倾斜异长组合型压电能量采集器设计与仿真
Design and Simulation of a Tilted Asymmetric Composite Piezoelectric-Energy Harvester
王鹏 1蒋子豪 2陈仁文2
作者信息
- 1. 南京航空航天大学 航空航天结构力学及控制全国重点实验室,江苏 南京 210016;新疆铁道职业技术学院,新疆 乌鲁木齐 830011
- 2. 南京航空航天大学 航空航天结构力学及控制全国重点实验室,江苏 南京 210016
- 折叠
摘要
振动是自然界中普遍存在的现象,而压电材料可以将外界振动的机械能转化为电能,为微型机电系统、无线传感网络和嵌入式系统等提供能量,从而使得器件降低对电池能源供应的依赖.为了拓宽压电能量采集器的工作频带并提升其能量采集效率,该文设计了一种倾斜异长组合型压电能量采集器,通过理论分析得出该能量采集器的固有频率以及压电能量采集器的各组模态振型,通过有限元分析证明了理论推导的正确性,验证了在该设计中压电悬臂梁组数对压电能量采集器的影响规律.结果表明,倾斜异长组合型压电能量采集器可以实现多模态下的振动能量采集,提升能量采集效率.
Abstract
Vibration is a ubiquitous phenomenon in nature.Piezoelectric materials can convert the mechanical en-ergy of external vibrations into electrical energy,providing energy for micro-electromechanical systems,wireless sensor networks,embedded systems,etc.,thereby reducing the device's dependence on battery power.To broaden the working bandwidth of the piezoelectric-energy harvester and improve its energy-harvesting efficiency,this study designs a tilted asymmetric composite piezoelectric-energy harvester,and obtains the natural frequency and modal shapes of each group of the harvester through theoretical analysis.Through finite-element analysis,the correctness of the theoretical derivation is proved,and the influence law of the number of piezoelectric cantilever beams on the piezoelectric-energy harvester in this design is verified.The results show that the tilted asymmetric composite piezo-electric-energy harvester can harvest vibration energy under multiple modes and improve the energy-harvesting effi-ciency.
关键词
振动能量采集/有限元/异长组合/多模态Key words
vibration energy harvesting/finite element/asymmetric composite/multimode引用本文复制引用
出版年
2024
NETL
NSTL
万方数据