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摘要: 应用压电材料的压电效应, 研究了带有一面柔性墙的三维闭合空间的辐射噪声控制, 集压电材料组成的传感器和致动器与一体, 并把VC++强大的图形界面编程能力与MATLAB丰富的数字信号处理函数资源相结合作为软件设计方法, 用100Hz的单频信号模拟噪声源进行了实验研究, 发现在100Hz处, 闭合空间内的辐射噪声降低约15dB。结果表明利用智能材料进行主动噪声控制是可行的, 在实际中是降低飞机机舱等密闭舱室辐射噪声的有效方法。Abstract: This paper studied of sound radiation control from a flexible panel into a three-dimension closure using piezoelectric smart structure. In this experiment, the closure with a flexible panel was used to simulate the aircraft cabin; piezoelectric actuators and sensors were adhered to the flexible panel; as to signal treatment, this paper used VC++ to make main interface and MATLAB to do background analysis work; the signal of 100 Hz was chosed as noise source.It is pointed out that at 100 Hz, the radiate noise of closure decreases about 15 dB.The result indicates the feasibility of this treatment, and that active noise control will be an efficiency way to control radiate noise of cabins like aircraft's.
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Key words:
- aircraft cabin /
- piezoelectricity /
- active noise control /
- sensor
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