Reliable Fault Diagnosis of Rotary Machine Bearings Using a Stacked Sparse Autoencoder-Based Deep Neural Network

Table 3

Reconstruction of SSAEs with different numbers of hidden layers and hidden nodes.

Number of hidden layers	Hidden layers nodes	Reconstruction error
2	200/200	0.014
2	200/100	0.011
2	100/100	0.020
2	100/50	0.022
3	200/200/200	0.008
3	200/100/50	0.010
3	100/50/25	0.019
4	500/250/125/62	0.006
4	200/200/100/100	0.006
4	200/100/50/25	0.014
4	100/50/25/10	0.019