Change Point Detection for Piecewise Envelope Current Signal Based on Wavelet Transform

Table 8

Comparison of envelope method with different wavelets.

Wavelet	Maximum modulus	Average modulus		Relative error/%	Average time/s
db2	0.6346	0.0732	8.6733	0.0201	0.2040
	0.1526		2.0849	0.0439
Sym2	0.6346	0.0732	8.6733	0.0201	0.2160
	0.1526		2.0849	0.0439
Coif1	0.3149	0.0771	4.0841	0.9265	0.2169
	0.1325		1.7190	1.4076
bior2.2	0.2063	0.0663	3.1064	0.9265	0.2401
	0.1659		2.4985	1.4076