同时定位与制图辅助的GPS/DR组合导航

针对全球定位系统在信号失锁条件下与航位推算组合导航的系统误差快速累积问题,提出一种基于压缩扩展卡尔曼滤波的同时定位与制图的辅助的全球定位系统/航位推算组合导航方法。该方法利用同时定位与辅助实现运动平台在全球定位系统信号无效时连续稳定导航,抑制航位推算定位误差的累积,并利用全球定位系统定位结果校正同时定位与辅助制图误差,减小地图的不确定性。设计基于压缩扩展卡尔曼滤波的同时定位与辅助/全球定位系统组合滤波器,实现大尺度环境下同时定位与辅助/全球定位系统的实时解算。真实实验数据计算结果分析表明,相对于同时定位与辅助定位结果,同时定位与辅助的全球定位系统/航位推算组合导航可有效提高系统定位性能,使得制图精度提高10m。

Simultaneous localization and mapping aided GPS/DR integrated navigation

Considering the performance of Global Positioning System (GPS)/Dead Reckoning (DR) integrated system degrading dramatically when GPS signal is outage or blocked, this paper addresses a Compressed Extend Kalman Filter (CEKF)-based Simultaneous Localization and Mapping (SLAM) aided GPS/ DR integrated navigation method. The error of DR system is restrained with SLAM correction when GPS solutions are unavailable. Accordingly, GPS location corrects the error and improves the uncertainty of SLAM mapping when GPS positioning is accessible. A filter of CEKF-based SLAM/GPS integrated is designed to realize the real time implement of SLAM/GPS in a large scale environment. Compared with the SLAM locating with using the real experiment dataset, the SLAM aided GPS/DR integrated method enhances the system performance of positioning as well as the accuracy of SLAM mapping arisen approximate 10m.