...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Mechanical systems and signal processing >Experimental study of the variations in the electromechanical properties of piezoelectric energy harvesters and their impact on the frequency response function
【24h】

Experimental study of the variations in the electromechanical properties of piezoelectric energy harvesters and their impact on the frequency response function

机译：压电能量采集器的机电性能变化及其对频率响应函数的影响的实验研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This work presents a comprehensive study of the uncertainties involved in the Frequency Response Function (FRF) of Piezoelectric Energy Harvesters (PEHs) based on experimental results. A proper experimental setup is designed facilitating the FRF identification for different PEHs. The test protocol consists in three test that quantify the aleatoric and epistemic uncertainties by the study of repeated measurements, variation in the mounting process, and variations in the electromechanical properties of the materials employed in the harvester. The experimental setup and the test protocol are tested employing two different bimorph-type harvesters identified as Model A and B. 20 harvesters corresponding to Model A and 10 to Model B are tested multiples times under the test protocol proposed. Results clearly indicate that the most important source of uncertainties deals with the variability of the electromechanical properties of the PEH, which is particularly greater than: (i) the noise on the measurements, (ii) the variations introduced by the clamping condition, and (iii) the dimensional variations in the geometry. The results are also compared with predictions performed by adopting a recent numerical framework to propagate uncertainties in PEHs. The present work is particularly important since it presents the experimental evidence of the variations in the electromechanical properties of PEH and their influence on the FRF. Additionally, the results not only validate the uncertainty propagation procedures previously proposed but also suggest that their use is mandatory to estimate the FRF. This work presents, to the best of the authors' knowledge, the first effort to experimentally quantify the uncertainties in PEHs. (C) 2018 Elsevier Ltd. All rights reserved.
机译：这项工作基于实验结果，对压电能量采集器（PEHs）的频率响应函数（FRF）中涉及的不确定性进行了全面研究。设计了适当的实验设置，以促进针对不同PEH的FRF识别。该测试协议包括三个测试，这些测试通过对重复测量，安装过程中的变化以及收割机中所用材料的机电性能的变化进行研究，从而量化了不确定的和认知的不确定性。实验设备和测试规程使用两个不同的双峰型收割机进行了测试，分别称为模型A和B。在建议的测试规程下，对与模型A相对应的20台收割机以及与模型B相对应的10个收割机进行了多次测试。结果清楚地表明，最重要的不确定性来源是PEH机电性能的变化，该变化尤其大于：（i）测量噪声，（ii）钳位条件引起的变化以及（ iii）几何尺寸变化。还将结果与采用最新数值框架来传播PEHs中的不确定性进行的预测进行比较。本工作特别重要，因为它提供了PEH机电性能的变化及其对FRF的影响的实验证据。另外，结果不仅验证了先前提出的不确定性传播程序，而且表明必须使用它们来估计FRF。据作者所知，这项工作是通过实验量化PEHs不确定性的首次尝试。 （C）2018 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号