Abstract
An adaptive fuzzy control strategy based on dynamic surface control (DSC) and input-to-state practically stable (ISpS) is proposed for hypersonic vehicle with uncertain parameters and external disturbances. The system is divided into two subsystems: velocity and altitude subsystem. The velocity subsystem is controlled via dynamic inversion method. For the altitude subsystem, the fuzzy logic systems are used to approximate the uncertainties in the model including uncertain terms and uncertain gains; the DSC scheme is able to overcome the explosion of complexity inherent in backstepping control. Input-to-state practical stability of the altitude subsystem is guaranteed although the model uncertainties and external disturbances exist. The simulation results show that this approach is effective for hypersonic vehicle.
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