推力矢量飞机纵向鲁棒动态逆控制

针对推力矢量飞机大迎角飞行纵向控制,提出一种鲁棒动态逆方法。对时标分离非线性动态逆的内外回路控制结构进行修改,通过坐标变换得到一个弱非线性系统;然后对该系统模型的已知部分和不确定部分同时进行小扰动线性化,转化得到线性不确定系统;在此基础上利用??综合方法设计鲁棒控制器。该方法能够为非线性动态逆控制提供鲁棒稳定性和鲁棒性能保证,并可回避时标分离问题。仿真结果验证了所提出方法的有效性。

Longitudinal control of aircraft with thrust vectoring using robust dynamic inversion

A robust dynamic inversion approach is proposed for the longitudinal control of an aircraft with thrust vectoring
at high angles of attack. The inner-loop-outer-loop control structure of the nonlinear dynamic inversion via time-scale
separation is modified, and a system with weak nonlinearity is obtained through coordination transformation. Then, the
model of this system, including both known and unknown parts, is linearized through little perturbation and translated into a
linear uncertain system, on this basis a robust controller is designed by using the ??-synthesis method. The proposed approach
can guarantee the robust stability and the robust performance of nonlinear dynamic inversion control, and it can also avoid
the need for time-scale separation. Simulation results show the effectiveness of the control approach.