传感技术学报2017，Vol.30Issue(4)：566-569,4.DOI:10.3969/j.issn.1004-1699.2017.04.014
垂线偏差对空中对准航向误差的影响研究
Study on the Influence of the Deflections of the Vertical on the In-Flight Alignment Heading Error
摘要
Abstract
The influence of deflections of the vertical(DOV)on the in-flight alignment heading error is analyzed.Firstly,the reduced order in-flight alignment filtering model is presented,and the mechanism of the DOV influence on in-flight alignment heading error is analyzed.Then,comparative test are carried out by real off-line test data.Finally,the performance of the reduced order in-flight alignment filtering model is evaluated by error covariance analysis simulation.Off-line test and simulation results show that the heading error caused by DOV can reach 0.15°,which is main error source compared to other unmodeled IMU error under the given simulation condition.Employing a high-fidelity gravity field model to compensate the DOV error is necessary to ensure the in-flight alignment heading accuracy in different airspace.关键词
捷联惯导/空中对准/协方差分析/垂线偏差Key words
strapdown inertial navigation/in-flight alignment/covariance analysis/DOV分类
交通工程引用本文复制引用
夏家和,成果达,吉翠萍..垂线偏差对空中对准航向误差的影响研究[J].传感技术学报,2017,30(4):566-569,4.基金项目
国家863高新技术计划项目(2015AA2060) （2015AA2060）
