遗传算法在结构模态参数辨识中的应用

Identification of Modal Parameters of Linear Structures Using Genetic Algorithm

把遗传算法应用于模态参数的辨识中 ,提出一种新的时域模态参数辨识方法。把线性结构系统的频率、阻尼比、幅值和相位的识别问题转化为优化问题 ,然后利用遗传算法的全局优化特性 ,找出全局最优解。数字模拟表明 ,该方法能够高精度地识别幅值、频率、阻尼比和相位。

A new approach to the identification of modal parameters of linear structures in the time domain is proposed in this paper by using the genetic algorithm. First, Change the identification problem to an optimal one. Then, the global optimal solutions for the required parameters, including frequency, damping ratio, amplitude and phase of the structure can be obtained by taking the advantage of the genetic algorithm. Numerical simulation results show that the approach can be used to identify the parameters precisely.