基于降阶模型的结构声耦合系统的极点配置

基于结构声耦合系统的降阶模型实现了水下结构振动和声辐射的极点配置.文中的降阶模型可完全基于结构声耦合系统的振动响应通过实验来获取,可以不需要形成或知道结构的质量阵、阻尼阵、刚度阵和流体的声阻抗矩阵.以水中板结构的振动和声辐射为例使用同位的传感器/作动器布置采用输出反馈控制对流体加载下的板的固有频率和阻尼进行了配置,并对不同的控制构型进行了分析和讨论.数值模拟结果表明基于降阶模型进行水下结构振动和声辐射的极点配置是可行的.

Modal Pole Placement for Coupled Structural Acoustic System Based on Reduced Order Model

The problem of modal pole assignment of a coupled structural acoustic system based on re-duced order model from the forced responses is addressed. The reduced order model might be obtained entirely from measured vibration data, there being no need to determine or to know the structural ma-trices and the acoustic impedance matrix. The modal natural frequencies and damping ratios of the coupled system are assigned separately and simultaneously using output feedback control by collo-cated actuator-sensor arrangements. Different control configurations are discussed and active struc-tural acoustic control is demonstrated numerically using a fluid-loaded plate. The numerical examples show that the chosen eigenvalues may be assigned to predetermined values.