摘要
为了提高组合导航的精度,提出了一种伪距/伪距率/双差分载波相位组合导航方法。通过构造双差分载波相位观测量,以消除组合导航中若干误差源,避免整周模糊度的求解。为了避免组合后误差积累发散,引入伪距/伪距率信息,设计了一种新的滤波器。该滤波器能发挥载波相位高精度和伪距/伪距率包含绝对信息的优势。最后利用GPS实测数据和仿真惯性导航数据进行组合导航试验。试验中对比了伪距组合、双差分载波相位组合等常见组合导航方法。两小时试验结果表明,提出的组合导航方法比传统伪距组合方法的平均水平定位精度高61.13%,方法可行。
In order to improve the accuracy of the integrated navigation system,this paper proposes an integrated navigation method based on pseudo-range/pseudo-range rate/dual-differenced carrier phase. By constructing dual-differenced carrier phase observation,some errors in the integrated navigation are eliminated,and the integer ambiguity is avoided. In order to avoid the error accumulation after combination,which could introduce the pseudo-range/pseudo-range rate information,a new filter is designed. The filter takes advantages of the carrier phase＇s high-precision and the superiority of pseudo-range＇s containing absolute information. Finally,an integrated navigation experiment is conducted with the GPS test data and the inertial navigation data from simulation. The pseudo-range combination,dual-differenced carrier phase combination and other common integrated navigation methods are compared in the experiment. The results show that the average level positioning accuracy of the proposed method is 61.13% higher than that of the traditional pseudo-range combination method,showing that the method is feasible.
出处
《中国惯性技术学报》
EI
CSCD
北大核心
2015年第5期602-606,共5页
Journal of Chinese Inertial Technology
基金
国防预研基金项目(4010103010101)
国家自然科学基金项目(61503404)
关键词
组合导航
捷联惯导
双差分载波相位
伪距
伪距率
integration navigation
strap-down inertial navigation
dual-differenced carrier phase
pseudo-range
pseudo-range rate
