罗兰C辅助北斗双星对同温层气球的定位研究  

The Research of Stratospheric Balloon Positioning by the Loran-C Augmented Beidou System

作　　者：段方[1] 刘建业[1] 林雪原[1] 

机构地区：[1]南京航空航天大学导航研究中心,江苏南京210016

出　　处：《应用科学学报》2005年第1期1-5,共5页Journal of Applied Sciences

摘　　要：提出由罗兰C辅助北斗双星对同温层气球进行定位的方法.给出了系统的工作原理,及逐步搜索两曲线间距离最短点定位算法.用Matlab软件对该算法进行了仿真,作了实时性、定位误差分析.结果表明,该算法具有较强的实时性,定位精度对于罗兰C测量误差较为敏感,对双星测量误差相对不敏感.并指出当罗兰C测量误差与北斗双星测量误差同时增大时,定位误差反而有可能与罗兰C误差单独作用时持平甚至减少.定位精度与罗兰C台链的选择、各台之间的几何位置也有关系.该算法也适用于其他空中 地面 海上低动态航行体的定位.A stratospheric balloon positioning method using the Loran-C augmented Beidou system is proposed. The systems working principle is elucidated and the positioning algorithm of searching for the shortest distance between two curves is given. The algorithm was simulated using Matlab software, and (it's) real-time performance and position error are analyzed. The result shows that the algorithm has good real-time performance　and that positioning precision is more sensitive to Loran-C measurement error than to double-star measurement error. It is found that when the Loran-C error and double-star error grow simultaneously, the position error may be equivalent to or even smaller than the error caused only by Loran-C error alone. The positioning precision has a relationship with the choosing of Loran-C chain. The algorithm is also suitable for the positioning of other air/ground/sea vehicle.

关 键 词：同温层气球 定位 罗兰C导航系统 北斗双星 测量误差 

分 类 号：V273[航空宇航科学与技术—飞行器设计]