将下面的一段话翻译为英语：针对受模型不确定性和外部干扰影响的战斗机飞行控制问题利用设计的新型干扰观测器对系统的未知复合干扰进行估计和补偿结合改进的动态面控制方法设计了鲁棒控制器。飞机大迎角机动仿真表明：在气动参数具有较大不确定性和不可导外部干扰的情况下所设计的控制器能有效跟踪参考信号具有良好的鲁棒性

A robust controller was designed to address the problem of aircraft flight control under model uncertainty and external disturbances, by utilizing a newly designed disturbance observer to estimate and compensate for the unknown composite disturbances in the system, and combining it with an improved dynamic surface control method. Simulation results of high angle of attack maneuvers show that the designed controller is effective in tracking the reference signal under highly uncertain aerodynamic parameters and non-differentiable external disturbances, and exhibits good robustness.