郑州大学学报（工学版）2025，Vol.46Issue(3)：111-117,7.DOI:10.13705/j.issn.1671-6833.2024.06.013
一种压电换能器的动态阻抗匹配方法与频率跟踪
A Dynamic Impedance Matching Method and Frequency Tracking of Piezoelectric Transducers
摘要
Abstract
Dynamic impedance matching technology can improve the output power and energy conversion efficiency of piezoelectric transducers.Most of the existing dynamic impedance matching method was intelligent numerical op-timization algorithm,but the intelligent algorithm had some problems,such as complex modeling,long iteration time and large amount of calculation.In order to solve these problems,a dynamic impedance matching method based on data fitting was proposed,and the corresponding T-shaped impedance matching network was designed.The proposed method obtained the observed values of the resistance and reactance components of the transducer at the corresponding frequency by fine-tuning the operating frequency,and obtained a set of equivalent circuit parame-ters of the transducer with the highest degree of fitting based on the minimum residual sum of squares.Combined with the relevant formulas,the matching network element parameters and the series resonant frequency of the trans-ducer were calculated.The frequency tracking function was further implemented.The dynamic impedance matching method was simulated in Python,and the simulation circuit was built in MATLAB/Simulink to simulate the effect of impedance matching and frequency tracking.The results showed that the proposed method could accurately obtain the equivalent circuit parameters of the transducer,the voltage and current signals at both ends of the matching T-type impedance matching network were basically in phase,the active power was significantly improved,the matc-hing effect was good,and the matching speed was also significantly improved compared with the genetic algorithm.关键词
压电换能器/T型匹配网络/动态阻抗匹配/频率追踪/数据拟合/最小二乘法Key words
piezoelectric transducer/T-mode matched network/dynamic impedance matching/frequency tracking/data fitting/the least squares method分类
通用工业技术引用本文复制引用
纪跃波,杨宇恒,蒙晨琛,彭云峰..一种压电换能器的动态阻抗匹配方法与频率跟踪[J].郑州大学学报（工学版）,2025,46(3):111-117,7.基金项目
国家自然科学基金资助项目(52075463) （52075463）
福建省科技计划项目(2022H0021) （2022H0021）
