基于系统模态的作动器优化配置

Optimal Placement of Actuators in Vibration System Based on Modal Eigenparameter

文章提出一种优化方法,该方法首先利用FEM方法对结构系统进行模态分折,从中提取与振动源相关的主要模态,然后通过对模态特征向量和特征频率进行重组,得到只包含待控模态的系统状态空间方程,再建立系统振动能量最大的优化目标函数,最后通过固定外载荷力对目标函效进行计算得到作动器分布的最佳位置。算例验证结果表明该方法可以结合FEM方法方便地获得作动器的最佳位置。

Firstly, an optimization method is presented, the FEM is used to obtain the eigenvalues and eigenvectors of the vibration system. Secondly, a state space model is constructed only by the selected eigenvalues and eigenvectors. Vibration energy is computed under different distribution of actuators. Finally, the optimal placement determined by optimize objection function. The result shows that the method is feasible and simple to use.