Dynamics of a cantilever beam with piezoelectric sensor: Experimental study

Q3 Engineering
R. Kolman, J. Kylar, V. Kotek, R. Cimrman, L. Musil
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引用次数: 0

Abstract

: Online and real-time sensing and monitoring of the health state of complex structures, such as aircraft and critical parts of power stations, is an essential part of the research in dynamics. Several types of sensors are used for sensing dynamic responses and monitoring response changes during the operation of critical parts of complex systems. The piezoelectric (PZ) materials belong to one group of electroactive materials, which transform mechanical deformation into an electrical response. For example, PZ ceramics or PVDF foils are employed for online sensing of the time history of mechanical deformation. Experimentally obtained response of a cantilever beam structure with a glued PZ sensor is the case of interest in this contribution. During the transient problem of the beam loaded by suddenly interrupted load due to the weight of a mass at the end of the beam, the time history of normal velocity at a point on the beam surface has been measured by a laser vibrometer and parallely, the output voltage on the PZ sensor has been measured by an electric device. The experimental data in the case of the first eigen-frequency is in good agreement with the value given by the formulae from the theoretical modeling of free vibration of a linear beam.
带有压电传感器的悬臂梁动力学:实验研究
对复杂结构(如飞机和电站的关键部件)的健康状态进行在线和实时传感和监测是动力学研究的重要组成部分。在复杂系统的关键部件运行过程中,有几种类型的传感器用于感知动态响应和监测响应变化。压电(PZ)材料属于一类电活性材料,它将机械变形转化为电响应。例如,PZ陶瓷或PVDF箔用于机械变形时程的在线传感。实验得到的悬臂梁结构与粘接PZ传感器的响应是本贡献感兴趣的情况。在梁端有质量引起的突然中断载荷作用下的瞬态问题中,用激光测振仪测量了梁表面某一点的法向速度时程,同时用电气装置测量了PZ传感器的输出电压。第一本征频率情况下的实验数据与线性梁自由振动理论模型的公式所给出的值吻合较好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Gong Cheng Li Xue/Engineering Mechanics
Gong Cheng Li Xue/Engineering Mechanics Engineering-Mechanical Engineering
CiteScore
2.80
自引率
0.00%
发文量
10549
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