基于全局估计的联邦卡尔曼滤波信息同步方法  

An Information Synchronous Method of Multi-ratio Sampling Federal Kalman Filtering

作　　者：张国良[1] 曾静[1] 邓方林[1] 

机构地区：[1]第二炮兵工程学院,西安710025

出　　处：《航天控制》2004年第5期42-44,72,共4页Aerospace Control

摘　　要：组合导航系统一般采用联邦卡尔曼滤波作为基本的状态估计方法。由于各导航子系统的观测周期一般不相同 ,因而存在导航系统的观测时刻与滤波器的滤波时刻不一致的问题。本文提出了一种应用全局估计量与不同步观测量共同进行时间更新 ,以获取同步观测信息的方法 。Each sub-system of integrated navigation system has its own observation period, thus cause the disagreement of the observing time of assistant navigation system and the filtering time of filter. A method was presented in this paper to attain synchronous observing information by updating time using global estimation and asynchronous measuring together. The validation of this method was testified by the results of simulation.

关 键 词：联邦卡尔曼滤波 多速率采样 信息同步 组合导航 

分 类 号：TN967.2[电子电信—信号与信息处理]