AR模型在陀螺仪性能故障诊断中的应用研究

对惯导系统上的陀螺仪在无故障和故障下输出的信号进行分析 ,计算出信号的特征量———均值、标准差、协方差 ,并用现代谱分析技术中参数模型功率谱分析的方法 ,建立信号的AR模型、绘出AR模型的功率谱图 ,对陀螺仪输出信号的变化进行了比较和分析 ,从而找出一种作为判断陀螺仪性能故障的依据

Application of AR model on the online diagnosis of gyros

In this paper, the performance of the gyroscope's fault signal of the inertial navigation system is researched. We first analyze the stationary characteristics of the random drift signal of the gyroscope in the common condition,work out the signal eigenvalues (mean, standard deviationand covariance) and build the signal 's AR model and power spectra chart. Then two kinds of fault of the system are analyzed by the same method. Finially, all data have been compared in detail, and a fault's eigenvalue has been found out. The eigenvalue can act as the proof of estimating the gyroscope performance.