Page 194 - 《应用声学》2024年第1期

第 43 卷 第 1 期 Vol. 43, No. 1
2024 年 1 月 Journal of Applied Acoustics January, 2024

⋄ 研究报告 ⋄

超声焊接全状态频率跟踪算法 ∗

姚 震 1† 罗子伦 1 刘凯捷 1 丁荣杰 1 莫毅强 1
何 建 2 乌斯别斯基·亚历山大 3

(1 广东工业大学 广州 510006)
(2 广州市科普超声电子技术有限公司 广州 510520)
(3 白俄罗斯国家科学院国际技术转移中心 明斯克 220012)

摘要：超声金属焊接负载重且变化剧烈，易导致换能器出现无阻性点和电源频率误跟踪。基于梅森等效模型，
提出一种能同时计算出谐振频率与反谐振频率，避免误跟踪的全状态频率跟踪算法。存在阻性点时，利用 3 个
不同发波频率及其对应的相位差，算出跟踪目标频率；当换能器处于无阻性点状态时，把跟踪目标变为相位差
最小点，从而实现全状态频率跟踪。通过仿真软件对算法进行仿真，算法能有效避免误跟踪。焊接试验结果表
明，能较易实现谐振频率和反谐振频率的频率跟踪，在无阻性点的工况下焊接过程平稳。
关键词：频率跟踪；全状态控制；误跟踪；超声电源；超声金属焊接
中图法分类号: TB552 文献标识码: A 文章编号: 1000-310X(2024)01-0190-08
DOI: 10.11684/j.issn.1000-310X.2024.01.022

Full-state frequency tracking algorithm of ultrasonic welding

YAO Zhen 1 LUO Zilun 1 LIU Kaijie 1 DING Rongjie 1 MO Yiqiang 1 HE Jian 2

USPENSKIY Alexander 3
(1 Guangdong University of Technology, Guangzhou 510006, China)

(2 Guangzhou Kepu Ultrasonic Electric Technology Co., Ltd., Guangzhou 510520, China)
(3 International Technology Transfer Center of the National Academy of Sciences of Belarus, Minsk 220012, Republic of Belarus)

Abstract: Ultrasonic metal welding loads are heavy and vary drastically, which can easily lead to non-resistive
frequency state in the transducer and supply frequency mis-tracking. This paper proposes an full-state fre-
quency tracking algorithm based on the Mason equivalent model that can simultaneously calculate the reso-
nant and anti-resonant frequencies to avoid mis-tracking. When the transducer has resonant frequency and
anti-resonant frequency, the target frequency is calculated by using three different frequencies and their corre-
sponding phase differences in welding process; when transducer is in non-resistive frequency state, the tracking
target is changed to the point with the minimum phase difference, thus achieving full-state frequency tracking.
The algorithm was simulated by simulation software and it was concluded that the algorithm can avoid the
frequency mis-tracking phenomenon. The welding test results show that the frequency tracking of resonant
frequency and anti-resonant frequency can be easily achieved, and the welding process is smooth when the
transducer is in the non-resistive frequency state.
Keywords: Frequency tracking; Full-state control; Mis-tracking; Ultrasonic generator; Ultrasonic metal weld-
ing
2022-09-06 收稿; 2023-02-28 定稿
广东省科技计划项目 (2021A0505030068)
∗
作者简介: 姚震 (1976– ), 男, 广东韶关人, 高级实验师, 博士, 硕士生导师, 研究方向: 超声加工技术。
† 通信作者 E-mail: yaozhen@gdut.edu.cn