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。
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 frequency tracking algorithm based on the Mason equivalent model that can simultaneously calculate the resonant 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 corresponding 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.
作者
姚震
罗子伦
刘凯捷
丁荣杰
莫毅强
何建
乌斯别斯基·亚历山大
YAO Zhen;LUO Zilun;LIU Kaijie;DING Rongjie;MO Yiqiang;HE Jian;USPENSKIY Alexander(Guangdong University of Technology,Guangzhou 510006,China;Guangzhou Kepu Ultrasonic Electric Technology Co.,Ltd.,Guangzhou 510520,China;International Technology Transfer Center of the National Academy of Sciences of Belarus,Minsk 220012,Republic of Belarus)
出处
《应用声学》
CSCD
北大核心
2024年第1期190-197,共8页
Journal of Applied Acoustics
基金
广东省科技计划项目(2021A0505030068)
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
Frequency tracking
Full-state control
Mis-tracking
Ultrasonic generator
Ultrasonic metal weld-ing