Improvement of Adaptive GAs and Back Propagation ANNs Performance in Condition Diagnosis of Multiple Bearing System Using Grey Relational Analysis

Table 4

The proposed feature interval of the sixteen condition classes.

Number	Condition classes
C1	DE and FE Normal	[0.064, 0.088]	[−0.166, 0.336]	[2.361, 3.421]	[0.185, 0.291]	[0.054, 0.073]	[0.005, 0.008]	[29.942, 47.827]	[0.083, 0.114]	[2.966, 4.524]	[3.471, 5.279]
C2	FE Normal and DE IRF	[0.087, 0.094]	[−0.135, 0.247]	[2.831, 3.497]	[0.236, 0.330]	[0.068, 0.075]	[0.008, 0.009]	[30.717, 38.750]	[0.110, 0.119]	[3.465, 4.586]	[4.182, 5.487]
C3	FE Normal and DE ORF	[0.078, 0.093]	[−0.256, 0.009]	[2.636, 3.390]	[0.223, 0.368]	[0.062, 0.074]	[0.006, 0.009]	[29.835, 45.121]	[0.097, 0.117]	[3.482, 5.063]	[4.123, 6.018]
C4	FE Normal and DE BF	[0.033, 0.039]	[−0.131, 0.171]	[2.688, 3.380]	[0.099, 0.139]	[0.026, 0.031]	[0.001, 0.002]	[76.682, 104.733]	[0.192, 0.230]	[3.486, 4.797]	[4.087, 5.650]
C5	FE IRF and DE Normal	[0.063, 0.092]	[−0.191, 0.153]	[2.202, 5.258]	[0.198, 0.276]	[0.036, 0.077]	[0.004, 0.009]	[24.479, 55.206]	[0.103, 0.113]	[2.609, 5.978]	[2.975, 13.998]
C6	FE ORF and DE Normal	[0.083, 0.085]	[−0.114, 0.035]	[2.383, 2.672]	[0.199, 0.238]	[0.068, 0.070]	[0.006, 0.007]	[27.955, 33.393]	[0.101, 0.104]	[2.878, 3.458]	[3.358, 4.032]
C7	FE BF and DE Normal	[0.117, 0.121]	[−0.139, 0.038]	[1.978, 2.342]	[0.239, 0.319]	[0.099, 0.104]	[0.014, 0.015]	[17.123, 22.767]	[0.137, 0.144]	[2.343, 3.213]	[2.613, 3.671]
C8	FE IRF and DE IRF	[0.077, 0.092]	[−0.149, −0.014]	[2.579, 4.377]	[0.228, 0.286]	[0.054, 0.075]	[0.006, 0.009]	[28.882, 46.978]	[0.107, 0.114]	[3.173, 5.282]	[3.726, 9.742]
C9	FE IRF and DE ORF	[0.078, 0.093]	[−0.175, −0.014]	[2.441, 4.231]	[0.232, 0.309]	[0.051, 0.075]	[0.005, 0.009]	[29.705, 47.740]	[0.101, 0.114]	[3.280, 5.038]	[3.833, 9.406]
C10	FE IRF and DE BF	[0.046, 0.064]	[−0.151, 0.089]	[2.460, 4.083]	[0.157, 0.195]	[0.032, 0.053]	[0.003, 0.005]	[53.629, 70.318]	[0.073, 0.077]	[3.244, 4.872]	[3.747, 9.239]
C11	FE ORF and DE IRF	[0.085, 0.089]	[−0.081, 0.099]	[2.672, 3.084]	[0.227, 0.284]	[0.068, 0.072]	[0.007, 0.008]	[30.872, 36.071]	[0.106, 0.111]	[3.323, 4.022]	[3.895, 4.759]
C12	FE ORF and DE ORF	[0.081, 0.089]	[−0.150, 0.009]	[2.510, 2.961]	[0.221, 0.296]	[0.066, 0.072]	[0.006, 0.008]	[36.222, 37.993]	[0.100, 0.110]	[3.301, 4.154]	[3.855, 4.860]
C13	FE ORF and DE BF	[0.059, 0.061]	[−0.090, 0.074]	[2.637, 2.986]	[0.159, 0.175]	[0.047, 0.050]	[0.004, 0.0043]	[54.090, 67.421]	[0.073, 0.077]	[3.331, 3.920]	[3.874, 4.588]
C14	FE BF and DE IRF	[0.103, 0.107]	[−0.099, 0.079]	[2.474, 2.803]	[0.256, 0.321]	[0.085, 0.089]	[0.011, 0.012]	[24.912, 29.619]	[0.125, 0.131]	[3.062, 3.770]	[3.574, 4.393]
C15	FE BF and DE ORF	[0.098, 0.106]	[−0.155, −0.012]	[2.342, 2.731]	[0.255, 0.231]	[0.082, 0.088]	[0.010, 0.011]	[24.737, 32.152]	[0.118, 0.128]	[3.092, 3.805]	[3.576, 4.517]
C16	FE BF and DE BF	[0.076, 0.080]	[−0.111, 0.054]	[2.408, 2.767]	[0.175, 0.220]	[0.063, 0.067]	[0.007, 0.008]	[47.319, 61.536]	[0.091, 0.096]	[3.083, 3.805]	[3.553, 4.468]

[] is the close interval between and .