| 压电-电磁复合式俘能器的归一化机电耦合模型与分析 |
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| 引用本文： | 李平,高世桥,刘海鹏,牛少华. 压电-电磁复合式俘能器的归一化机电耦合模型与分析[J]. 北京理工大学学报, 2013, 33(Z2): 31-34 |
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| 作者姓名： | 李平 高世桥 刘海鹏 牛少华 |
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| 作者单位： | 北京理工大学 爆炸科学与技术国家重点实验室, 北京 100081;北京理工大学 爆炸科学与技术国家重点实验室, 北京 100081;北京理工大学 爆炸科学与技术国家重点实验室, 北京 100081;北京理工大学 爆炸科学与技术国家重点实验室, 北京 100081 |
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| 基金项目： | 国家“八六三”计划项目（SS2013AA041104） |
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| 摘 要： | 针对设计的压电-电磁复合式俘能器，建立其归一化机电耦合模型，利用数值计算和实验测试分析在不同耦合强度下俘能器的振动特性和输出功率. 研究结果表明，在谐振频率点处，当负载匹配时，俘能器的输出功率最大；随着耦合强度增大，俘能器的输出功率、俘能带宽、谐振频率点偏移值也增大. 对于弱耦合和强耦合，复合式俘能器的输出功率大于基于单一俘能机理的压电式或电磁式俘能器的输出功率. 此外，复合式俘能器的最佳负载电阻与耦合效应的强度有关.
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| 关 键 词： | 振动俘能器 压电-电磁 耦合 归一化 |
| 收稿时间： | 2013-11-15 |
Dimensionless Model of Electromechanical Coupling for Hybrid Piezoelectric and Electromagnetic Energy Harvester |
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| LI Ping,GAO Shi-qiao,LIU Hai-peng and NIU Shao-hua. Dimensionless Model of Electromechanical Coupling for Hybrid Piezoelectric and Electromagnetic Energy Harvester[J]. Journal of Beijing Institute of Technology(Natural Science Edition), 2013, 33(Z2): 31-34 |
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| Authors: | LI Ping GAO Shi-qiao LIU Hai-peng NIU Shao-hua |
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| Affiliation: | State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | In this paper, the influence of electromechanical coupling effect on performances of hybrid piezoelectric(PE) and electromagnetic(EM) energy harvester was investigated. The accurate expressions of output power and amplitude were derived. Then, the performances of harvester were studied and compared at the different coupling effects. The results show that the bigger coupling coefficient, the greater resonant frequency shift and output power; both in the situation of weak coupling and strong coupling, the performances of hybrid energy harvester are better than those of only PE or EM energy harvester. In addition, the optimal load resistance of hybrid energy harvester is related to the strength of coupling effect. |
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| Keywords: | energy harvester piezoelectric-electromagnetic coupling effect dimensionless |
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