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Modeling and analysis of distributed electromagnetic oscillators for broadband vibration attenuation and concurrent energy harvesting

机译：分布式电磁振荡器的建模和分析，用于宽带振动衰减和同时的能量收集

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摘要

Many energy harvesting devices employ dynamics ascribed to the classical vibration absorber. Conventional models suggest that when host structural motion excites the harvesters at resonance, maximum electrical power output is achieved. As the harvesters become inertially substantial relative to the structure, this condition no longer holds since the electro-elastic response of the harvester is coupled to the structural vibration. In this regime, the devices become true vibration absorbers that alter the structural oscillations which may consequently affect energy harvesting capability. Distributions of point oscillators have been considered as broadband vibration control treatments making it natural to consider the potential for energy harvesting devices to serve this end. This paper presents an analysis of distributed single- and two-degree-of-freedom, linear electromagnetic oscillators attached to a harmonically excited panel. The coupled Euler-Lagrange equations of motion are solved and the simultaneous goals of vibration attenuation of the host panel and harvested electrical power are computed for several scenarios. It is found that design parameters optimizing the individual goals occur in relative proximity such that small compromises need to be made in order to achieve both ends reasonably well, particularly in regards to the overall mass added to the structure.
机译：许多能量收集装置采用了经典减振器所具有的动力学特性。传统模型表明，当主体结构运动使收割机产生共振时，可获得最大的电力输出。随着收割机相对于结构惯性变得重要，这种情况不再成立，因为收割机的电弹性响应与结构振动相关。在这种情况下，设备成为真正的减震器，可以改变结构的振动，从而可能影响能量收集的能力。点振荡器的分布已被认为是宽带振动控制处理方法，因此自然而然地考虑了能量收集设备的潜在用途。本文介绍了附加到谐波激励面板上的分布式单自由度和两自由度线性电磁振荡器的分析。解决了耦合的Euler-Lagrange运动方程，并针对几种情况计算了主机板的振动衰减和所收集的电能的同时目标。已经发现，优化各个目标的设计参数相对接近地出现，使得需要做出一些小妥协以便合理地实现两端，特别是在增加到结构的总质量方面。

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