Research Article

Prediction on the Remaining Useful Life of Rolling Bearings Using Ensemble DLSTM

Figure 7

Time-domain feature correlation coefficient. (a) Bearing 1-2. (b) Bearing 2-1. 1: Mean. 2: Standard deviation. 3: Coefficient of variation. 4: Square root amplitude. 5: Root mean square. 6: Peak-to-peak. 7: Skewness. 8: Kurtosis. 9: Skewness factor. 10: Kurtosis factor. 11: Peak factor. 12: Margin factor. 13: Waveform factor. 14: Impulse index.
(a)
(b)