压电能量俘获系统建模及仿真  

Modeling and Simulation of Piezoelectric Energy Harvesting System

作　　者：吴志东 房俊龙[1] 何义波[2] 潘迪 李强 WU Zhi-dong;FANG Jun-long;HE Yi-bo;PAN Di;LI Qiang(College of Electrical and Information, Northeast Agricultural University, Harbin, Heilongjiang 150030,China;School of Mechanical and Electronic Engineering, Qiqihar University, Qiqihar, Heilongjiang 161006, China;College of Science, Qiqihar University, Qiqihar, Heilongjiang 161006, China)

机构地区：[1]东北农业大学电气与信息学院,黑龙江哈尔滨150030 [2]齐齐哈尔大学机电工程学院,黑龙江齐齐哈尔161006 [3]齐齐哈尔大学理学院,黑龙江齐齐哈尔161006

出　　处：《北京理工大学学报》2020年第8期894-900,共7页Transactions of Beijing Institute of Technology

基　　金：黑龙江省省属高等学校基本科研业务费科研项目(135209309);齐齐哈尔大学教育科学研究项目(2017090);齐齐哈尔市科技局工业攻关项目(GYGG201907)。

摘　　要：针对压电悬臂梁结构能量俘获系统进行建模,利用电路系统和机械系统的相似关系,将压电俘能结构模型等效为电路系统模型;为建立压电能量俘获系统完整模型,基于LTC3588-1为核心的能量转换电路等效为降压及整流电路,并利用LTspice软件仿真验证该等效电路的正确性.在Matlab/Simulink系统中搭建压电能量俘获系统整体模型并进行仿真,根据仿真结果对模型参数进行优化.通过对实验数据对比、分析,验证系统模型的合理性,结果表明系统可以稳定输出3.3 V直流电压,最佳阻抗匹配条件下,输出功率为2.6 mW.The energy harvesting system for piezoelectric cantilever beam structure was modeled,the piezoelectric energy harvesting structure model was equated with the circuit system model by using the similar relationship between circuit system and mechanical system.To establish a complete model of piezoelectric energy harvesting system,the energy conversion circuit based on LTC3588-1 was equated with buck and rectifier circuit,the correctness of the equivalent circuit was verified by LTspice simulation.The whole model of piezoelectric energy harvesting system was built and simulated in Matlab/Simulink system,model parameters were optimized according to simulation results.Through the comparison and analysis of experimental data,the rationality of the system model was verified.The system can output 3.3 V DC voltage stably,and the output power is 2.6 mW under the optimal impedance matching condition.

关 键 词：压电能量俘获器 系统建模 等效电路 仿真 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]