摘要
针对卫导受限场景中,导航系统精度难以满足要求的问题,提出一种惯导/数据链/卫导紧组合算法,该算法采用卫导接收机和数据链定位解算之前的伪距信息和无线测距信息与惯导信息融合对惯导误差进行修正,只要存在卫导可见星或者数据链源节点即可进行信息融合,最大程度上利用场景中的导航观测量,改善了导航信息品质。试验结果表明,在数据链通信良好的情况下,增加有限的卫导观测量能够改善导航系统精度;在数据链弱联通的情况下,通过有限卫导观测量的引入使得导航系统能够持续输出高精度的导航信息。
In order to meet the accuracy requirements of navigation systems under GNSS restricted conditions,an inertial navigation system(INS)/data link(DL)/Global Navigation Satellite System(GNSS)tightly coupled integrated algorithm is proposed.This algorithm corrects the INS error by fusing the pseudo range information of GNSS receiver and wireless ranging information of DL positioning with INS information.As long as there are GNSS visible satellites or DL source nodes,information fusion can be carried out,maximizing the use of navigation observations in the scene and improving the quality of navigation information.The experimental results indicated that adding limited satellite observation measurements could improve the accuracy of the navigation system under good data link communication.In the case of weak data link connectivity,the introduction of limited satellite observation measurements enabled the navigation system to continuously output high-precision navigation information.
作者
傅金琳
王毅
阎磊
FU Jinlin;WANG Yi;YAN Lei(Tianjin Navigation Instruments Research Institute,Tianjin 300131,China;Laboratory of Science and Technology on Marine Navigation and Control CSSC,Tianjin 300131,China;School of Electronic Information Engineering,Tianjin Vocational Institute,Tianjin 300410,China)
出处
《舰船科学技术》
北大核心
2024年第13期141-145,共5页
Ship Science and Technology
基金
中船集团预研项目(626010306)。
关键词
卫导受限
数据链
紧组合
弱联通
GNSS restricted conditions
data link
tightly coupled integrated algorithm
weak connectivity
