基于最小二乘法的GPS故障星辨识新方法研究

A New FI Method for GPS Satellites based on Least Square Method

在最小二乘故障检测的基础上，提出了一种在最小二乘法残差向量ω的似然函数基础上推导出故障卫星辨识的新方法。采用该方法针对GPS卫星中可能出现的突发性故障以及斜坡形软故障进行了仿真实验。结果表明，该故障卫星辨识方法能够准确地辨识出故障卫星并将其实时剔除，星座重构后能够使GPS的定位莰差处于正常的范围内。

On the basis of fault detection （FD） with the Least Square Method, a new method for fault exclusion （FE） based on range residual vector ω is presented. Simulation experiments under the situations of sudden faults and slope faults are performed using this method. The results show that the new method accurately recognizes fault satellites, and the positioning error is in normal range after fault recovery.