Fault Tolerant Control of a Class of Unknown Multivariable Nonlinear Systems Using Fuzzy Approximation

In this paper, we have developed an adaptive fuzzy fault tolerant control approach for a class of MIMO unknown nonlinear systems based on the idea of a corrective control law which activated in the presence of a fault. Online approximators, in the forms of fuzzy logic systems, are used to learn the unknown dynamics and the unknown fault functions on-line and provide the fault tolerant control law. The closed-loop stability of the proposed fault tolerant control scheme is rigorously proved using Lyapunov theory and illustrated based on a simulation example.