通过PVDF阵列设计阶梯梁的模态传感器

钟海彬1,毛崎波2

振动与冲击 ›› 2016, Vol. 35 ›› Issue (9) : 129-134.

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (9) : 129-134.
论文

通过PVDF阵列设计阶梯梁的模态传感器

  • 钟海彬1,毛崎波2
作者信息 +

Design of modal sensor for stepped beam based on PVDF array

  • ZHONG Haibin1,  MAO Qibo2
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文章历史 +

摘要

以两端固支阶梯梁为例,通过高分子压电薄膜(Polyvinylidene fluoride,PVDF)传感器阵列测量其模态坐标。在该阶梯梁表面均匀粘贴一组相同形状的矩形PVDF薄膜,首先通过实验方法直接测得该阶梯梁的曲率模态,然后把曲率模态作为这组PVDF输出信号的加权系数,从而得到所需的模态坐标。实验结果表明,这种传感器设计方法是可行的,并且PVDF阵列式模态传感器具有在不均匀梁结构表面布置方便,能准确、方便的测出实验曲率模态,不受激励力位置影响,滤波效果好等优点。

Abstract

With an example of a clamped-clamped beam containing multiple steps, a new experimental approach is presented to design the modal sensors by using an array of PVDF (Polyvinylidene fluoride) sensors. An array of rectangular segments of PVDF film equally attached on the surface of the beam is taken as sensor. First, an experimental modal analysis method was applied to obtain the curvature mode shapes directly. Then the measured curvature mode shape values are used as corresponding weighting coefficient of the output signals of PVDF films, so that the weighted combinations of the outputs to directly lead to the target modal coordinates. The experimental results show that PVDF array modal sensor have advantages of easier bonding on the surface of the stepped beam ,accurately and conveniently measuring experimental curvature modal, independence of position of the external excitation, good effect of modal filtering, etc.

关键词

PVDF传感器 / 实验模态分析 / 曲率模态 / 模态滤波 / 阶梯梁

Key words

PVDF sensors / Experimental modal analysis / Curvature mode / Modal filtering / Stepped beam

引用本文

导出引用
钟海彬1,毛崎波2. 通过PVDF阵列设计阶梯梁的模态传感器[J]. 振动与冲击, 2016, 35(9): 129-134
ZHONG Haibin1, MAO Qibo2. Design of modal sensor for stepped beam based on PVDF array[J]. Journal of Vibration and Shock, 2016, 35(9): 129-134

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