118 ACTIVE POWER FLOW CONTROL OF A PLANAR STRUCTURE : GENERATION OF A QUIET ZONE BY USING CLUSTER FEEDBACK CONTROL(O.S.2 Vibration and Noise Reduction Technology III)

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This paper addresses active power flow control of a distributed-parameter planar structure. Unlike conventional modalbased vibration control, the power flow control falls into the category of active wave control, which has the potential of suppressing all vibration modes at a target structure. From the viewpoint of wave propagation, this paper presents novel power flow control of a distributed-parameter panel employing vibration intensity as a criterion of vibration energy flow. As a result of suppressing vibration intensity, however, two phenomena arise up; one is that structural vibration is completely suppressed, and the other is that standing wave is completely dominant on the panel and hence structural modes are thoroughly excited. To cope with the problem, the relevance between vibration energy and vibration intensity is discussed, whereby a new approach to suppressing the structural vibration is presented. By expanding the concept of this approach and applying cluster feedback control approach, a control method generating a quiet zone on a designated area of the target panel is proposed. Finally, numerical simulation is conducted with a simply supported plate, demonstrating the capability of the active power flow control for generating a quiet zone
一般社団法人日本機械学会の論文
2005-05-31