基于逆系统分析法的多输入-多输出系统动态载荷的优化估计

INVERSE SYSTEM ANALYSIS BASED OPTIMAL ESTIMATION OF DYNAMIC LOADS FOR MULTIPLE_INPUT MULTIPLE_OUTPUT SYSTEM

本文提出了一种多输入 -多输出系统动态载荷的优化估计方法。该方法可以使估计的总体均方误差最小。首先 ,采用逆系统分析方法建立误差估计方程 ;其次 ,利用非因果维纳滤波理论导出了动态载荷的优化估计器。数字仿真结果表明 ,该方法在抑制测量噪声对估计精度的影响方面具有良好的效果。与传统方法估计结果的对比分析表明 ,所提出的方法更为有效和实用。

An optimal method is developed to estimate the dynamic loads for systems subjected to multiple inputs.The method focuses on minimizing the ensemble mean square error of the estimation. The inverse system analysis technique is employed to establish the error estimation equation and by applying the noncausal Wiener fitering theory,the optimal estimator of dynamic loads is derived out.Numerical simulation demonstrates that the method is of good ability in suppressing the influence of measurement noise on estimation accuracy.Meanwhile,the simulating calculation of load estimation by a conventional method is also performed and the comparison of both results shows that the method proposed in the paper is rather effctive and practicable for bynamic load estimation.