摘要
天基空间光学监视系统是天地一体化感知网络的重要组成部分,而基于相对运动轨道动力学的成像跟踪技术是实现天基空间目标定位定轨的基础。文章介绍了高精度天基成像跟踪系统的基本组成,并提出了基于相对运动轨道动力学模型及改进的SR-UKF跟踪算法的地球静止轨道(GEO)空间目标在轨高精度稳定跟踪定位方案。文章对两种相对运动轨道动力学模型在GEO目标跟踪中的效果进行了仿真,并以两种常用的模型作为参照进行了定量对比。仿真结果显示,文章所提出的跟踪算法方案能够实现三轴优于10cm精度的高带宽在轨稳定跟踪,可在天基相对运动跟踪研究及工程实践中用作参考。同时通过4种模型之间的仿真对比,发现在GEO目标相对跟踪中Schweighart模型比C-W模型精度高5%,但是计算量稍高。
As an important part of Space-Earth integration network,currently space-based optical surveillance system progresses rapidly.And the imaging tracking technology based on the relative orbital dynamics is fundamental to achieving the space-based space targets’position and orbit determination.In this paper,the composition of high-precision space-based imaging tracking system is illustrated,and then a stable orbit tracing scheme for GEO targets is proposed with high accuracy based on modified SR-UKF tracking algorithm.The proposed algorithm is compared and analyzed using multiple tracking models,including two models from relative orbital dynamics and two commonly used types.The simulation results demonstrate that the proposed tracking algorithm has an in-orbit tracing accuracy better than 10cm with high bandwidth and excellent stability,which can be used as a reference in the following research and engineering application of space-based target tracking.Simultaneously,one can also find from the comparison that Schweighart model possesses precision 5%higher than C-W model with a bit more calculation.
作者
程瑞
林喆张艾
于飞
何海燕
CHENG Rui;LIN Zhe;ZHANG Ai;YU Fei;HE Haiyan(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China)
出处
《航天返回与遥感》
CSCD
2020年第1期56-63,共8页
Spacecraft Recovery & Remote Sensing
基金
国家重大科技专项工程。
关键词
平方根无迹卡尔曼滤波
相对运动轨道动力学
成像跟踪
天基光学监视
square rooted unscented Kalman filtering
relative orbital dynamics
imaging tracking
space-based optical surveillance
