基于磁流变弹性体-压电片混合梁结构的宽频振动能量回收装置
PDF下载 (18715)孙帅帅,Tanju Yildirim,李卫华 *.基于磁流变弹性体-压电片混合梁结构的宽频振动能量回收装置[J].宁波大学学报(理工版),2018,31(4):1-10.DOI:
SUN Shuai-shuai,Tanju YILDIRIM,LI Wei-hua *.A broadband vibration energy harvester with a soft magnetorheological elastomer-piezoelectric hybrid beam[J].Journal of Ningbo University(Natural Science & Engineering Edition),2018,31(4):1-10.DOI:
| Title: | A broadband vibration energy harvester with a soft magnetorheological elastomer-piezoelectric hybrid beam |
| 作者: | 孙帅帅, Tanju Yildirim, 李卫华 * |
| Author(s): | SUN Shuai-shuai, Tanju YILDIRIM, LI Wei-hua * |
| 关键词: | 软体混合能量回收装置; 磁流变弹性体; 压电; 振动; 非线性 |
| Keywords: | soft hybrid energy harvester; magnetorheological elastomer; piezoelectric; vibration; nonlinearity |
| 分类号: | TM621 |
| 文献标识码: | A |
| 摘要: | 振动能量回收装置能够将环境动能转化为电能, 然而其工作频率范围窄、产生的功率小是这个领域的突出问题. 为了增加其工作频率范围, 科研工作者已经开发研究了许多技术方案, 例如采用多种振动模式、谐振调谐和非线性技术来拓宽其有效频率范围. 本文提出了一种新型混合非线性振动能量回收装置, 主要包括磁流变弹性体(MRE)层、压电片和末端质量. 新提出的能量回收装置利用MRE的刚度可控特性来开发非线性能量回收装置. 多层MRE压电梁结构由永磁体包围, 以在MRE梁周围形成封闭磁场, 从而产生非线性刚度. 柔性磁流变弹性体-压电混合梁的高度柔韧性使得其与等厚度的铝基能量回收装置相比具有更大的振幅, 从而收集更多的能量. 同时, 对这一新型能量回收装置进行了实验和理论研究以分析其综合性能, 包括其有效工作频率范围和发电功率. 此外, 作为比较, 测试了一种线性能量采集器的各项性能. 线性能量采集器与混合能量采集器之间的比较表明, 本文所提出的混合非线性能量采集器具有更宽的有效频率范围, 并且能够回收更多的能量. |
| Abstract: | Vibration energy harvesters have the ability to convert ambient kinetic energy into electrical energy; however, the problem of narrow bandwidth and small power generated is a prominent issue in this field. To achieve a broad frequency bandwidth, many techniques have been proposed and investigated, such as, multimodal, resonance tuning and non-linear techniques. This paper presents an innovative hybrid nonlinear vibration energy harvester consisting of a magnetorheological elastomer (MRE) layer, piezoelectric sheet and a tip mass. The newly proposed energy harvester makes use of the stiffness controllable characteristics of MRE to develop a nonlinear energy harvester. The multi-layered MRE- piezoelectric beam is enclosed by permanent magnets to close the magnetic circuit around the MRE and induce a nonlinear stiffness. The high flexibility of the soft magnetorheological elastomer-piezoelectric hybrid beam enables the energy harvester to have higher vibration amplitude compared to an equal thickness aluminium based harvester. Experimental and theoretical investigations have been performed to analyse the performance of the hybrid energy harvester, in particular, the effective bandwidth and generated power. Additionally, a linear energy harvester has been tested for comparison; furthermore, comparisons between the linear energy harvester and the hybrid energy harvester demonstrated that the hybrid nonlinear energy harvester has a wider effective frequency bandwidth and generates more power. |
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| 备注/Memo: | 收稿日期: 2018－05－07. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/基金项目: 澳大利亚ARC Discovery Grant（150102636）.第一作者: 孙帅帅（1989－）, 男, 安徽宿州人, 博士/研究员, 主要研究方向: 磁流变技术及其新型工程应用. E-mail: ssun@uow.edu.au*通信作者: 李卫华（1969－）, 男, 江苏丰县人, 博导/教授, 主要研究方向: 智能材料和结构、振动控制、自传感. E-mail: weihuali@uow.edu.au 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
