改进组合差分定位算法在无人机上的应用  

Application of improved combined differential positioning algorithm to UAV

作　　者：邸健 杨国东[1] 张旭晴[1] DI Jian;YANG Guodong;ZHANG Xuqing(College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China)

机构地区：[1]吉林大学地球探测科学与技术学院,吉林长春130026

出　　处：《测绘工程》2021年第4期44-52,58,共10页Engineering of Surveying and Mapping

基　　金：国家自然科学基金资助项目(40971187)。

摘　　要：无人机航空摄影测量是继GNSS技术普及之后测绘科技的又一进步,为无人机搭配轻型高精度的GNSS差分模块,减少像控点的布设甚至可以直接获取地理位置成为目前的主要发展方向。文中采用U-blox公司的多星座接收模块NEO-M8T组成一套质量轻、低成本的PPK系统,同时将BDS/GPS组合定位算法与改进的LAMBDA模糊度解算方法相结合,提高定位精度和固定解比率,最后与单一GPS定位结果和组合GPS/GLONASS定位结果进行对比分析。实验结果表明,地面静态定位精度达到cm级,机载动态定位固定解的比率及其定位精度大大提高。UAV aerial photogrammetry is another progress of surveying and mapping technology after the popularization of GNSS technology.It has become the main development direction to match UAV with light and high-precision GNSS differential module,by reducing the layout of image control points and even directly obtaining the geographical location.This paper uses NEO-M8T,a multi constellation receiving module of u-blox company,to form a set of PPK system with light weight and low cost.At the same time,the BDS/GPS combined positioning algorithm is combined with the improved lambda ambiguity solution method to improve the positioning accuracy and fixed solution ratio.At last,it compares with single GPS positioning result and combined GPS/GLONASS positioning result.The experimental result shows that the static positioning accuracy of the ground reaches cm level,and the ratio of the fixed solutions and the positioning accuracy of the airborne dynamic positioning are greatly improved.

关 键 词：高精度 BDS/GPS PPK 无人机 精度分析 

分 类 号：P228[天文地球—大地测量学与测量工程]