Abstract: For a class of uncertain nonlinear systems, based on the universal approximation property of fuzzy logic systems, a tracking controller was designed to track a given sign in the nonlinear system, based on the adaptive fuzzy logic system. First, the Mamdani type fuzzy logic system with the parameter adaptive laws was designed by utilizing the data information sampled from the input and output of unknown functions in the nonlinear system. Then this fuzzy logic system was introduced into a kind of controller to get a fuzzy tracking controller. Finally, it was simulated. The simulation shows the validity of the method.

Key words: nonlinear systems; adaptive fuzzy logic systems; fuzzy control