Evaluation on Filter Performance of Variational Mode Decomposition and Its Application in Separating Closely Spaced Modes

Figure 1

The averaged Fourier spectra of extracted modes for VMD realizations, in the case of three typical Hurst exponents: H = 0.2 (1^st row), H = 0.5 (2^nd row), and H = 0.8 (3^rd row). The initial center frequencies were uniformly distributed, for three different values of α (α = 1e3 (1^st column), 1e4 (2^nd column), and 1e5 (3^rd column)).