南京航空航天大学学报（英文版）2023，Vol.40Issue(z2)：48-53,6.DOI:10.16356/j.1005-1120.2023.S2.007
基于正逆向滤波的四位置对准
Four-Position Initial Alignment Based on Forward and Reverse Filtering
摘要
Abstract
In order to achieve fast and high accuracy of strapdown initial alignment,a four-position initial alignment algorithm based on forward and reverse filtering is proposed.The proposed scheme divides the whole alignment process into three stages:Coarse alignment,backtracking alignment and fine alignment.In the first stage,coarse alignment is performed,and data are collected and stored.In the second stage,the unscented Kalman filter(KF)is used for backtracking alignment.In the third stage,the KF is used for fine alignment.Four-position data are sampled in the whole process.The proposed scheme is used for initial alignment,and high precision alignment is achieved on the basis of ensuring fast alignment.The simulation results show that the alignment scheme can quickly complete the initial alignment and achieve a high alignment accuracy,and the sky misalignment error is within 10″.关键词
捷联惯导/初始对准/正逆向滤波/四位置对准Key words
strapdown inertial navigation/initial alignment/forward and reverse filtering/four-position alignment分类
交通工程引用本文复制引用
乔伟,曾庆化,赵宾,朱小灵..基于正逆向滤波的四位置对准[J].南京航空航天大学学报（英文版）,2023,40(z2):48-53,6.基金项目
The work was supported by the Na-tional Natural Science Foundation of China(Nos.61533008,61603181).The authors would like to thank all the authors,editors and anonymous reviewers for their help and valuable comments. （Nos.61533008,61603181）
