被动段扰动引力对闭路制导的影响及补偿方法研究  

Research on Compensation Method to Gravity Anomaly in Passive Ballistic Curve on Closed Loop Guidance

作　　者：王宗强 吴燕生 张兵 常晓华 Wang Zong-qiang;Wu Yan-sheng;Zhang Bing;Chang Xiao-hua(Beijing Institute of Astronautical Systems Engineering, Beijing, 100076;China Aerospace Science and Technology, Beijing, 100048)

机构地区：[1]北京宇航系统工程研究所,北京100076 [2]中国航天科技集团公司,北京100048

出　　处：《导弹与航天运载技术》2017年第5期49-53,共5页Missiles and Space Vehicles

摘　　要：针对被动段扰动引力对弹道式飞行器落点精度的影响问题,提出闭路制导对被动段扰动引力的实时补偿方法。建立动坐标系下自由段运动模型,导出由被动段摄动量计算落点位置的计算公式;分析扰动引力对闭路制导精度的影响机理,得出被动段扰动引力对闭路制导的影响仅与关机点位置相关的结论;进一步利用均匀设计理论,将被动段摄动量拟合为关机点位置偏差的函数,提出将摄动量作为扰动引力修正项引入闭路制导回路的实时补偿方法。仿真结果表明:验证补偿后落点偏差小于5 m,满足制导精度要求。For the problem that the impact of point deviation is influenced by the gravity anomaly in passive phase of the ballisticvehicle,a real-time compensation method in the process of closed loop guidance are proposed in this paper.Kinetic equations in freeflight phase are formed.And equations to calculate the impact point by perturbations are derived.Research on how the gravity anomalyinfluences the hit precession is carried on,through which the factors related to the gravity anomaly are fetched.A polynomial functionis established through Uniform Design to express the perturbations by position deviations on cutoff point.Then,a real-timecompensation method is derived in closed loop guidance to improve the hit precision.Finally,a serious of simulation proves that aftercompensation,the impact of point deviation is less than5m,which is sufficient to fulfill the guidance accuracy requirement.

关 键 词：扰动引力 被动段 闭路制导 均匀设计 补偿方法 

分 类 号：TJ765.1[兵器科学与技术—武器系统与运用工程]