高超声速飞行器纵向系统鲁棒协调控制器设计

飞行器在高超声速阶段，强非线性耦合与不确定性问题给飞行控制系统的设计带来了巨大的挑战。为了研究高超声速飞行器纵向控制系统中的间耦合关系，基于高超声速纵向非线性模型，对其状态变量组与输入变量组进行了耦合采样分析。同时考虑到系统的不确定性提出了一种分层鲁棒协调控制策略。对高超声速纵向的高度和速度子系统设计鲁棒与耦合补偿控制器，对姿态子系统设计鲁棒与耦合转换控制器。利用Lyapunov稳定性理论来分析整个闭环系统的稳定性。仿真表明该控制方法可以有效的应对纵向系统间的强耦合问题。

Longitudinal Robust Coordinated Control for a Generic Hypersonic Flight Vehicle

At hypersonic speed, strong nonlinear couplings and uncertainties bring enormous challenges to the control of a hypersonic flight vehicle. To study the coupling relationships, a new coupling analysis method is accomplished for the group of state variables and input variables by using statistical sampling method. Then, a new hierarchical coordinated control strategy, which combines a coupling compensator and a robust controller, is proposed to reject the coupling effects of the velocity subsystem and the altitude subsystem. In the attitude subsystem of longitudinal system, a coordinated transformation technique is introduced to solve the directive derivative coupling. The stability of the closed-loop system is analyzed by using Lyapunov theory. Simulation results demonstrate that the proposed controller can effectively coordinate the coupling impacts.