Band-Pass Design Optimization of Piezoelectric Cantilever Bimorph Energy Harvester

被引:0
作者
Zhang, Long [1 ]
Williams, Keith A. [1 ]
机构
[1] Univ Alabama, Dept Mech Engn, Tuscaloosa, AL 35487 USA
来源
ACTIVE AND PASSIVE SMART STRUCTURES AND INTEGRATED SYSTEMS 2011 | 2011年 / 7977卷
关键词
Piezoelectric Energy harvester; Finite Element Analysis; Band-pass Design Optimization; FILTERS;
D O I
10.1117/12.895381
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Piezoelectric energy harvesting has become a feasible method for powering micro portable electronics and wireless sensor networks by converting ambient vibration energy into electrical energy. As a thumb of rule, it is critical to tune the resonant frequency of the generator to the frequency of the environmental vibrations in order to induce the maximum structural deformation and then the maximum converted electrical energy through piezoelectric effect. However, it is well-known that the ambient vibrations are not usually fixed in only one single frequency and could span over a limited frequency band. In this paper, a band-pass design optimization of piezoelectric cantilever bimorph (PCB) energy harvester is presented based on the system transfer function of the PCB generator presented in a previous literature. For such an energy harvester, a group of PCB with dimensions appropriately selected can be integrated into a band-pass energy harvester working over a limited frequency band if the dimensions of piezoelectric bimorphs and proof masses are appropriately chosen. Further, the finite element analysis (FEA) of such a band-pass energy harvester is performed in ANSYS to validate the theoretical proposal. The result shows that the band-pass design optimization leads to a piezoelectric generator working over a certain frequency band while keeping outputting the relatively stable open-circuit voltage.
引用
收藏
页数:13
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