改进的状态χ~2故障检验方法及其应用  

A New χ~2 Fault Detection Method and Its Application

作　　者：李春科[1] 

机构地区：[1]西北工业大学航天学院,陕西西安710072

出　　处：《飞行力学》2008年第4期93-96,共4页Flight Dynamics

摘　　要：针对单状态递推器存在误差时间累积的缺点,在SINS/GPS组合导航系统传感器故障检测过程中,基于状态χ2检验方法提出了以速度误差作为更新依据的状态递推器更新判断准则,并与双状态χ2检验方法进行了比较验证。仿真结果表明,该方法大大减少了状态递推器受故障污染的几率,同时有效提高了故障检测的灵敏度。In this paper, state X^2 test was used in fault detection for the SINS/GPS integrated navigation system. Because of the shortcomings evoked by time, a new principle for the state propagator was presented based on velocity error and compared with double state X^2 test, This method reduced the polluted frequency of the state propagator greatly and enhanced sensibility of fault detection. The validity of the method was performed through some simulations.

关 键 词：状态X^2检验 故障检测 组合导航系统 

分 类 号：V249.3[航空宇航科学与技术—飞行器设计]