GPS/INS组合导航系统中接收机时钟误差处理研究

针对GPS/INS深组合中接收机时钟误差模型无法精确确定的问题,提出了一种基于时间差分的钟差推算新方法,利用相邻时刻观测量公共误差基本相同的特点,来实时推算接收机的钟差,仿真表明该方法具有较高的推算精度,并且能够消除接收机钟跳特性带来的预测困难。通过GPS/INS深组合导航系统与传统的时钟误差模型进行半物理仿真比较,表明本文提出的方法能有效提高组合系统的健壮性,消除接收机钟跳对滤波器稳定性的影响,并能显著提高系统的精度。

Application Study of Receiver Clock Error in GPS/INS Integrated Navigation System

In order to get rid of the problem to identify the GPS clock error state model in GPS/INS deep integrated system,a new projection method of clock error based on time difference is put forward.Real time projection of receiver clock error is obtained by using the feature of that the public error of the adjacent measurements are basically the same.The simulation shows that this method has high accuracy,and can eliminate prediction difficulty brought by clock jump.Comparing the clock error model of GPS/INS deep...