时间序列分析在导弹结构模态识别中的应用

在应用时间序列分析识别导弹的弹体结构模态时,AR模型阶数的选择和ARMA模型系数的求解对识别结果有很大影响,在综合比较各种模型定阶方法的基础上,选择奇异值分解法确定AR模型阶数,并使用总体最小二乘法求解模型系数。利用导弹飞行试验实测数据进行仿真实验,证明应用该方法所确定的模型阶数较为合理,对导弹结构模态参数识别取得了理想的效果。

Application of Time Series Analysis in Missile Modal Identification

AR model order selection and solution of ARMA model coefficients have a significant impact on missile modal identification when time series analysis is applied. Based on the comprehensive comparison of various model order method , this paper applies Singular Value Decomposition method to determine the selected AR model order, and uses the Total Least Squares method to solve the model coefficients. Simula tion using missile flight test measured data proves that the application of the method to determine the model order is more reasonable and achieved the desired results.