[1]纪跃波,杨宇恒,蒙晨琛,等.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(03):111-117.[doi:10.13705/j.issn.1671-6833.2024.06.013]
　JI Yuebo,YANG Yuheng,MENG Chenchen,et al.A Dynamic Impedance Matching Method and Frequency Tracking of Piezoelectric Transducers[J].Journal of Zhengzhou University (Engineering Science),2025,46(03):111-117.[doi:10.13705/j.issn.1671-6833.2024.06.013]
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一种压电换能器的动态阻抗匹配方法与频率跟踪()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
46
期数:
2025年03期
页码:
111-117
栏目:
出版日期:
2025-05-13

文章信息/Info

Title:
A Dynamic Impedance Matching Method and Frequency Tracking of Piezoelectric Transducers
文章编号:
1671-6833(2025)03-0111-07
作者:
纪跃波1;  杨宇恒1;  蒙晨琛1;  彭云峰2
1.集美大学 海洋装备与机械工程学院,福建 厦门 361021;2.厦门大学 航空航天学院,福建 厦门 361102
Author(s):
JI Yuebo1;  YANG Yuheng1;  MENG Chenchen1;  PENG Yunfeng2
1.College of Marine Equipment and Mechanical Engineering,Jimei University, Xiamen 361021,China; 2.School of Aerospace Engineering, Xiamen University, Xiamen 361102, China
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
Keywords:
piezoelectric transducer;  T-mode matched network;  dynamic impedance matching;  frequency tracking;  data fitting;  the least squares method
分类号:
TB552
DOI:
10.13705/j.issn.1671-6833.2024.06.013
文献标志码:
A
摘要:
动态阻抗匹配技术能够提高压电换能器的输出功率和能量转换效率。现有动态阻抗匹配方法多采用智能数值寻优算法,但智能算法建模复杂、迭代时间长、计算量大,针对这一问题,提出了一种基于数据拟合的动态阻抗匹配方法,并设计了相应的可无级调节的T型阻抗匹配网络。所提方法通过工作频率微调,获取对应频率下换能器电阻、电抗分量的观测值,以最小残差平方和为判断依据,得到一组拟合程度最高的换能器等效电路参数,结合相关公式计算出匹配网络元件参数和换能器串联谐振频率,在实现换能器动态阻抗匹配的基础上,进一步实现了频率追踪功能。在Python中对动态阻抗匹配方法进行仿真,在MATLAB/Simulink中搭建仿真电路对阻抗匹配与频率追踪的效果进行仿真,结果表明:所提方法能够较为准确地得到换能器等效电路参数,匹配后的T型阻抗匹配网络两端的电压、电流信号基本同相,有功功率有了明显提升,匹配效果良好,并且相较于遗传算法匹配速度也有了显著提升。
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 optimization 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 parameters 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 transducer 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 Ttype impedance matching network were basically in phase, the active power was significantly improved, the matching effect was good, and the matching speed was also significantly improved compared with the genetic algorithm.

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更新日期/Last Update: 2025-05-22