Modelling the dynamic response of bistable composite plates for piezoelectric energy harvesting
Modelling the dynamic response of bistable composite plates for piezoelectric energy harvesting
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DOI：
10.2514/6.2014-0154
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发表时间：
2014-01
期刊：
影响因子：
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通讯作者：
D. Betts;R. Guyer;P. L. Bas;C. Bowen;D. Inman;H. Kim
中科院分区：
文献类型：
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作者：
D. Betts;R. Guyer;P. L. Bas;C. Bowen;D. Inman;H. Kim
本文介绍了分析建模和实验特性的安排，粘贴压电元件，以执行宽带振动为基础的能量收集环境机械振动的复合板。与传统的谐振系统相比，通过利用由“快速通过”机制驱动的非线性振荡模式，这些MEMS器件具有表现出改进的发电的潜力。通过行为示出导致更高的平均功率输出在更宽的频率带宽比谐振设备。产生这些管理单元通过模式的条件进行了研究，在驱动频率和振幅的振动，揭示了间歇性和连续的管理单元通过模式的出现更高的振幅振荡。发现这些模式将半功率带宽从线性振荡的7Hz（4g峰值加速度为106mW）加宽到高振幅跳变行为的22Hz（10g峰值加速度为244mW）。
This paper presents analytical modelling and experimental characterisation of an arrangement of bistable composite plates with bonded piezoelectric elements to perform broadband vibration-based energy harvesting from ambient mechanical vibrations. These bistable devices have the potential to exhibit improved power generation compared to conventional resonant systems by exploiting nonlinear modes of oscillation driven by a ‘snap-through’ mechanism. Snap-through behaviour is shown to lead to higher average power outputs over a much broader frequency bandwidth than a resonant device. The conditions which yield these snap-through modes are investigated in terms of drive frequency and amplitude of vibration, revealing the emergence of intermittent and continuous snap-through modes for higher amplitude oscillations. These modes are found to widen the half-power bandwidth from 7Hz for linear oscillations (106mW for 4g peak acceleration) to 22Hz for high amplitude snap-through behaviour (244mW for 10g peak acceleration).