一种斑马型压电俘能器的有限元分析  

Finite Element Analysis on Zigzag Transducers

作　　者：吴昊[1] 李开宇[1] 

机构地区：[1]南京航空航天大学自动化学院,江苏南京210016

出　　处：《电子科技》2012年第8期43-45,共3页Electronic Science and Technology

摘　　要：提出了一种新型的俘能结构,其是利用压电效应并应用于微机电(MEMS)领域的设计。通常有效的能量捕获装置包括:悬臂梁类型的金属基层及与之粘结的较薄压电层,从而引起谐振响应。越短的悬臂梁其谐振频率越大,因此在微机电领域中,由于较小的结构使得悬臂梁难以形成共振。文中针对此问题提出了一种可以降低自身谐振频率的新型几何结构。对这种斑马型几何结构,利用Ansys仿真软件求解得出其在微机电领域内也可以接近发生共振。This paper addresses an issue in energy harvesting that has plagued the potential use of harvesting through the piezoelectric effect at the micro-electro-mechanical systems （MEMS） scale. Effective energy harvesting devices typically consist of a cantilever beam substrate coated with a thin layer of piezoceramic material to resonant at the dominant frequency of the ambient vibration. The fundamental natural frequency of a beam increases as its length decreases, so that at the MEMS scale resonance occurs orders of magnitude higher than ambient vibration frequen- cies, rendering the harvester ineffective. Here, we propose a new geometry for MEMS scale cantilever harvesters with low fundamental frequencies. To this zigzag configuration, we proved it can decrease its resonant to ambient by ANSYS.

关 键 词：微机电 悬臂梁 谐振频率 有限元分析 

分 类 号：TM38[电气工程—电机]