全球卫星导航姿态测量新方法研究  

A New Attitude Measurement Method for Global Navigation Satellite System

作　　者：李世杰[1] 李治安[1] 庞春雷[1] 

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077

出　　处：《计算机仿真》2015年第11期110-114,共5页Computer Simulation

基　　金：国家自然科学基金资助项目(61273049)

摘　　要：在全球卫星导航姿态测量过程中,由于初始化时间较长,姿态调整性较差,所以提出了一种快速测姿新方法。首先从所有整周模糊度中选取两个作为主模糊度,利用其与基线俯仰角、航向角之间的关系解得对应从模糊度,从而将搜索空间降为二维。同时利用基线长度、伪距精度和加速度计俯仰辅助等多种约束条件进一步限制了主模糊度搜索范围。最后通过列基线残差进行比率检验固定模糊度,并完成姿态解算。试验结果表明,新方法搜索空间小,初始化时间短,能使卫星导航得到高精度的姿态信息。In order to shorten the initialization time of attitude measurement for Global Navigation Satellite System, a new method is studied in the following procedures ： First, two of the ambiguities are selected as the major ambiguity. According to the relationship between ambiguity and baseline heading and elevation, the minor ambiguity is calculated, thus the searching dimensions are reduced to two. And given the baseline length, the pseudo range accu- racy and the elevation information provided by accelerometer, the searching space of major ambiguity is further restricted. Finally, by comparing two-order residuals of baseline, integer ambiguity can be defined and therefore the attitude measurement is completed. The experiment reveals that the new method has smaller searching space, shorter initialization time and higher measurement precision.

关 键 词：全球卫星导航系统 整周模糊度 姿态测量 基线约束 

分 类 号：TN967.1[电子电信—信号与信息处理]