摘要
针对临近空间高超声速、助推-滑翔式轨迹目标跟踪的问题,提出一种经度-纬度-高度坐标系(Longitude-Latitude-Altitude,LLA)下基于目标轨迹特性分析的三维投影跟踪算法。首先,针对临近空间目标在经纬方向上的线性高超声速运动和高度方向上高机动频率运动的不同,将目标量测分别投影到经纬平面和高度方向上,并通过分段跟踪处理,以减小耦合误差对目标跟踪精度的影响;接着,在对目标高超声速特性充分分析的基础上,利用经纬方向上的点迹归并和凝聚处理,以有效解决目标高超声速运动所引起的分裂问题;然后,在对目标高度IMM跟踪的基础上,通过对加速度突变的合理检测和补偿,以进一步实现目标在高度方向上高机动频率运动的可靠跟踪;最后,结合统计学原理,将目标在同一时刻不同跟踪段中的状态估计相关联,以有效实现临近空间高超声速、助推-滑翔式轨迹目标的精确跟踪。仿真结果表明,与现有的临近空间目标跟踪算法相比,该算法具有较高的定位跟踪精度。
To improve the tracking accuracy a hypersonic boost-to-glide target in near-space,a 3D projection tracking algorithm is proposed based on the characteristic analysis of target trajectory under the LLA coordinate. Firstly,according to the difference between hypersonic movement and high maneuvering frequency motion in different directions,the near-space target measurement is severally projected to both latitude-longitude plane and height direction to reduce the influence of coupling errors on the target tracking accuracy. Then based on the full analysis of target hypersonic characteristics,the plot merger and cohesion are performed in the latitude-longitude plane to solve the problem of target abruption. Thirdly,based on the IMM tracking algorithm,reasonable detection and compensation of acceleration gust is adopted to further achieve the robust tracking in the height direction. Finally,target state estimates in different directions at the same time are associated to realize the accurate tracking of near-space hypersonic boost-glide target. Simulation results show that near-space target tracking can be finished more effectively than existing methods by using the proposed algorithm.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2015年第10期1125-1132,共8页
Journal of Astronautics
基金
国家自然科学基金(61372027
61102165
61102167)
关键词
临近空间
高超声速目标
助推-滑翔式轨迹
交互多模型跟踪
Near-space
Hypersonic target
Boost-to-glide trajectory
Interactive multiple model tracking（IMMT）
