基于H∞鲁棒动态逆的飞行器轨迹跟踪方法

利用非线性动态逆方法的精确线性化功能,结合H_∞控制理论,提出了一种阻力加速度能量标准轨迹的跟踪方法。通过动态逆将非线性的高超声速飞行器系统等效为线性对象,继而考虑非结构不确定性及参数不确定性,采用H_∞控制理论设计外回路鲁棒控制器,实现了标准轨迹的精确跟踪,同时给出了闭环系统的鲁棒稳定性证明。仿真结果验证了该方法的有效性。

Trajectory tracking law for hypersonic vehicles based on H∞ robust dynamic inversion

In virtue of the precise linearization function of nonlinear dynamic inversion,a drag acceleration energy trajectory tracking law is proposed combined with H∞ control method. By dynamic inversion, the nonlinear hypersonic vehicle system is equivalent to a linear object. Considering both unstructured uncertainties and parametric uncertainties, the H∞ control method is employed to design a robust controller so as to achieve good tracking performance. Robust stability of the closed loop system under this tracking law is proved. Simulation results show the effectiveness of the proposed method.