RLV再入段六自由度制导控制律设计  

Six-DOF Guidance Control Law Design for RLV Re-entry Flight

作　　者：项凯 都延丽[1] 张鹏[2] 林海兵 XIANG Kai;DU Yanli;ZHANG Peng;LIN Haibing(Collage of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;803,Shanghai Academy of Spaceflight Technology,Shanghai 201109,China)

机构地区：[1]南京航空航天大学航天学院,江苏南京210016 [2]上海航天技术研究院803所,上海201109

出　　处：《机械制造与自动化》2020年第3期162-166,共5页Machine Building & Automation

基　　金：国家自然科学基金(61304099);南京航空航天大学研究生创新实验基金(kfjj20171505)。

摘　　要：针对RLV再入段六自由度制导控制问题,给出了一种结合高阶滑模跟踪制导律和带干扰观测器的Backstepping姿态控制律的综合制导控制架构,实现了高精度通用RLV的再入六自由度轨迹跟踪的设计与仿真。以HORUS-2B飞行器为研究对象,基于约束预测校正方法规划了再入标称轨迹;针对轨迹运动方程建立了基于高阶滑模的纵向轨迹制导律和侧向制导逻辑,设计了带有干扰观测器的Backstepping非线性姿态控制器,保证RLV姿态角跟踪的快速性和精准度,并将制导系统与姿态控制系统有效融合。通过蒙特卡洛仿真证明了设计的六自由度制导控制律具有良好的轨迹跟踪和较强克服模型不确定的能力。An integrated high order sliding mode guidance law and backstepping attitude control scheme is proposed for six-DOF guidance and control,thus achieving high precision six-DOF trajectory tracking of universal reusable launch vehicle(RLV).HORUS-2B vehicle is taken as object of study and the constrained predictive correction method is used to plan the reentry nominal trajectory.The longitudinal trajectory guidance law and lateral guidance logic are established based on high order sliding mode by the trajectory motion equations.The Backstepping attitude control law with disturbance observer is designed to guarantee timeliness and precision of attitude angle tracking,and this system is integrated with the guidance system effectively.Monte Carlo simulation shows that the six-DOF guidance control law designed possesses a good trajectory tracking accuracy and strong ability and its model uncertainty is overcome.

关 键 词：六自由度 制导控制 高阶滑模 Backstepping 干扰观测器 

分 类 号：V249.1[航空宇航科学与技术—飞行器设计] TP13[自动化与计算机技术—控制理论与控制工程]