1DCNN Fault Diagnosis Based on Cubic Spline Interpolation Pooling

Table 2

Correlation coefficients between the proposed method and the input signals.

Bearing states	Max pooling	Mean pooling	Cubic spline interpolation pooling
Normal state	0.3574	0.2824	0.3617
Rolling element damage	0.2513	0.2671	0.3336
Inner ring damage	0.3744	0.2463	0.3789
Outer ring damage	0.3912	0.1746	0.3558