INS/CNS/GNSS机载高性能空中对准技术研究  

Research on High-performance in-flight Alignment Technology of Airborne INS/CNS/GNSS System

作　　者：陈善秋[1,2] 武庆雅 吴禹彤 张丽玲 夏宇强 龙腾宇 CHEN Shan-qiu;WU Qing-ya;WU Yu-tong;ZHANG Li-ling;XIA Yu-qiang;LONG Teng-yu(College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073;Beijing Aerospace Times Laser Inertial Technology Company,Ltd.,Beijing 100094)

机构地区：[1]国防科技大学空天科学学院,长沙410073 [2]北京航天时代激光导航技术有限责任公司,北京100094

出　　处：《导航与控制》2021年第6期28-35,59,共9页Navigation and Control

基　　金：装备预研领域基金(编号:61405170308)。

摘　　要：为提升机载惯导空中对准精度、缩短对准时间,提出了一种基于广义序贯滤波的卫星天文辅助高性能空中对准方法。广义序贯滤波用来解决因卫星导航系统与天文导航系统输出频率不同带来的异步信息融合问题,同时增强了算法可重构性,在天文信息不可用时依然可利用卫星信息完成对准。整个对准过程分为两个阶段:一是卫星辅助大失准角修正阶段,用时90s;二是卫星天文辅助精对准阶段,用时30s。在真实飞行轨迹条件下对该算法进行了验证,结果表明:对准时间可缩短为2min,同时航向角对准精度可提升到0.004°,所提空中对准方法在很大程度上提升了武器装备的快速反应能力和精确打击能力,具有一定的工程意义。In order to improve in-flight alignment precision and reduce in-flight alignment time of the airborne inertial navigation system(INS),a high-performance global navigation satellite system(GNSS)and celestial navigation system(CNS)aided high precision in-flight alignment method based on generalized sequential filter is proposed.Due to different output frequencies between the two systems,the generalized sequential filter method is introduced to settle the asynchronous information fusion problem.Meanwhile,the applicability of the algorithm is enhanced.When the CNS is not available,the system could still accomplish alignment by GNSS.The alignment process could be divided into two stages.The first is the GNSS-aided large misalignment angle correction stage,which takes 90 s.The second is the precisely alignment stage aided by GNSS and CNS,which takes 30 s.The algorithm is verified under real flight trajectory conditions.Simulation results show that the alignment time is shortened to 2 min and the course angle alignment accuracy has been raised to 0.004°.The proposed in-flight alignment method can increase the quick reaction capability and precision strike capability of the weapons to a great extent,so it has certain engineering significance.

关 键 词：机载惯导 空中对准 广义序贯滤波 天文导航系统 

分 类 号：TP273.2[自动化与计算机技术—检测技术与自动化装置]