Intelligent Recognition Method of Turning Tool Wear State Based on Information Fusion Technology and BP Neural Network

Table 5

Energy analysis results of P4, P7, and P13 frequency bands of AE signal.

Frequency band	Mean and range	Experimental factors
		Degrees of wear	Spindle speed	Feed rate	Cutting depth
P4	Mean 1	1051.9	732.2	1821.5	1281.7
	Mean 2	1182.8	1159.8	1607.2	1754.3
	Mean 3	2157.1	2007.4	1306.6	1062.3
	Mean 4	1116.6	2164.9	1252.9	1618.9
	Range	1105.2	1432.7	568.6	692
P7	Mean 1	372.3	138.6	439.5	376.7
	Mean 2	331.4	250.9	499	432.3
	Mean 3	484.3	493.7	397	434.1
	Mean 4	489.3	794.1	341.7	434.2
	Range	157.9	655.5	157.3	57.5
P13	Mean 1	309.1	117.7	383.4	316.3
	Mean 2	255.8	209.1	422.5	354.5
	Mean 3	404.1	417.1	325.7	382.1
	Mean 4	445.0	670	282.4	361.1
	Range	189.2	552.3	140.1	65.8