最优滑模飞行控制系统的设计与仿真

针对机动飞机按时标分离原则可分为快慢两个子系统而形成两环控制结构的特点，提出了最优滑模飞控系统的设计。外环控制器的设计采用基于依赖状态的Riccati方程最优控制器，用以产生最优滑模面，以保证整个飞控系统具有一定的性能鲁棒。内环控制器设计时采用滑动模控制以减小飞控系统对参数变化、模型误差、外部干扰敏感，具有一定的稳定鲁棒性。最后对机动飞机作大机动仿真，仿真结果表明该飞控系统是有效的。

Design and simulation of optimal sliding mode flight control system

A discussion is devoted to an optimal sliding mode control design for supermaneuverable flight control system which is divided into different subsystems according to the time scale separation principle in this paper. The outer loop controller is designed using State Dependent Riccati Equation (SDRE) optimal control which guarantees robustness of this flight control system. The outer loop controller generates an optimal sliding surface which is followed by a sliding mode controller in the inner loop. The inner loop is designed to minish the sensitivity of flight control system to parameter changes, model error and exterior disturbance. Finally, high angle of attack flight simulation is taken with the flight control system. The simulation results suggest that the flight control system is effective and useful.