Active noise control of a mechanically linked double panel system coupled with an acoustic enclosure
Active noise control of a mechanically linked double panel system coupled with an acoustic enclosure
复制标题
与隔音罩相结合的机械连接双面板系统的主动噪声控制
DOI：
10.1016/j.jsv.2006.04.010
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Li Cheng
中科院分区：
文献类型：
--
作者：
Y. Y. Li;Li Cheng
本文研究了机械连接双层结构进入隔声室的声传播的主动控制问题。基于完全耦合的振动-声学模型，通过研究(A)利用气隙内声源的空腔控制和(B)在两个面板之间使用结构致动器的结构控制，研究了机械环节对控制策略选择的影响。探讨了传输路径与控制策略之间的关系。数值结果表明，当声传播路径占主导地位时，空腔控制可以为软连杆提供良好的噪声抑制，而结构控制和空腔控制都可以随着连杆刚度的增加而增加，具体取决于感兴趣的频率范围。对于每种情况，研究了主要的控制机制，并分析了结构-声学耦合的变化，以解释衰减的机制。讨论了声学模式(0，0，0)对能量传输主动控制的影响，为选择合适的控制方案以保证最大的控制性能提供了指导。
Active control of sound transmission through a mechanically linked double-wall structure into an acoustic enclosure is investigated in this paper. Based on a fully coupled vibro-acoustic model, the effect of mechanical links on the selection of control strategies is studied by examining (a) cavity control using acoustic sources inside the air gap and (b) structural control using structural actuators between the two panels. The relationship between the transmission path and the control strategies is explored. Numerical results show that cavity control can provide good noise attenuation for soft links when acoustic transmitting path dominates, while either structural or cavity controls can be used with the increase of stiffness of links depending on the frequency range of interest. For each case, the dominant control mechanism is examined and the alteration in the structural–acoustic coupling is analyzed to explain the mechanisms of attenuation. The effect of the acoustic mode (0,0,0) on active control of energy transmission is also discussed, giving guidance to choosing the appropriate control arrangement to ensure the maximum control performance.