为提高样条约束的弹道融合处理的精度,提出了一种基于抗差估计的弹道融合估计方法,该方法根据弹道处理中各类误差特性的不同,设计相应的标准进行分离,并实现异常值修正、系统误差迭代估计和样条节点的自适应调整,利用修正后的样条函数和观测向量再进行弹道解算可有效地提高解算的精度.通过算例分析验证了该算法的可行性和实用性,计算结果表明该方法能有效地抵御异常观测、系统误差及样条表示误差对弹道解算结果的影响.
Abstract
To improve the precision of trajectory fusion process,an estimation method based on robust estimation was presented.In this method,different methods were designed to separate all kinds of error according to their characteristics for trajectory process,and abnormal value modification and self adaptive adjustment of systemic error estimation and spline nodes were realized.The calculation precision can be improved by using the modified spline function and observation vectors to calculate trajectory again.The feasibility and practicability of this method were proved by data simulation.The result shows that this method can resist the effects of abnormal observation,systemic error and spline approach error on calculation result of trajectory.
关键词
外弹道 /
融合处理 /
样条 /
抗差估计
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Key words
external trajectory /
fusion process /
spline /
robust estimation
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