Fault Isolation for Nonlinear Systems Using Flexible Support Vector Regression

Figure 13

Function approximation using F-SVR and LS-SVR.

(a) Function approximation for normal status: 𝐺₁(𝑥)

(b) Function approximation for overcurrent fault: 𝐺₂(𝑥)

(c) Function approximation for leaning excitation fault: 𝐺₃(𝑥)