基于样条约束“EMBET”再入轨道测量数据融合方法  

A Data Fusion Method for Re-entry Ballistic Measurement with Spline Restraint EMBET

作　　者：朱武宣[1] 高耀文[1] 

机构地区：[1]北京跟踪与通信技术研究所,北京100094

出　　处：《飞行器测控学报》2005年第6期49-53,共5页Journal of Spacecraft TT&C Technology

摘　　要：针对再入轨道最小二乘交会解算方法数据利用率低、轨道解算精度差的问题,提出并实现了基于样条约束“EMBET”的再入轨道测量数据融合处理方法.该方法认为再入飞行轨道在时序上是相关的,可以利用三次B样条函数精确表示,建立了关于样条函数参数和测量系统误差的测量模型,从而大量压缩了待估参数数量,准确自校准系统误差,提高了轨道估算的精度和稳定性.Least square intersection re-entry ballistic calculation method has the disadvantage of inefficient data usage and poor ballistic calculation accuracy. The paper presents and realizes a data fusion method for re-entry ballistic measurement with spline restraint EMBET, The method considers that re-entry ballistic trajectory has great time correlation and can be approached by 3^nd-order B-Spline function. Observation model is established accordingly, System error can be self-calibrated accurately because of reduction of undetermined parameters. As a result, the accuracy and stability of the ballistic calculation are improved.

关 键 词：样条函数 再入轨道测量 数据融合 EMBET 

分 类 号：V556.4[航空宇航科学与技术—人机与环境工程]