基于非线性干扰观测器的高超声速飞行器反演滑模控制

针对高超声速飞行器非线性动力学系统中存在的高度非线性、多变量耦合及参数不确定等特点，利用非线性干扰观测器对各种干扰的逼近特性，结合反演滑模控制，设计了一种飞行器反演滑模控制器。该方法首先利用干扰观测器观测出系统的干扰，未观测出的部分干扰使用反演滑模控制进行补偿，避免了累积误差，实现对制导指令的鲁棒输出跟踪，并证明了系统稳定性。仿真结果验证了该方法能较理想地观测干扰，保证系统良好的鲁棒性。

Sliding mode backstepping control for hypersonic aircraft based on nonlinear disturbance observer

Aiming at the feature that hypersonic aircraft’s nonlinear dynamics system is highly nonlinear,multivariable coupled and includes uncertain parameters,a new backstepping sliding mode controller is designed based on nonlinear disturbance observer(NDO) and backstepping sliding mode control scheme.The NDO is used to observe the disturbance of the system.Sliding mode control is adopted in every backstepping design to compensate unknown disturbance.The approach prevents cumulative errors and realizes robust output tracking for guidance orders.The system is proved to be stable.Simulation results show this method can observe the disturbance ideally and enhance the robust performance of the system.