带有攻角约束的吸气式高超声速飞行器反步法控制

The angle of attack of the air-breathing hypersonic vehicle needs to be restricted to constrained within a certain extent to meet the working condition of the scramjet when the vehicle is maneuvering.For the angle of attack constraint control problem, a flight path angle tracking controller, which can limit the angle of attack, is developed by using the backstepping method and extended state observer.Based on the backstepping controller, the amplitude of the angle of attack response is limited by a compensator with the same order.When the angle of attack exceeds the threshold, the compensator generates a compensation signal by the different between the angle of attack and the threshold. The compensation signals modify the each step of control signals of the backstepping controller to limit the angle of attack. The extended state observer is also used to estimate and compensate the uncertain terms of the model, in order to improve the robustness of the control system. Stability analysis proves that the proposed method satisfies Lyapunov stability. The numerical simulation results show that the proposed method has good tracking performance. And the controller is available to limit the angle of attack under the condition of wind angle of attack.