Application of Variational Mode Decomposition and k-Nearest Neighbor Algorithm in the Quantitative Nondestructive Testing of Wire Ropes

Figure 8

Signal after denoising by several algorithms. (a) Raw signal. (b) EWT algorithm. (c) HHT-WFCS algorithm. (d) EEMD-wavelet algorithm. (e) Proposed algorithm.

(a)

(b)

(c)

(d)

(e)