Efficient broadband vibration energy harvesting based on tuned non-linearity and energy localization
Efficient broadband vibration energy harvesting based on tuned non-linearity and energy localization
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DOI：
10.1088/1361-665x/abaa95
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发表时间：
2020-10-01
影响因子：
4.1
通讯作者：
Haddar, Mohamed
中科院分区：
文献类型：
--
作者：
Aouali, Kaouthar;Kacem, Najib;Haddar, Mohamed
为了提高电磁振动能量采集器的输出性能，对其进行了非线性和能量局部化的实验研究。该非线性装置由两个运动磁铁组成，磁铁由弹性梁引导，并由排斥磁力耦合而成。通过考虑梁的大位移引入机械非线性，通过误调其中一个运动磁铁的质量来实现能量局部化。通过实验确定了临界负载阻力，以调节非线性程度并使收割机超过其临界幅值。因此，与非线性周期系统的性能相比，仅从受扰振荡器获得的功率和频带宽度而言，器件的性能分别提高了19.4%和116%。
In this letter, non-linearity and energy localization are experimentally tuned in an electromagnetic vibration energy harvester in order to enhance its output performances. The non-linear device consists of two moving magnets guided by elastic beams and coupled by a repulsive magnetic force. The mechanical non-linearity is introduced by considering large displacements of the beams and the energy localization is achieved by mistuning the mass of one of the moving magnets. The critical load resistance is determined experimentally in order to tune the non-linearity level and to drive the harvester beyond its critical amplitude. Consequently, the performances of the device, in terms of harvested power only from the perturbed dof oscillator and frequency bandwidth, are enhanced respectively up to 19.4% and 116% compared to the performances of the non-linear periodic system.