Wear Calculation-Based Degradation Analysis and Modeling for Remaining Useful Life Prediction of Ball Screw

Figure 9

Fitting curve of working condition 5 (axial load is 1 kN and rotational speed is 300 r/min). (a) Cross-validation 1, accelerometer 3. (b) Cross-validation 2, accelerometer 2. (c) Cross-validation 3, accelerometer 1.

(a)

(b)

(c)