Variable-Structure Proportional–Integral–Derivative Laser Solder Joint Temperature Intelligent Control Method with Adjustable Power Upper Limit

Laser soldering is a crucial soldering technique in the realm of electronic assembly. The temperature of the solder joint is intimately connected with the quality of the solder. This paper introduces an adjustable power upper limit variable-structure Proportional–Integral–Derivative (PID) intelligen...

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Bibliographic Details
Published in:Micromachines (Basel) 2023-08, Vol.14 (8), p.1618
Main Authors: Li, Mingchao, Cao, Pengbin, Zhang, Cong, Yan, Kuan, Zhang, Yuquan
Format: Article
Language:English
Subjects:
adjustable power upper limit
Algorithms
Artificial neural networks
Closed loops
Control algorithms
Control methods
Controllers
Dynamic response
Electronic assemblies
electronic assembly
Heat
laser soldering
Lasers
Methods
Neural networks
Optimization
parameter optimization
Process parameters
Proportional integral derivative
solder joint temperature
Soldered joints
Soldering
Solders
Task analysis
Temperature
Temperature control
Thermal cycling
Variable structure control
variable-structure PID
Workpieces
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Summary:Laser soldering is a crucial soldering technique in the realm of electronic assembly. The temperature of the solder joint is intimately connected with the quality of the solder. This paper introduces an adjustable power upper limit variable-structure Proportional–Integral–Derivative (PID) intelligent control method for regulating the temperature of the solder joint during laser soldering. Distinct laser power limits are employed for workpieces with varying heat capacities. The solder joint temperature is monitored through an infrared thermometer, which enables closed-loop temperature control via a variable-structure PID algorithm. Residual neural network (ResNet) models are utilized to predict key soldering process parameters. This method has been executed and validated on a practical testing platform. Compared to other laser soldering control techniques, the proposed method demonstrates a low overshoot, rapid dynamic response, and swift adjustment capabilities, effectively enhancing the soldering quality and production efficiency.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi14081618