论文:2014,Vol:32,Issue(1):131-136
引用本文:
吴枫, 秦永元, 张金亮. 极区内基于雷达辅助的SINS空中对准算法[J]. 西北工业大学
Wu Feng, Qin Yongyuan, Zhang Jinliang. In-Flight Alignment Algorithm for Radar Aided SINS in Polar Regions[J]. Northwestern polytechnical university

极区内基于雷达辅助的SINS空中对准算法
吴枫1,2, 秦永元2, 张金亮2
1. 上海航天控制技术研究所, 上海 200233;
2. 西北工业大学 自动化学院, 陕西 西安 710072
摘要:
针对高纬度地区捷联惯导常规对准算法因纬度升高和经线收敛而失效的问题,提出了一种基于格网导航力学编排的极区雷达辅助空中对准算法。以格林尼治子午线为航向参考,定义了格网导航参考系并给出了其导航力学编排及误差方程,解决了极区内惯导定位定向的问题。将雷达量测信息转换到地球地心固联参考系内,解决了雷达量测与惯导量测不匹配的问题。最后,设计了格网系下雷达辅助捷联惯导的空中对准算法。仿真结果表明:对导航级捷联惯导系统(1 nm/h),水平对准精度可达1’,转弯机动下方位对准精度达到5’,为惯导在极区内的空中对准提供了工程参考。
关键词:    惯性导航系统    卡尔曼滤波    数学模型    雷达    测距    格网导航    空中对准    极区导航   
In-Flight Alignment Algorithm for Radar Aided SINS in Polar Regions
Wu Feng1,2, Qin Yongyuan2, Zhang Jinliang2
1. Shanghai Institute of Spaceflight Control Technology, Shanghai 200233, China;
2. Department of Automatic Control, Northwestern Polytechnical University, Xi'an 710072, China
Abstract:
An in-flight alignment algorithm,based on designed grid mechanization,is proposed for radar aided SINS in polar regions to solve the problem that traditional alignment algorithm can not work due to meridian convergence and latitude hoist. First,a grid reference frame is defined,which takes Greenwich meridian as heading reference. The grid navigation mechanization and the error model are deduced to solve the heading and navigation problem in polar regions. Second,the range information measurements given by the tracking radar is transformed to ECEF frame through a designed formula so as to match with SINS position information. Finally,an in-flight alignment algorithm under the grid mechanization is designed for radar aided SINS,to estimate and calibrate aircraft attitude errors. Simulation results and their analysis show preliminarily that 1'of the level alignment accuracy and 5'of the heading alignment accuracy can be achieved after the turning maneuver. Thus,the proposed algorithm has an important value in practice for SINS alignment in polar regions.
Key words:    algorithms    alignment    calibration    design    errors    efficiency    inertial navigation systems    Kalman filters    mathematical models    radar    range finding    grid navigation    in-flight alignment    polar navigation   
收稿日期: 2013-04-11     修回日期:
DOI:
基金项目: 国家自然科学基金(61273333)资助
通讯作者:     Email:
作者简介: 吴枫(1983-),女,西北工业大学博士研究生,主要从事导航、制导研究。
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