Direct adaptive fuzzy backstepping decentralized control for switched nonlinear large-scale systems

In this paper, an adaptive fuzzy output tracking decentralized control approach is proposed for a class of switched uncertain nonlinear large-scale systems under arbitrary switchings. Fuzzy logic systems are directly used to approximate the ideal intermediate control functions. Under the framework of the backstepping control design and fuzzy adaptive control, a direct adaptive fuzzy output tracking control method is developed. Based on common Lyapunov function theory, it is proved that the proposed control approach can guarantee that all the signals in the switched closed-loop system are semi-globally uniformly ultimately bounded (SGUUB) and the tracking error remains an adjustable neighborhood of the origin.