The bandwidth of optimized nonlinear vibration-based energy harvesters
The bandwidth of optimized nonlinear vibration-based energy harvesters
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DOI：
10.1088/0964-1726/23/5/055019
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发表时间：
2014-05-01
影响因子：
4.1
通讯作者：
Inman, D. J.
中科院分区：
文献类型：
--
作者：
Cammarano, A.;Neild, S. A.;Inman, D. J.
为了改善基于振动的能量收集器的性能，许多作者建议可以利用非线性来增加线性装置的带宽。然而，响应对输入激励的复杂依赖性使得对线性收割机和非线性能量收集机的现实比较具有挑战性。在以前的工作中已经证明，对于给定的激励频率，只要对非线性收割机和线性收割机的阻力和线性刚度进行优化，就有可能获得与线性收割机相同的最大功率。这项工作集中在线性和非线性收割机的带宽上，并展示了哪种设备更适合从振动中获取能量。这项工作考虑了不同的激励水平以及不同的激励频率。此外，对于线性和非线性两种情况，还给出了振荡器的机械阻尼对功率带宽的影响。
In an attempt to improve the performance of vibration-based energy harvesters, many authors suggest that nonlinearities can be exploited to increase the bandwidths of linear devices. Nevertheless, the complex dependence of the response upon the input excitation has made a realistic comparison of linear harvesters with nonlinear energy harvesters challenging. In a previous work it has been demonstrated that for a given frequency of excitation, it is possible to achieve the same maximum power for a nonlinear harvester as that for a linear harvester, provided that the resistance and the linear stiffness of both are optimized. This work focuses on the bandwidths of linear and nonlinear harvesters and shows which device is more suitable for harvesting energy from vibrations. The work considers different levels of excitation as well as different frequencies of excitation. In addition, the effect of the mechanical damping of the oscillator on the power bandwidth is shown for both the linear and nonlinear cases.