可重复使用飞行器鲁棒自抗扰控制

为可重复使用飞行器再入提出一种新的鲁棒自抗扰控制方法.针对一般多输入多输出模型,重新定义状态变量后,分别设计各通道的线性扩张状态观测器.之后提出自抗扰控制系统的一套鲁棒分析与设计方法.应用于姿态控制时,引入最速跟踪微分器对姿态角指令进行滤波,以解决倾侧角反转过程中快速性与抗饱和之间的矛盾.仿真结果表明,设计的控制系统解耦效果良好,鲁棒稳定性较强,饱和问题也得到解决.

Robust Active Disturbance Rejection Control for a Reusable Launch Vehicle

A novel robust active disturbance rejection control approach is presented for a reusable launch vehicle during reentry. The state variables of a general multi input multi output model are redefined so that the linear extended state observers of every channel can be designed separately. Then a robust analysis and design methodology is proposed for the active disturbance rejection control system. When this methodology is applied to attitude control, the attitude command is filtered by the steepest tracking differentiator to deal with the contradiction between response speed and anti windup performance during bank reversal. Simulation results show that the designed control system is well decoupled and quite robust and the saturation problem is solved.