采用状态参数辨识的惯性导航系统故障检测方法研究

摘要

To improve the testability of INS and decrease the fixing time of INS Fault, this paper proposed maintenance method based on inner states estimate with Kalman filter and evaluating of measure information with two chi-square test. The system state were introduced which were needed in filter. It also proposed a fault-tolerant integrated navigation system with two INS,GPS and log to improve the testabili ty. With a instance of INS maintenance, it is proved that the estimate of the system inner parameter with kalman filter can effectively support the fault diagnosis of INS.%针对惯性导航系统故障维修时间长的问题，提出了采用卡尔曼滤波器估计系统内部状态和参数，采取z。检验法来确定系统量测信息的有效性的方法，给出了滤波器设计需要的系统状态参数。在某型惯性导航系统故障维修中验证了通过采用卡尔曼滤波器对系统内部参数进行估计，可以提高故障诊断的效率。