Wear Identification of Vibration Drilling Bit Based on Improved LMD and BP Neural Network

Table 5

Comparison of recognition results.

Number	Tool wear condition	Actual output (three signal fusion)	Actual output (force signal)	Actual output (AE signal)	Actual output (vibration signal)
1	Intial	[0.9461 0.0126 0.0109]	[0.9054 0.0011 0.0114]	[0.9920 0.0335 0.0046]	[0.9756 0.0012 0.0193]
2	Initial	[0.9233 0.0052 0.0351]	[0.9745 0.0301 0.0143]	[0.9455 0.0195 0.0211]	[0.9533 0.0127 0.0279]
3	Initial	[0.9665 0.0271 0.0264]	[0.8910 0.0241 0.0108]	[0.8961 0.0359 0.0152]	[0.9873 0.0299 0.0075]
4	Initial	[0.9834 0.0074 0.0142]	[0.9471 0.0099 0.0241]	[0.9945 0.0217 0.0046]	[0.9681 0.0018 0.0179]
5	Initial	[0.9533 0.0341 0.0326]	[0.9466 0.0150 0.0223]	[0.9586 0.0310 0.0272]	[0.9550 0.0026 0.0501]
6	Initial	[0.8703 0.0052 0.0115]	[0.0161 0.9403 0.0544]	[0.9985 0.0803 0.0139]	[0.9383 0.0118 0.0043]
7	Initial	[0.9115 0.0271 0.0184]	[0.9722 0.0183 0.0124]	[0.8268 0.0331 0.0054]	[0.8754 0.0074 0.0211]
8	Initial	[0.9734 0.0062 0.0121]	[0.9101 0.0138 0.0079]	[0.9677 0.0356 0.0038]	[0.9314 0.0138 0.0088]
9	Normal	[0.0193 0.9601 0.0009]	[0.0319 0.9155 0.0032]	[0.0025 0.9291 0.0166]	[0.0323 0.9051 0.0429]
10	Normal	[0.0553 0.9305 0.0017]	[0.0166 0.9775 0.0207]	[0.8696 0.0372 0.0081]	[0.0037 0.9457 0.0009]
11	Normal	[0.0613 0.8201 0.0126]	[0.0960 0.0531 0.9138]	[0.0033 0.9435 0.0355]	[0.0316 0.0071 0.8788]
12	Normal	[0.0159 0.8776 0.0284]	[0.0088 0.9236 0.0431]	[0.0188 0.0623 0.8195]	[0.0091 0.9239 0.0131]
13	Normal	[0.0229 0.0080 0.9502]	[0.0154 0.0122 0.8070]	[0.0009 0.9472 0.0305]	[0.0142 0.8605 0.0072]
14	Normal	[0.0041 0.9917 0.0153]	[0.0073 0.9109 0.0251]	[0.0100 0.8939 0.0482]	[0.0026 0.0174 0.9523]
15	Normal	[0.0331 0.8074 0.0192]	[0.0192 0.9233 0.0095]	[0.0226 0.9752 0.0351]	[0.0135 0.9802 0.0402]
16	Normal	[0.0220 0.9455 0.0107]	[0.0360 0.9520 0.0142	[0.0042 0.9110 0.0025	[0.0560 0.9785 0.0311]
17	Severe	[0.0186 0.0233 0.9420]	[0.0102 0.0172 0.9611]	[0.0611 0.0009 0.9818]	[0.0031 0.0576 0.9008]
18	Severe	[0.0315 0.0203 0.8591]	[0.0360 0.0283 0.9838]	[0.0223 0.0349 0.8841]	[0.0510 0.0448 0.9177]
19	Severe	[0.0140 0.0113 0.9302]	[0.0109 0.0086 0.9779]	[0.0075 0.0570 0.9308]	[0.0195 0.0473 0.9220]
20	Severe	[0.0500 0.0396 0.9729]	[0.0077 0.0428 0.9601]	[0.0197 0.0411 0.9195]	[0.0080 0.0166 0.8753]
21	Severe	[0.0107 0.0133 0.8017]	[0.0145 0.0167 0.9810]	[0.0083 0.0049 0.9001]	[0.0311 0.0150 0.9741]
22	Severe	[0.0371 0.0091 0.9152]	[0.0013 0.0085 0.9077]	[0.0073 0.0530 0.8795]	[0.0241 0.0318 0.9109
23	Severe	[0.0960 0.0531 0.9138]	[0.0161 0.9403 0.0544]	[0.0106 0.0331 0.9544]	[0.0622 0.0373 0.9625]
24	Severe	[0.0357 0.0581 0.7940]	[0.0209 0.0101 0.9632]	[0.0096 0.0088 0.9417]	[0.0420 0.0307 0.9600]