压电-电磁复合动能采集器无量纲参数建模与分析  

A study on the dimensionless parameter model of a piezoelectric-electromagnetic hybrid vibration energy harvester

作　　者：夏桦康 陈仁文[1] 朱莉娅[2] 任龙[1] 周秦邦 XIA Huakang CHEN Renwen ZHU Liya REN Long ZHOU Qinbang(State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronauticsand Astronautics, Nanjing 210016, China Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing, Nanjing Normal University, Nanjing 210042, China)

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016 [2]南京师范大学江苏省三维打印装备与制造重点实验室,南京210042

出　　处：《振动与冲击》2017年第12期128-133,共6页Journal of Vibration and Shock

基　　金：江苏省普通高校研究生科研创新计划(KYLX15_0247);江苏省高校优势学科建设工程资助项目(PAPD);江苏省高校自然科学研究面上项目(14KJB480004)

摘　　要：针对压电-电磁复合动能采集器的物理参数模型难以提供统一的性能比较标准,以及最大输出功率及最优负载直接求解困难等问题。通过引入无量纲参数建立了采集器的无量纲参数模型,理论推导了归一化输出功率,并采用遗传算法求解了最大输出功率及最优负载;数值分析了无量纲参数对采集器性能的影响,并实验验证了模型和遗传算法求解的正确性。结果表明:(1)减小线圈负载可提升性能;(2)增大机械品质因子将提高频率选择能力;(3)当压电和电磁均为弱耦合作用时,性能受二者共同影响,且在二者匹配时获得最优;(4)当电磁为强耦合作用时,性能基本只受电磁端影响,且随其增强而不断趋近最优;(5)压电-电磁双耦合机制可增大采集器的最优负载范围。In order to establish a unified p e r f o r m a n c e c o m p a r i s o n standard a n d obtain the m a x i m u m output p o w e r and the corresponding optimal loads for a piezoelectric-electromagnetic hybrid vibration energy harvester, a generalized dimensionless parameter model was introduced to address this p r o b l e m. T h e expression of the theoretical normalized output power was derived, and the maximum value a n d the optimal loads w e r e obtained b a s e d o n a genetic algorithm; the relationships between the dimensionless parameters a n d the p e r f o r m a n c e of the harvester w e r e analyzed b y numerical simulations, and the feasibility of the m o d e l a n d genetic algorithm for this topic w e r e verified b y a n e x p e r i m e n t. T h e results show ： （ 1 ） reducing coil resistance c a n i m p r o v e the p e r f o r m a n c e; （2） i m p r o v i n g m e c h a n i c a l quality factor c a n increase the frequency selectivity; （3） the p e r f o r m a n c e is c o - d etermined b y piezoelectric a n d electromagnetic factors w h e n the two effects are weak coupling, and the best p e r f o r m a n c e is obtained at their m a t c h i n g p o int; （4） the p e r f o r m a n c e is almost determined by the electromagnetic factor when it is strong c o u p l i n g, a n d it increases to the ultimate p e r f o r m ance with the electromagnetic effect; ？ the optimal load range is increased b y using the piezoelectric-electromagnetic dual-coupling mechanisms.

关 键 词：能量采集 压电-电磁 无量纲参数模型 遗传算法 

分 类 号：TN384[电子电信—物理电子学] TM619[电气工程—电力系统及自动化]