基于惯导辅助的GPS完好性监测技术

The Research on Autonomous Integrity Monitoring Technique of GPS Based on INS

针对惯导辅助GPS完好性监测,对残差χ2检验法和以大数定律为基础的残差检验法进行了深入的理论分析和比较,并且在斜坡故障方面,引入检测时间和检测函数对判决门限的偏离度作为评估检测性能的两个指标。通过对阶跃故障检测和斜坡故障检测的仿真研究,验证了两种方法的有效性,并且仿真结果表明后者比前者具有一定的优越性。

According to the GPS integrity monitoring based on INS,profound theoretical analysis and comparison were taken for residual chi-square test and the approach failure detection by means of Chebyshev＇s law of great number.Two concepts including detecting time delay and average deflection function which compare to threshold as the capabilitys of Fault Detecting were introduced for slope failure.A simulation study of two methods was done based on detection of step failure and slope failure.The simulation results prove the validity of two methods and the latter has some advantages.