摘要
研究RUV坐标系下的再入段弹道目标跟踪算法,该算法利用RUV坐标系下量测线性的优点,可提高目标跟踪精度。针对再入弹道目标,以东北天坐标系下目标运动加速度为基础,通过坐标转换,推导雷达阵面坐标系下的运动加速度;在此基础上通过二次求导及坐标转换推导RUV坐标系下的运动加速度,给出RUV坐标系下独立的状态方程和量测方程,并对采用扩展卡尔曼滤波所需要的关键函数给出显式表达。蒙塔卡罗仿真不同情况下的RUV坐标系下的再入弹道目标跟踪,仿真结果表明,在RUV坐标系下的跟踪较混合坐标系下的跟踪,其精度有大幅提高。
An algorithm for tracking reentry ballistic target in RUV coordinates is studied,which takes advantage of measurement linearity of the coordinates to enhance the target tracking accuracy.Based on the acceleration of reentry ballistic target in NEU coordinates,the acceleration in radar array surface coordinates is derived from coordinate conversion.Therefore,the acceleration in RUV coordinates is derived from secondary derivation and coordinate conversion.State equation and measurement equation with independence in RUV coordinates are presented,and the explicit expression for key functions acquired in extended Kalman filtering is provided.Monte-Carlo simulates the reentry ballistic target tracking in various conditions,and the results indicate that tracking accuracy in RUV coordinates is much higher than that in the mixed coordinates.
出处
《导弹与航天运载技术》
北大核心
2011年第2期52-57,共6页
Missiles and Space Vehicles
基金
中国博士后科学基金面上资助(20080441299)
中国博士后科学基金特别资助(200902672)
