随机激励下减速带振动能量捕获器的发电性能研究

吴子英; 位强

doi:10.13433/j.cnki.1003-8728.20190309

随机激励下减速带振动能量捕获器的发电性能研究

doi: 10.13433/j.cnki.1003-8728.20190309

吴子英^1,,
位强²

1.
西安理工大学机械与精密仪器工程学院，西安　710048
2.
陕西航空电气有限责任公司，西安　710077

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:
吴子英（1975−），副教授，硕士生导师，研究方向为机电系统动力学理论及控制，ziyingwu@163.com

中图分类号: O322
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- 文章访问数: 196
- HTML全文浏览量: 52
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- 被引次数: 0
出版历程
- 收稿日期: 2019-07-31
- 网络出版日期: 2020-10-12
- 刊出日期: 2020-10-05

Research on Power Generation Performance of Speed Bump Vibration Energy Harvester under Random Excitation

Wu Ziying^1
,,
Wei Qiang²

1.
School of Mechanical and Precision Instrument Engineering, Xi′ an University of Technology, Xi′ an 710048, China
2.
Shaanxi Aviation Electric Co., Ltd., Xi' an 710077, China

摘要

摘要: 本文将双稳态振动能量发电装置引入到减速带结构中，提出了一种双稳态减速带振动能量捕获装置，建立了其力学模型和控制方程。假定车重和车速符合正态分布，利用数值仿真方法，分别针对车重和车速其中一个参数随机变化及车重和车速两个参数同时随机变化这两种情况，研究并分析了车重和车速均值和方差对减速带发电功率的影响规律，研究结果表明，减速带发电系统输出功率随着车重均值和方差的增加而增大。不同车重均值的车辆通过减速带时，减速带发电功率最大值所对应的车速均值不同，最佳车速均值约在20 ~ 25 km/h之间，减速带发电功率随着速度方差的增大而逐渐减小，在较大发电功率下，双稳态发电振子在两个平衡点间产生大幅混沌运动，处于有利于发电的状态.
- 减速带 /
- 振动能量捕获 /
- 双稳态 /
- 正态分布 /
- 发电性能
Abstract: A bistable speed bump vibration energy harvester (BSBVEH) is put forward by combing the bistable vibration energy power generation with the structure of the bump speed. The mechanical models and governing equations of the BSBVEH are established. The mass and speed of the vehicle are considered as random variables that obey the normal distribution. The two types of random excitation of the speed bump are considered in the study, one excitation is that one of the vehicle mass and speed obeys the normal distribution; the other excitation is that each of the vehicle mass and speed obeys the normal distribution. The effect laws of the mean and variance of the vehicle mass and speed on the power generation of the BSBVEH are studied by simulations. The simulation results indicate that the generation powers of the BSBVEH increase with the increasing of the mean and variance of the vehicle mass. When the generation power of the BSBVEH arrives maximum value, the vehicle speeds are different with the different vehicle mass passing the speed bump. The optimal speed is between 20 km/h and 25 km/h. The generation power of the BSBVEH decreases with the increasing of the variance of the vehicle speed. The power generation oscillator of the BSBVEH behaves the large-amplitude motion between the two equilibrium points when the output power of the BSBVEH is bigger.
- speed bump /
- vibration energy harvesting /
- bistable /
- normal distribution /
- power generation

HTML全文

图 1 减速带发电装置结构简图

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图 2 车辆−减速带系统力学模型

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图 3 双稳态振动能量发电装置力学模型及外部电路

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图 4 圆弧形减速带形状示意图

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图 5 4种车型下${\mu _{v}}$对发电量的影响

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图 6 不同${\mu _v}$时系统的相图

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图 7 不同车型下$\sigma _{v}^2$对输出功率的影响

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图 8 不同$\sigma _{v}^2$时系统的相图

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图 9 4种车速下${\mu _{m}}$对均方根功率的影响

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图 10 4种车速下减速带下压速度

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图 11 ${\mu _m} = 5\;400{\kern 1pt} {\kern 1pt} {\rm{kg}}$时，4种车速下发电振子振动响应图

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图 12 不同车速下$\sigma _m^{\rm{2}}$对功率的影响

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图 13 不同$\sigma _{m}^2$时系统的相图

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图 14 发电功率与${\mu _{m}}$和${\mu _v}$的三维关系曲面

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图 15 4种车重均值下发电功率与速度均值关系曲线

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图 16 不同${\mu _v}$时系统的相图

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图 17 发电功率与$\sigma _m^2$和$\sigma _v^2$的三维关系曲面

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图 18 5种车重均值下发电功率与速度方差关系曲线

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表 1 4种车型参数

参数	A	B	C	D
m/kg	50	70	110	130
m_s/kg	950	1350	2000	3670
k_u/(N·m⁻¹)	180000	250000	400000	562667
k_s/(N·m⁻¹)	35000	45000	60000	182000
c_u/(N·s·m⁻¹)	3000	3500	5800	10933
c_s/(N·s·m⁻¹)	1500	1800	3000	6400

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参考文献(18)

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