Study on the bandwidth analysis of a tunable cantilever plate
Study on the bandwidth analysis of a tunable cantilever plate
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DOI：
10.1209/0295-5075/126/50006
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发表时间：
2019-07
期刊：
影响因子：
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通讯作者：
Lihua Chen;Shiqing Pan;Wei Zhang;F. Yang
中科院分区：
文献类型：
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作者：
Lihua Chen;Shiqing Pan;Wei Zhang;F. Yang
能量采集器可以吸收环境振动进行发电，因此迫切需要在能量采集中引入更大的工作带宽。本文设计了一种可调悬臂板结构，在悬臂板的自由边沿x方向沿着各加一个盒子，每个盒子中分别放置一个球。根据挠度曲线给出了可调悬臂板的模态函数。利用汉密尔顿原理推导了系统的动力学方程。根据动力学方程求解了系统的固有频率和带宽。分析了板厚、钢球质量、箱体长度等结构参数对频率和带宽的影响，寻求更宽的带宽，使能量采集器工作在更宽的频率范围内。利用这种可调谐悬臂梁板可以设计出高性能、宽带宽的能量转换器。
Energy harvester can absorb ambient vibration to generate electricity, and it is urgent to introduce a larger working bandwidth in energy harvesting. In this paper, a tunable cantilever plate structure is designed by adding a box at each free edge of the cantilever along the x-direction, and one ball is placed in each box, respectively. The mode function of the tunable cantilever plate is given according to the deflection curve. The Hamilton principle is used to derive the dynamic equation of the system. The natural frequencies and bandwidths are solved according to the dynamic equation. The effects of some structural parameters, such as the thickness of plate, the mass of balls and the length of the box on frequency and bandwidth are analysed to search for a wider bandwidth, which can enable the energy harvester working at a broad range of frequency. A high-performance energy converter with wider bandwidth can be designed according to this tunable cantilever plate.