| 满大伟,徐德衡,张红亚,康小方.系统参数对三稳态压电俘能器性能影响分析[J].安徽建筑大学学报,2021,29(): |
| 系统参数对三稳态压电俘能器性能影响分析 |
| Influence of system parameter on the performance of tri-stable piezoelectric energy harvester |
| 投稿时间：2020-12-14 修订日期：2021-05-12 |
| DOI：10.11921/j.issn.2095-8382.20201215002 |
| 中文关键词: 非线性动力学 压电悬臂梁 多尺度法 三稳态特性 参数研究 |
| 英文关键词: nonlinear dynamics piezoelectric cantilever beam multi-scale method tristable characteristics parameter research |
| 基金项目:安徽建筑大学校引进人才(博士)科研启动项目(2020QDZ07) |
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| 中文摘要: |
| 基于Euler-Bernoulli梁假设,通过广义Hamilton变分原理建立了三稳态压电悬臂梁俘能系统的分布参数型力电耦合方程,利用多尺度法得到方程的解析解。重点研究了初始起振位置以及材料参数等对系统动力响应的影响。结果表明：选择合适的初始起振位置可使系统更容易的进入高能轨道,产生大幅阱间运动；通过合理的调节磁铁间距可提高系统的俘能效果。阱间运动的输出功率和最优负载阻抗随着压电常数的增大而增大,随着介电常数的增大而减小；优化系统参数可提高工作频率范围和输出功率。 |
| 英文摘要: |
| Based on the Euler-Bernoulli beam assumption, the electromechanical coupling equation of tri-stable cantilever piezoelectric energy harvesting system is established by using the generalized Hamilton variational principle, the analytical solution of the equation is obtained by using the multi-scale method. This investigation is focused on the effects of initial starting position and material parameters on the dynamic response of the system. The results show that choosing the appropriate initial starting position can make it easier for the system to enter the high-energy orbit and generate large inter-well motion. By adjusting the position of magnets reasonably, the efficiency of energy harvesters will be improved. The output power and the optimal load impedance of the inter-well motion increase along with the increase of piezoelectric constant and decrease along with the increase of dielectric constant. Optimizing system parameters can improve the operating frequency range and output power. |
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