摘要
以观测模型能观度为基础,提出了一种基于能观度分析的信息融合方法。首先分析了影响脉冲星导航的主要误差来源,然后以火星环绕段为例,结合火星的两颗卫星中心矢量观测模型,通过格莱姆矩阵能观度分析方法考察观测模型的能观度。在能观度分析的基础上提出了一种观测信息系数分配方案。研究了适用于组合导航非线性问题的UKF滤波方法。通过数学仿真,验证了该方案的有效性。
Based on observability analysis of the model, a data fusion method is proposed. Firstly, the principle of X-ray pulsar is introduced, and main error sources affecting the navigation accuracy are ana- lyzed. And then, by taking the circle phase of Mars for example, the observability of the model based on the line of sight from the spacecraft to Phobos and Deimos is examined. An effective coefficient allocation scheme of information is proposed on the basis of the resulted observability. Finally, the schedule is demonstrated by using numerical simulation.
出处
《航天控制》
CSCD
北大核心
2011年第2期31-36,41,共7页
Aerospace Control
基金
国家863计划(2008AA12A203)
基础科研(A0320080019)资助项目
关键词
自主导航
脉冲星
能观度
信息融合
Pulsar
Autonomous navigation
Observability
Information fusion
