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

Table 4

Comparison of the theoretical value and the calculated value.

	Wavelet	db2	Sym2	Coif1	bior2.2
change point 1	theoretical value/s	0.3
	calculated value/s	0.29797	0.29797	0.31797	0.31797
	relative error/%	0.6771	0.6771	5.9896	5.9896
change point 2	theoretical value/s	0.5
	calculated value/s	0.49797	0.49797	0.51797	0.51797
	relative error/%	0.4062	0.4062	3.5937	3.5937
change point 2	theoretical value/s	0.8
	calculated value/s	0.81797	0.81797	0.79797	0.79797
	relative error/%	2.2461	2.2461	0.2539	0.2539