非线性接口电路对双稳态压电能量收集器性能提升的仿真研究  

Simulation Research on the Performance Improvement of Bistable Piezoelectric Energy Harvester Coupled with Nonlinear Interface Circuit

作　　者：栾浩 刘明康 沈辉[1] LUAN Hao;LIU Mingkang;SHEN Hui(College of Mechanical and Electrical Engineering,Qingdao University,Qingdao 266071,China)

机构地区：[1]青岛大学机电工程学院,山东青岛266071

出　　处：《青岛大学学报（工程技术版）》2024年第1期44-52,共9页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：国家自然科学基金面上资助项目(51975303)。

摘　　要：采用谐波平衡法仿真分析非线性双稳态压电振动能量收集装置(Bistable Energy Harvester,BEH)与双同步开关收集(Double Synchronized Switch Harvesting,DSSH)电路之间的非线性机电耦合情况。研究结果表明,在上扫频激励的条件下,BEH耦合DSSH电路相较于耦合标准接口电路(Standard Energy Harvesting,SEH)的最优输出功率和工作带宽分别提高了391.1%和14.9%;在6 m/s^(2)的定频激励下,BEH耦合DSSH电路比耦合SEH电路的最优输出功率提高了344.8%,且与负载无关。The influence between the mechanical and electrical nonlinearities is complex.In order to explore the influence of nonlinear interface circuit on the nonlinear structure,coupled the nonlinear bistable piezoelectric vibration energy harvesters(BEH)and the double synchronized switch harvesting(DSSH)circuit.The influence of the DSSH circuit on the BEH was simulated and analyzed.Numerical simulations show that the optimal output power and operation bandwidth of the BEH coupled with DSSH circuit are increased by 391.1% and 14.9% under up-sweep excitation,compared to that of the BEH coupled with standard energy harvesting circuit.In addition,under 6 m/s^(2) constant frequency excitation,the optimal output power of the BEH coupled with DSSH circuit is load-independent with an increment of 344.8% compared to the BEH interfaced with standard energy harvesting circuit.

关 键 词：压电振动能量收集 非线性 双同步开关收集电路 双稳态 

分 类 号：TN384[电子电信—物理电子学]