signals denoised by different methods are shown in Table 4, where group 1, group 2, and group 3 signals are from the measured data of points A1, A2, and A3, respectively.①denotes TS- WOA-VMD-CA.②denotes WOA-VMD-CA. ③ denotes TS-VMD-CA . . .
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