基于扰动观测器的高超飞行器建模及控制

提出了基于扰动观测器的高超声速飞行器控制器设计方法.针对高超声速飞行器的机体/发动机一体化设计布局、弹性轻质材料的广泛使用以及处于大高度和高马赫数的飞行条件的特点，建立了考虑推进及弹性影响的模型.在典型高超声速飞行器几何结构基础上，结合高超声速气动力学和气动弹性相关理论，建立了非线性纵向模型方程；分析模型不确定性的3种来源：参数、结构以及非结构，建立了非线性不确定模型；基于理论推导，采用基于扰动观测器的控制方法设计鲁棒控制器.仿真结果表明，本方法所设计的控制器在给定的不确定性范围内具有良好的鲁棒性.

Modeling and Disturbance Observer Based Control for a Hypersonic Vehicle

The disturbance observer based control was proposed for a hypersonic vehicle controller design. Hypersonic vehicles were typically characterized by a significant degree of interaction between the highly elastic airframe and the propulsion system. A nonlinear longitudinal dynamic model considering flexible effects and the coupling between the aerodynamics and propulsion systems was established. Then, the potential sources of uncertainty for this class of vehicle were discussed and three forms of uncertainty models were developed: real parameter, unstructured, and structured. The disturbance observer based control law was designed to improve the performance and robustness for nonlinear model. Finally, the simulation results show that the proposed method is feasible.