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压电能量俘获系统建模及仿真

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压电能量俘获系统建模及仿真
Modeling and Simulation of Piezoelectric Energy Harvesting System
投稿时间:2019-07-16
DOI:10.15918/j.tbit1001-0645.2019.194
中文关键词:压电能量俘获器系统建模等效电路仿真
English Keywords:piezoelectric energy harvestersystem modelequivalent circuitsimulation
基金项目: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).
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中文摘要:
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.
English Summary:
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.
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