局部状态检测的GPS/INS组合导航转发式干扰检验方法

A Test Method for GPS/INS Integrated Navigation Repeater Jamming Based on Partial States Test

针对GPS/INS(Global Positioning System/Inertial Navigation System)组合导航中GPS转发式干扰问题,在分析故障变化特性与故障诊断函数特性之间关系的基础上,提出了一种基于局部状态χ2检验的方法。通过观测值的变化、观测模型的变化和χ2检验中x赞1k的变化论证了方法的可行性,并得出组合导航受到转发式干扰是判断系统发生故障的充分而非必要条件的结论。最后通过在仿真轨迹中加入诱偏来模拟转发式干扰,仿真实验证明该方法能够以较高的灵敏度和较高的准确性判断转发式干扰的发生。

For the problem of GPS/INS Integrated Navigation Repeater Jamming,a method based on partial states chi-square test is presented. This method is based on the relationship between analysis of the characteristics of fault changes and the characteristics of fault diagnosis function. According to Demonstrate the feasibility of the method via changes in the observed value,changes in the observed model,and state value changes in the chi-square test,it is concluded that Repeater Jamming is a unnecessary and sufficient condition for GPS/INS Integrated Navigation’s system fault. At last,by adding cajolery to simulation trajectory to simulate the Repeater Jamming,the simulation results show that this method can judge the occurrence of Repeater Jamming in high sensitivity and high accuracy.