Actuators Coupled Design Based Adaptive Backstepping Control of Air-breathing Hypersonic Vehicle*

In this paper, we study the robust design of the flight control system for the longitudinal dynamics of air-breathing hypersonic vehicles. First, the longitudinal dynamics model is divided into the velocity subsystem and the altitude subsystem. An adaptive controller is developed based on dynamic inversion method for the former subsystem, and an adaptive backstepping controller is proposed with coupled elevator and canard actuators for the latter, where the coupled design idea makes the control efficiency optimization. Then, the stability analysis shows that the closed system is asymptotically stable under certain conditions, and all the states of the closed-loop system are within a given flight envelope, which means that we realize the restriction control of the states of the vehicles. Finally, simulation illustrates the proposed method. Our designs differ with the published results in 4 aspects. Besides the couples actuators design, we give the specific controller solvers and control parameters selection approaches, and the controller designed doesn't contain the uncertain parameters which are cancelled adaptively.