摘要
压电振动能量采集器是解决低功耗电子产品无线自供电问题的关键器件,其与非线性接口电路之间的耦合动力学特性是影响采集器转换输出效率的关键因素,需深入研究解决。以非线性三稳态压电振动能量采集器及非线性AC-DC整流滤波接口转换电路为对象,建立非线性耦合动力学模型,基于谐波平衡方法求解系统稳态解及稳定性判别矩阵———雅可比矩阵。仿真分析了激励幅值、频率和耦合系数等参数对系统的影响机理。实验证明了仿真分析结果的正确性。研究结果表明选取适当的参数有利于提高系统的有效带宽和输出功率。在适度范围内增加耦合系数和负载电阻,可以增加系统的有效输出功率和有效频带宽度但过大时会抑制振动幅值和频带宽度,导致能量转换效率降低。
Piezoelectric vibration energy harvester is a key device to solve the problem of sustainable power supply of low-power electronic products.With the nonlinear tri-stable piezoelectric vibration energy harvester and the nonlinear rectifying interface circuit as the object,the nonlinear coupling dynamic model between the harvester and the interface circuit is established.Based on the harmonic balance method,the steady-state solutions of the system dynamic response and the Jacobian matrix used to judge the stabilities of the solutions are obtained.The influence mechanism of excitation amplitude,excitation frequency and coupling coefficient on the system is simulated and analyzed.The results show that appropriate parameters are conducive to improve the effective bandwidth and output power.Increasing the coupling coefficient and load resistance in an appropriate range can increase the output power and frequency bandwidth of the system,beyond which the effective bandwidth and energy efficiency will be greatly compromised.
作者
朱强国
郑友成
周铄
刘周龙
王光庆
张贝奇
ZHU Qiangguo;ZHENG Youcheng;ZHOU Shuo;LIU Zhoulong;WANG Guangqing;ZHANG Beiqi(School of Information and Electronic Engineering(Sussex Artificial Intelligence Institute),Zhejiang Gongshang University,Hangzhou Zhejiang 310018,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2022年第10期1427-1438,共12页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金资助项目(51777192)
浙江省自然科学基金资助项目(LY20E070001)。
关键词
压电振动能量采集
耦合动力学
谐波平衡
标准整流电路
AC电路
piezoelectric energy harvester
coupling dynamics
harmonic balance
standard rectifying circuits
AC circuits
