GPS/INS组合导航系统数据同步处理方法研究  

Data Synchronization Method of GPS/INS Integrated Navigation System

作　　者：肖进丽[1] 潘正风[1] 黄声享[1] 

机构地区：[1]武汉大学测绘学院,武汉市珞喻路129号430079

出　　处：《武汉大学学报（信息科学版）》2008年第7期715-717,743,共4页Geomatics and Information Science of Wuhan University

基　　金：国家交通部西部交通建设科技基金资助项目(200531881203)

摘　　要：论述了GPS/INS组合导航系统中的数据同步问题,提出了一种完全利用软件编程的数据实时同步的方法。实验结果表明,这种方法不需借助硬件电路,能较好地消除由GPS接收机和INS(惯性导航系统)之间数据不同步所引起的误差对组合系统导航精度的影响。The basic problem about the data synchronization is described and a new data syn-chronization method by software technology completely is presented which is easy to be realized. Firstly, the new method maps and unifies two data of measurement of GPS receiver and INS in the same time benchmark. Secondly, the update time difference of asynchronous data is obtained by computing the time difference when they are accepted by the computer and the time at which computer accept the data is gained by using time stamps technology. Thirdly, the interpolation method is used to get hypothesized measurement values of INS at the time when the data from GPS receivers are updated. Finally, the simulation results show that the method is feasible and effective.

关 键 词：GPS/INS 组合导航 卡尔曼滤波 时间戳 插值 

分 类 号：P228.41[天文地球—大地测量学与测量工程] P207[天文地球—测绘科学与技术]