Remaining Useful Life Prediction Method of Rolling Bearings Based on Pchip-EEMD-GM(1, 1) Model

Figure 5

The 11 features extracted from the bearing full life data.

(a) Time domain, RMS

(b) Time domain, peak-peak value

(c) Time domain, kurtosis

(d) Time domain, peak factor

(e) Frequency domain, spectrum mean

(f) Frequency domain, spectrum variance

(g) Frequency domain, spectrum RMS

(h) Time-frequency domain, E3

(i) Time-frequency domain, E7

(j) Time-frequency domain, S3

(k) Time-frequency domain, S7

(l) The time of data collection