基于异质星座特性的惯性/北斗紧组合滤波算法  

INS/Beidou tightly integrated algorithm based on heterogeneous features of Beidou constellation

作　　者：陈驵[1] 赖际舟[1] 陈磊江 刘建业[1] 柳敏[1] 

机构地区：[1]南京航空航天大学自动化学院,南京210016 [2]陕西宝成航空仪表有限责任公司,宝鸡721006

出　　处：《中国惯性技术学报》2015年第1期71-75,共5页Journal of Chinese Inertial Technology

基　　金：国家自然科学基金项目(61174197);航空科学基金项目(2012ZC52045);中央高校基本科研业务基金(NS2014029);江苏省研究生培养创新工程(KYLX_0284);江苏省"青蓝工程"项目资助

摘　　要：目前我国自主建设的北斗卫星导航系统已形成覆盖亚太地区的导航能力,由于北斗系统特有的中圆轨、倾斜同步高轨和地球静止高轨的异质星座构架与GPS系统存在显著不同,常见的紧组合滤波模型并不能完全适用。针对此问题,通过对北斗不同类型轨道卫星的伪距量测噪声特性进行分析,并将该特性体现在紧组合滤波算法中,对北斗系统的三类卫星的伪距/伪距率信息分别进行状态扩展及量测,以获取更加准确的滤波模型,最后通过仿真实验进行了导航性能的分析与比对。结果表明,针对北斗异质星座特性所设计的分类量测滤波算法可将定位精度提高50%以上,对于后续围绕北斗系统的开发应用具有很强的参考价值。Since China's Beidou satellite navigation system has unique constellation structure which consists of GEO (Geostationary Orbit), MEO (Medium Earth Orbit) and IGSO (Inclined Geosynchronous Satellite Orbit) Satellites, the common tightly integrated algorithm is not completely applicable. To solve this problem, an improved algorithm is proposed based on the analysis of the pseudorange measurement noise model of different orbit types of Beidou satellites. In order to construct a more accurate fusion model, three kinds of Beidou satellites are used to implement states extension and measurement. Simulation results show that the designed algorithm can increase the positioning precision by more than 50%, showing that it can provide great reference for the following development and application of Beidou system. ©, 2015, Editorial Department of Journal of Chinese Inertial Technology. All right reserved.

关 键 词：紧组合 北斗 异质星座 分类测量 

分 类 号：U666.1[交通运输工程—船舶及航道工程]