As can be seen from the Figure 10, in the simulated signal with a SNR of −6 dB, the three initial center frequency settings can basically effectively extract the frequency of the original signal, there is a small amount of aliasing in the IMF components of the VMD decomposition when the...
Its goal is to extract low- dimensional data that contains fault feature information from high-dimensional data. Although components of the original signal become clear after decomposition, each mode is nonstationary and its fault feature information remains weak [14,15]. Signal dimensions increase ...