Design of active structural acoustic control systems using a nonvolumetric eigenproperty assignment approach
Design of active structural acoustic control systems using a nonvolumetric eigenproperty assignment approach
复制标题
使用非体积特征属性分配方法设计主动结构声控制系统
DOI：
10.1121/1.418139
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发表时间：
1997
影响因子：
2.4
通讯作者：
R. Burdisso
中科院分区：
文献类型：
--
作者：
Zhonglin Li;C. Guigou;C. Fuller;R. Burdisso
平面辐射器（如梁和板）的声辐射已知与低频下结构表面上的速度分布直接相关。例如，对于小k0a，非体积模式对应于较差的声音辐射器。在这项工作中，实现显着的声音衰减在低频范围内，SISO特征配置技术被用来修改的特征属性的平面结构，使用结构致动器和传感器，使所有的模式的控制结构是非体积。这种方法的主要优点是设计与干扰特性无关（即，类型、位置和频率内容），并且在辐射场中不需要传感器。提出了在模态域中设计控制系统的方法。该公式被应用到一个简单的支持梁与SISO前馈控制。辐射效率，远场声辐射功率和均方表面速度进行了广泛的研究。...
Sound radiation of planar radiators such as beams and plates is known to be directly related to the velocity distribution over the structural surface at low frequencies. For example, nonvolumetric modes correspond to poor sound radiators for small k0a. In this work, to achieve significant sound attenuation in the low-frequency range, the SISO eigenassignment technique is used to modify the eigenproperties of a planar structure using structural actuators and sensors so that all the modes of the controlled structure are nonvolumetric. The main advantage of such an approach is that the design is independent of the disturbance characteristics (i.e., type, position, and frequency content) and does not require sensors in the radiation field. The design procedure for the control system in the modal domain is presented. The formulation is applied to a simply supported beam with SISO feedforward control. Radiation efficiency, far-field sound radiated power and mean-square surface velocity are extensively studied. ...