Remaining Useful Life Estimation of Fan Slewing Bearings in Nonlinear Wiener Process with Random Covariate Effect

Figure 5

Comparison of RUL between the M1 model, M2 model, and M3 model at different times. (a)  = 0.3 RUL estimation. (b)  = 2 RUL estimation. (c)  = 4 RUL estimation. (d)  = 6 RUL estimation. (e)  = 7 RUL estimation. (f)  = 8 RUL estimation. (g)  = 9 RUL estimation. (h)  = 10 RUL estimation. (i)  = 11 RUL estimation.

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