[1]张晓芳*,阚凤龙,李佳量.doi: 10.3969/j.issn.1001-3849.2025.10.005热浸镀锌低碳钢丝表面镀层厚度自动化控制方法[J].电镀与精饰,2025,(10):33-38.
　Zhang Xiaofang*,Kan Fenglong,Li Jialiang.Automated control method for surface coating thickness of hot-dip galvanized low-carbon steel wire[J].Plating & Finishing,2025,(10):33-38.
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doi: 10.3969/j.issn.1001-3849.2025.10.005热浸镀锌低碳钢丝表面镀层厚度自动化控制方法()

《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:
期数:
2025年10
页码:
33-38
栏目:
出版日期:
2025-10-31

文章信息/Info

Title:
Automated control method for surface coating thickness of hot-dip galvanized low-carbon steel wire
作者:
张晓芳1*; 阚凤龙2; 李佳量3
(1. 苏州健雄职业技术学院,江苏 苏州 215411 ;2. 沈阳建筑大学 电气与控制工程学院,辽宁 沈阳 110168 ;3. 集成电路科学与工程学院(产教融合学院)
Author(s):
Zhang Xiaofang1*;  Kan Fenglong2;  Li Jialiang3
(1. Suzhou Chien-Shiung Institute of Technology, Suzhou 215411, China; 2. School of Electrical & Control Engineering, Shenyang Jianzhu University, Shenyang 110168, China; 3. College of Integrated Circuit Science and Engineering (College of Institute of Industry-Education Integration), Nanjing 210023, China)
关键词:
PLC技术; 镀层厚度控制; 前馈控制; 反馈控制; Simth补偿器
Keywords:
PLC technology;  coating thickness control;  feedforward control;  feedback control;  Simth compensator
分类号:
TP273
文献标志码:
A
摘要:
在热浸镀锌低碳钢丝表面镀层厚度控制过程中，气刀扭曲、倾斜、带钢振动及版型缺陷等非线性因素会引入随机误差，导致镀层厚度偏差累积，难以实现有效的控制。为此，提出热浸镀锌低碳钢丝表面镀层厚度自动化控制方法。利用PLC技术设计热浸镀锌低碳钢丝表面镀层厚度控制器，根据镀层厚度模型确定镀层厚度控制参数，采用前馈控制与反馈控制相结合的方式，通过估计有效距离和修正气刀压力降低误差。引入反馈控制，利用PLC控制器实时修正气刀与带钢间距，及时补偿随机误差，降低气刀扭曲引起的非线性误差。为了进一步提高控制精度，在反馈控制中引入脉冲-延迟方法，动态改变气刀压力，并计算比例增益和气刀压力修正值。设置Smith补偿器对修正值进行补偿，消除倾斜、带钢振动及版型缺陷等非线性因素对稳定性的影响，进一步减少镀层厚度偏差累积，提高镀层厚度控制精度。实验结果表明，该方法可有效控制气刀压力，实现高精度的镀层厚度控制。
Abstract:
In the process of controlling the thickness of the coating on hot-dip galvanized low-carbon steel wire surface, nonlinear factors such as air knife distortion, inclination, strip vibration, and pattern defects can introduce random errors, leading to the accumulation of coating thickness deviation and making it difficult to achieve effective control. Therefore, an automated control method for the surface coating thickness of hot-dip galvanized low-carbon steel wire is proposed. A coating thickness controller for the surface of low-carbon steel wire in hot-dip galvanizing is designed using PLC technology. The coating thickness control parameters are determined based on the coating thickness model. A combination of feedforward control and feedback control is adopted to estimate the effective distance and correct the air knife pressure to reduce errors. Feedback control is introduced to use the PLC controller to correct the distance between the air knife and the steel strip in real time, compensating for random errors promptly and reducing the nonlinear errors caused by the distortion of the air knife. In order to further improve control accuracy, a pulse delay method is introduced in feedback control to dynamically change the air knife pressure and calculate the proportional gain and air knife pressure correction value. A Smith compensator is set up to compensate for the correction value, eliminating the influence of nonlinear factors such as tilt, steel strip vibration, and plate shape defects on stability, further reducing the accumulation of coating thickness deviations, and improving the control accuracy of the coating thickness. The experimental results show that this method can effectively control the air knife pressure and achieve high-precision coating thickness control

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更新日期/Last Update: 2025-10-15