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工程科学与技术:2022,54(2):205-212
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一种双稳态减速带振动俘能装置发电性能研究
(西安理工大学 机械与精密仪器工程学院, 陕西 西安 710048)
Study on Generation Performance of a Bistable Speed Bump Vibration Energy Harvester
(Mechanical and Precision Instrument Eng., Xi’an Univ. of Technol., Xi’an 710048, China)
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投稿时间:2021-03-18    修订日期:2021-04-19
中文摘要: 本文提出一种双稳态减速带振动能量俘能装置,将屈曲梁和单向离合器引入到减速带中,分析屈曲梁产生双稳态振动的条件;根据非线性恢复力与势能方程,推导出平衡点位置、势阱深度与屈曲梁参数的关系式。建立车辆?减速带振动能量俘能装置力学模型及动力学方程,将该减速带振动俘能装置与单稳态线性俘能装置、无单向离合器的单稳态俘能装置的发电电压进行对比。结果表明:引入双稳态屈曲梁的减速带俘能装置大幅度提高了减速带振动能量的俘能效率,提升了近42%发电量;单向离合器的引入不仅实现了减速带上下两个方向的振动能量俘获,而且保证了发电机轴的单向旋转,提升了近30%发电量。分别选取常见的4种车型和5种减速带类型进行对比,结果表明:车辆越重,减速带振幅与受压激励越大,更有利于减速带振动能量的收集;增大减速带高度有助于增大俘能装置输出的发电量,相反,增大减速带宽度使发电量减小。对比装有两种转动惯量飞轮的俘能装置发电性能发现,装有小转动惯量飞轮的俘能装置输出电压大于装有大转动惯量飞轮的俘能装置输出电压。此外,发电量随着负载阻值的增大呈现先增后减的趋势,1 Ω的负载电阻可使俘能装置产生最大的发电量。当增速比小于40时,系统输出功率随增速比的增加增长较快;当增速比位于40到50时,输出功率增长缓慢。
中文关键词: 减速带  双稳态  单向离合器  车辆  发电性能
Abstract:A bistable speed bump vibration energy harvester is proposed by introducing the buckling beam and the one-way clutch. The occurring condition of bistable vibration of the buckling beam is obtained. The relationships between the equilibrium points and the depth of potential well and the structural parameters of buckling beam are derived from the nonlinear restoring force and potential energy equation.The mechanical model and dynamic equations of the vehicle-speed bump vibration energy harvester are established. Comparing the energy harvester proposed in this paper with linear monostable speed bump vibration energy harvester with/without one-way clutch, it is concluded that the introduction of the buckling beam greatly improves the energy harvesting efficiency of speed bump vibration energy harvester, and the power generation is increased nearly 42%. The introduction of the one-way clutch not only realizes the vibration energy harvesting of the up and down directions vibration energy of the speed bump, but also ensures the one-way rotation of the generator shaft. The power generation is increased by nearly 30%. Four types of common vehicle models and five types of speed bumps are selected for the power generation analysis, and the results show that the bigger the vehicle mass is, the larger the speed bump vibration amplitude and the input excitation are. The increasing in height of speed bump can lead to the increasing of power generation. On the contrary, the increasing in width of speed bump leads to the decrease of the power generation. Comparing the output voltage of speed bump vibration energy harvester with two kinds of flywheels with different moment of inertia, the output voltage of speed bump harvester with small moment of inertia is bigger than that with large moment of inertia.The trend of output voltage changing with load resistance is obtained. The speed bump harvester can output the maximum power with 1 Ω resistance. Finally, the output power of speed bump harvester increases rapidly with the increase of speed increasing ratio in the range of 1 to 40, and increases slowly in the range of 40 to 50.
文章编号:202100234     中图分类号:O322    文献标志码:
基金项目:国家自然科学基金项目(11572243)
作者简介:第一作者:吴子英(1975-),男,副教授,博士.研究方向:机电系统动力学理论及控制.E-mail:ziyingwu@163.com
引用文本:
吴子英,严涵,李永越,赵伟.一种双稳态减速带振动俘能装置发电性能研究[J].工程科学与技术,2022,54(2):205-212.
WU Ziying,YAN Han,LI Yongyue,ZHAO Wei.Study on Generation Performance of a Bistable Speed Bump Vibration Energy Harvester[J].Advanced Engineering Sciences,2022,54(2):205-212.