Exploiting the principle parametric resonance of an electric oscillator for vibratory energy harvesting
Exploiting the principle parametric resonance of an electric oscillator for vibratory energy harvesting
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DOI：
10.1063/1.4977835
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发表时间：
2017-02-27
影响因子：
4
通讯作者：
Daqaq, M. F.
中科院分区：
文献类型：
--
作者：
Caldwell, N. B.;Daqaq, M. F.
振动能量收集器通常利用普通的直接共振来机械放大环境输入，然后使用机电转换机制将其部分能量导入电力负载。尽管如此，与直接激励相比，最近也被开发的参数共振具有一个关键的优势，即当输入激励水平超过某个阈值时，与参数泵浦相关的增长幅度不受系统中存在的总线性阻尼的限制。虽然以前所有使用参数共振进行能量采集的研究都集中在将其作为一种机械放大手段，但这封信证明，振动激励也可以有效地在采集电路本身中诱导参数共振，从而提供一种直接和简单的电子放大方法。这封信提出了一种利用这种现象的振动能量收集器，每1克输入加速度最大产生18 mW的均方根功率。由AIP出版公司出版。
Vibratory energy harvesters typically exploit ordinary direct resonances to mechanically amplify environmental inputs before channeling a portion of their energy into an electric load using an electromechanical transduction mechanism. Nonetheless, parametric resonance which has also been recently exploited, but to a lesser extent, holds a key advantage over direct excitations in that, when the level of input excitation exceeds a certain threshold, the amplitude of growth associated with parametric pumping is not limited by the total linear damping present in the system. While all of the previous research studies using parametric resonances for energy harvesting focused on utilizing it as a means of mechanical amplification, this letter demonstrates that vibratory excitations can also be used effectively to induce parametric resonances in the harvesting circuit itself, thereby providing a direct and simple means of electric amplification. A vibratory energy harvester exploiting this phenomenon is proposed in this letter and is shown to produce a maximum of 18 mW root-mean-square power per 1 g of input acceleration. Published by AIP Publishing.