均值检验方法及其在冗余惯性导航系统中的应用

采用了非线性滤波的方法对影响故障检测及分离（FDI）性能的传感器误差进行了补偿，同时提出了故障检测与分离的均值检验方法（MVT）,该方法可以对2个传感器同时出现故障的情况进行检测与隔离。5个陀螺冗余惯性导航系统仿真结果验证了本文算法的有效性。

MEAN VALUE TEST METHOD AND ITS APPLICATION FOR REDUNDANT NAVIGATION SYSTEM

Mean value test (MVT) is proposed to detect and isolate the failure. Non linear filtering is also proposed to estimate the combinations of sensor errors affecting the parity vector, the estimates are used to form a compensated parity vector. The compensated parity vector is used to make FDI decision for improving FDI performance. To illustrate its application, the MVT approach is used to detect and isolate the failure for an optimal mounting configuration of five single degree of freedom sensors. Some results are obtained by comparing MVT method with GLT method. Simulation results prove that MVT method can detect and isolate the failure effectively when two sensors fail simultaneously.