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首页> 外文期刊>Mechatronics, IEEE/ASME Transactions on >Integration of Tapered Beam and Four Direct-Current Circuits for Enhanced Energy Harvesting From Transverse Galloping
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Integration of Tapered Beam and Four Direct-Current Circuits for Enhanced Energy Harvesting From Transverse Galloping

机译：锥形束和四个直流电路的集成，可增强从横向舞动中获取能量的能力

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摘要

To improve the performance of energy harvesting from transverse galloping, structural and circuit designs are integrated. Tapered energy harvesters due to more uniform strain distribution with the standard direct current (dc), synchronous charge extraction (SCE), parallel or series synchronized switch harvesting on inductor (P-SSHI or SSSHI) circuit are adopted. An electromechanically coupled distributed parameter model considering the exact modal shape of the tapered beam attached with the bluff body, is established. The electromechanical coupling coefficient and piezoelectric capacitance are related to the tapered ratio. The proposed model is reduced to the model for the uniform beam via setting the tapered ratio to null. The Hopf bifurcation, beam displacement, and harvested power are generalized to the same expressions for different dc circuits. The modal shapes of the tapered beam and the analytical responses of the harvested power processed through the four the dc circuits, are respectively confirmed via the finite element method, Simulink simulation, and wind tunnel experiment. As the tapered ratio increases, the modified frequencies increase greatly and the tip displacements decrease sharply for all the four circuits. The SCE circuit provides the highest onset speed due to large electrical damping. Additionally, the maximum power of the two SSHI circuits is detected to be the upper boundary of those yielded by the four circuits, and the S-SSHI circuit gives lower displacement. The comparison data show that the harvested power and the energy conversion efficiency can be enhanced by appropriate tapered and circuit designs.
机译：为了提高横向疾驰能量收集的性能，将结构和电路设计集成在一起。采用锥形能量收集器，因为应变分布与标准直流（dc）更均匀，采用同步电荷提取（SCE），在电感器电路上并行或串联同步开关收集（P-SSHI或SSSHI）。建立了考虑了与钝体相连的锥形梁的精确模态形状的机电耦合分布参数模型。机电耦合系数和压电电容与锥度比有关。通过将锥度比设置为零，可以将提出的模型简化为均匀光束的模型。对于不同的直流电路，霍普夫分叉，光束位移和收集的功率被概括为相同的表达式。通过有限元方法，Simulink仿真和风洞实验分别确定了锥形束的模态形状和通过四个直流电路处理的采集功率的分析响应。随着锥度比的增加，所有四个电路的修改频率都大大增加，并且针尖位移急剧减小。由于较大的电阻尼，SCE电路可提供最高的启动速度。此外，检测到两个SSHI电路的最大功率是四个电路产生的功率的上限，并且S-SSHI电路的位移较小。比较数据表明，通过适当的锥形设计和电路设计可以提高收获的功率和能量转换效率。

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