一种改进的天基测向初定轨初值和模型求解方法  

An Improved Method of Solving Initial Value and Model of Initial Orbit Determination by Space-Based Angle Measurement

作　　者：刘磊[1] 郗晓宁[1] 戎鹏志[2] 

机构地区：[1]国防科学技术大学航天与材料工程学院,湖南长沙410073 [2]上海航天技术研究院,上海201109

出　　处：《上海航天》2009年第1期1-5,23,共6页Aerospace Shanghai

基　　金：武器装备预研重点基金

摘　　要：为改进Laplace法在天基测向初定轨中出现的迭代不收敛和平凡解,对原简单迭代求解法作改进,以优化算法中的变尺度法为解算算法,给出了考虑J2摄动并易于避免平凡解的初值求解方法。仿真结果表明:改进方法有效,不仅可成功解算原迭代方法失败的问题,而且能减少初定轨的整体计算量。To solve the problem of iteration non-convergence or convergence to the orbit of measurement satellite in using the present improved Laplace model and iteration method,an improved method of solving initial value and model of initial orbit determination by space-based angle measurement was put forward in this paper.The adjustable-scale algorithm was used in the improved method to iterate the improved Laplace model.The method of initial value solution was given out when the J_2 perturbation was under consideration,which could avoid the normal solution.The simulation results showed that the improved method was effective,which not only could solve the problems that the original iteration method was not able to solve but also would reduce the calculation for initial orbit determination.

关 键 词：天基测向 初定轨 改进Laplace法 变尺度法 迭代初值 

分 类 号：V556[航空宇航科学与技术—人机与环境工程]