三稳态驰振能量捕获器发电性能研究

谭红波; 刘丽兰; 薛白鸽

doi:10.13433/j.cnki.1003-8728.20190294

三稳态驰振能量捕获器发电性能研究

doi: 10.13433/j.cnki.1003-8728.20190294

西安理工大学机械与精密仪器工程学院，西安　710048

基金项目: 国家自然科学基金项目（11572243）资助

详细信息

作者简介:
谭红波（1995−），硕士研究生，研究方向为机械动力学、轴承故障诊断， 578439369@qq.com

通讯作者:
刘丽兰，副教授，硕士生导师，liulilans@163.com

中图分类号: O322
计量
- 文章访问数: 221
- HTML全文浏览量: 41
- PDF下载量: 16
- 被引次数: 0
出版历程
- 收稿日期: 2019-07-19
- 网络出版日期: 2020-10-12
- 刊出日期: 2020-10-05

Exploring Power Generation Performance of Tristable Galloping Vibration Energy Harvester

Schoolof Mechanical and Instrumental Engineering, Xi' an University of Technology, Xi' an 710048, China

摘要

摘要: 将三稳态振动模式引入到流体驰振能量捕获器中，提出了一种用于流致振动环境下的三稳态压电悬臂梁驰振能量捕获器，建立了其力学模型及动力学方程。利用数值仿真比较了双稳态和三稳态驰振系统的动力学特性和发电性能，证明了在较低流速下三稳态系统更容易发生大幅运动，发电性能更好。进一步研究了三稳态系统参数对驰振能量捕获器发电性能的影响。
- 三稳态 /
- 驰振 /
- 能量捕获 /
- 动力学响应 /
- 发电性能
Abstract: Advances in MEMS technology have greatly reduced the power consumption of asensor, whichcan be self-powered with environmental energy. In this paper, a three-stable vibration mode is introduced into the galloping vibrationenergy trap. A tri-stable cantilever beam piezoelectric vibration energy harvester is proposed. The mechanical model and dynamic equation are established. The bi-stability is studied by numerical simulation. The dynamic characteristics and power generation performance of the static and tri-stable motion-stimulus systems are analyzed. The tri-stable system is more likely to undergo large motion and better power generation performance at lower flow rates. The influence of parameters of the tri-stable system on the power generation performance of the galloping energy trap is further studied.
- tristable /
- galloping /
- energy capture /
- dynamic response /
- power generation performance

HTML全文

图 1 三稳态驰振能量捕获器示意图

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图 2 三稳态驰振能量捕获器力学模型及外部电路

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图 3 无量纲势能函数图对比

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图 4 ${A^*}$随${U_r}$变化响应

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图 5 不同${U_r}$时的相图和瞬时电压图

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图 6 峰值电压

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图 7 平均功率

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图 8 不同$\mu $下的势能函数

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图 9 不同$\mu $下${A^*}$随${U_r}$变化曲线

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图 10 不同$\mu $时系统的相图

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图 11 不同$\mu $下峰值电压随${U_r}$的变化响应

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图 12 不同$\mu $下 P 随${U_r}$的变化响应

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表 1 能量捕获器的仿真参数

参数	数值	参数	数值
有效质量 $M $	$0.52 \;{\rm kg}$	横流尺寸 $D$	$0.05\;{\rm m}$
阻尼比 ${\zeta _m}$	0.003	有效电容 ${C_p}$	187 nF
机电耦合系数 $\theta $	$1.9 \times {10^{ - 4}}\;{\rm N/V}$	${a_1}$	2.5
阻流体长度 $L$	$0.1\;{\rm m}$	${a_3}$	130
水的密度 $\rho $	$1\;000\;{\rm kg/{m^3}}$	$R$	$2.7 \times {10^5}\;\Omega$

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参考文献(23)

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