摘要
为提高压电振动能量收集器在多种能量环境下的工作效率,旨在研究一种基础激励和风流体混合激励下压电振动能量收集器的机电响应性能。根据Euler-Bernoulli弹性梁振动理论建立了混合激励下压电悬臂梁的分布参数模型,通过建立机电耦合降阶模型得到了系统的第一阶模态机电控制方程,利用机电解耦方法推导了系统响应的解析解,讨论了负载电阻、风速对系统固有频率及机电阻尼的影响,分析了负载电阻、加速度及风速对系统发电性能的影响,验证了理论模型的正确性。结果表明,与基础激励相比,混合激励不但增大系统的能量收集功率,而且可在更宽的频带区间内收集能量。
To improve the working efficiency of piezoelectric vibration energy harvester under various energy environments,the response and performance of piezoelectric vibration energy harvester under hybrid excitations of basic excitation and galloping were studied.According to the Euler-Bernoulli elastic beam vibration theory,the distributed parameter model of piezoelectric cantilever beam under hybrid excitations was established.By establishing the electromechanical coupling reduced order model,the system electromechanical control equation of the first mode was obtained,and the analytical solution of the system response was derived by electromechanical decoupling method.The coupling relationship between the two kinds of hybrid excitations was established.The effects of load resistance and wind speeds on the system natural frequency and electromechanical damping were discussed.And the effects of load resistance,acceleration and wind speeds on the power generation performance were analyzed.The correctness of the theoretical model was verified.The results show that compared with the basic excitation,the hybrid excitation not only increases the system energy collection power but also broadens the frequency band.
作者
高铭阳
刘文光
陈红霞
冯逸亭
鹿青山
GAO Mingyang;LIU Wenguang;CHEN Hongxia;FENG Yiting;LU Qingshan(School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2023年第10期58-66,共9页
Journal of Vibration and Shock
基金
国家自然科学基金(51965042)
江西省研究生创新基金(YC2020-S516)。
关键词
压电能量收集
混合激励
机电响应分析
驰振
piezoelectric energy harvesting
hybrid excitation
electromechanical response analysis
galloping
