振动固定板结构体积位移的获取

吴锦武;丁相玉;张加林

振动与冲击 ›› 2010, Vol. 29 ›› Issue (9) : 89-92.

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PDF(1034 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (9) : 89-92.
论文

振动固定板结构体积位移的获取

  • 吴锦武;丁相玉;张加林
作者信息 +

Acquisition volume displacement of the clamped-clamped plate

  • Wu Jinwu; Ding Xiangyu;Zhang Jialin
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文章历史 +

摘要



摘要:在低频时控制振动板结构的体积位移是降低结构总声功率的一种有效策略。本文提出一种阵列式压电式传感器的设计方法测量固定板体积位移。通过对PVDF传感器阵列输出信号设计的加权系数,使PVDF传感器阵列输出信号为相应结构体积位移。结果表明这种阵列式PVDF传感器的加权系数与施加在振动板表面的外激励力性质(如激励力类型、位置等)无关。并且分析了影响阵列式PVDF传感器的各种因素及其适应性。




Abstract

Abstract: Controlling the volume displacement of vibration plate has previously been shown to be a good strategy to reduce its overall sound radiation .With the examples of the clamped-clamped plate, a new piezoelectric sensor design is presented to measure the vibrating volume displacement. An array of rectangular segments of PVDF film attached on the surface of the plate is taken as sensor. The output signals of the PVDF films are multiplied by appropriate weights so that the weighted combinations of the output directly lead to the vibrating volume displacement. It is shown that the array sensors design not only is independent of the external excitation properties such as type, magnitude, position, and etc. but also it can be applied for vibrating plates with arbitrary boundary conditions. In addition, the influencing factors and adaptability of the array sensors are shown.

关键词

关键字: 噪声控制 / 压电传感器 / 体积位移

Key words

Noise control / Piezoelectric sensor / Volume displacement

引用本文

导出引用
吴锦武;丁相玉;张加林. 振动固定板结构体积位移的获取[J]. 振动与冲击, 2010, 29(9): 89-92
Wu Jinwu;Ding Xiangyu;Zhang Jialin. Acquisition volume displacement of the clamped-clamped plate[J]. Journal of Vibration and Shock, 2010, 29(9): 89-92

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