考虑弹目速度时变的攻击角约束终端滑模导引律  

Terminal Sliding Mode Guidance Law With Impact Angle Constraint Considering Time-varying Velocity of Missile and Target

作　　者：郭佳晖 田宗浩 蒋滨安 张航 Guo Jiahui;Tian Zonghao;Jiang Bin’an;Zhang Hang(High Overloaded Ammunition Guidance Control and Information Perception Laboratory,PLA Army Academy of Artillery and Air Defense,Hefei 230031,China)

机构地区：[1]陆军炮兵防空兵学院高过载弹药制导控制与信息感知实验室,合肥230031

出　　处：《战术导弹技术》2021年第5期87-93,共7页Tactical Missile Technology

基　　金：军队“十三五”预研基金项目(301070103)。

摘　　要：针对制导炮弹和地面目标速度变化导致传统导引律制导精度不高的问题,提出了一种考虑弹目速度时变的攻击角约束终端滑模导引律。设计了自适应扩张状态观测器对弹目速度变化进行估计与补偿,减小了切换项的增益。改进了传统指数趋近率,提高了滑模面到达段的动态品质,有效削弱了滑模面的抖振现象。通过数值仿真验证了该导引律的有效性,并与现有的导引算法进行了对比分析,结果表明,提出的导引律具有制导时间短、弹丸落速大以及命中精度高等优点。Aiming at the problem of low accuracy of traditional guidance law due to the velocity changes of guided projectiles and ground targets,a terminal sliding mode guidance law with impact angle constraint considering time-varying velocity of missile and target is designed.An adaptive extended state observer is designed to estimate and compensate the velocity changes of the projectile and the target,which is beneficial to reduce the gain of the switching item.The traditional exponential reaching law is improved to enhance the dynamic quality of the sliding surface reaching motion and the chattering phenomenon of the sliding surface is weaken effectively.The effectiveness of the proposed guidance law is verified by numerical simulation,and it is compared with the existing guidance algorithm.The results show that the proposed guidance law has the advantages of short guidance time,high projectile falling velocity and high hit accuracy.

关 键 词：制导炮弹 导引律 攻击角约束 滑模控制 扩张状态观测器 指数趋近律 抖振抑制 

分 类 号：TJ765.3[兵器科学与技术—武器系统与运用工程]