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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.
A new robust auto-disturbance rejection (DIDR) control method is proposed for re-entry of reusable aircraft. Aiming at the general MMI model, the linear expansion state observer of each channel is designed after the state variables are redefined. A set of robust analysis and design methods of control system is proposed.When applied to attitude control, the steepest tracking differentiator is introduced to filter the attitude angle command to solve the conflict between fastness and anti-saturation in the roll angle reversal process.The simulation results It shows that the designed control system decoupling effect is good, robust stability is strong, the saturation problem is also solved.