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Galfenol悬臂梁能量采集器的机电耦合动态模型

DOI: 10.13334/j.0258-8013.pcsee.2015.21.028, PP. 5623-5631

Keywords: Galfenol,悬臂梁,振动能量采集器,分布参数,机电耦合

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Abstract:

依据欧拉-伯努利梁结构动力学理论、磁致伸缩材料线性本构方程和法拉第电磁感应定律,建立Galfenol悬臂梁振动能量采集器的分布参数机电耦合动态模型,由该模型推导出器件的频率特性表达式。计算在加速度激励下,器件输出的电压、电流、功率和顶端相对位移,并对器件的机电双向耦合重要动力学特性,如短路和开路行为,进行深入研究。计算结果与实验结果的比较表明,该模型能提供器件在低加速度激励时的合理数据趋势,并能预测器件在多阶模态下的机电双向耦合动态特性。建立的模型对于器件的整体性能预估、设计、控制和使用具有重要的指导作用。

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