一种双星定位与捷联惯性的融合方法

捷联惯性导航系统的主要缺点是导航定位误差随时间增长,双星定位系统是一种区域性卫星定位系统,可输出较高精度的水平位置,然而双星定位系统具有位置滞后与用户隐蔽性差的特点,针对其位置滞后现象研究了捷联惯性导航系统与双星定位系统进行组合的滤波方法,提出了其量测噪声的统计模型,同时设计其组合的时机以弥补系统的隐蔽性差的问题。仿真结果表明该滤波方法可行,具有较好的工程应用价值。

One Fusion Method of Double-Star Positioning System and SINS

The main shortcoming of the strap-down inertial navigation system (SINS) is the increasing navigation positioning errors with time. Double-star positioning system is one regional satellite positioning system built up by our country, and can output horizon position information with high accuracy, but the double-star positioning system has the characteristic of output position lag and bad concealment. This paper studies the filtering method for this integration system aiming at the position lag, and puts forward the statistical model of the measurement noise of integration system for the first time, at the same time designs the time of integration in order to compensate for the bad concealment. The simulating results show this filtering method is feasible, which has better value of engineering application.