An active control strategy for achieving weak radiator structures
An active control strategy for achieving weak radiator structures
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实现弱散热器结构的主动控制策略
DOI：
10.1115/1.2930393
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
G. Koopmann
中科院分区：
文献类型：
--
作者：
K. Naghshineh;G. Koopmann
基于对结构响应的测量，提出了一种主动抑制结构总辐射声功率的通用控制策略。利用测量的结构响应和结构导纳的知识，在结构的离散点上找到了等效的主激振力。使用该等效主动力并对从结构辐射的功率执行二次优化，在结构上的选定点处找到一组控制力，该控制力导致辐射声功率最小。给出了简支梁在平面简谐波斜入射下受刚性挡板激励的数值算例。
A general control strategy is presented for active suppression of total radiated sound power from harmonically excited structures based on the measurement of their response. Using the measured response of the structure together with knowledge of its structural mobility, an equivalent primary excitation force is found at discrete points along the structure. Using this equivalent primary force and performing a quadratic optimization of the power radiated from the structure, a set of control forces is found at selected points on the structure that results in minimum radiated sound power. A numerical example of this strategy is presented for a simply supported beam in a rigid baffle excited by a harmonic plane wave incident at an oblique angle