Crack Growth Signal Processing Approach Combining Wavelet Threshold Denoising and Variable Amplitude DCPD Technique

Table 1

RMSE, SNR, and RMSE_a of the main DCPD signal before and after signal processing.

Data number	Signal	RMSE (μV)	SNR (db)	RMSE_a (mm)
1	VI1	0.22	16.12	0.53
	VSYN	0.03	46.34	0.07
2	VI1	0.12	15.61	0.29
	VSYN	0.02	49.43	0.05
3	VI1	0.13	15.52	0.32
	VSYN	0.02	48.53	0.05
4	VI1	0.16	15.94	0.39
	VSYN	0.02	47.07	0.05