人工神经网络
过程(计算)
决策树
非线性系统
支持向量机
计算机科学
人工智能
机器学习
线性回归
机械工程
工程类
量子力学
操作系统
物理
作者
Charles Snyers,Julien Ertveldt,Jorge Sanchez-Medina,Zoé Jardon,Jan Helsen
出处
期刊:Journal of Laser Applications
[Laser Institute of America]
日期:2021-11-01
卷期号:33 (4)
被引量:2
摘要
One of today’s ongoing challenges in directed energy deposition (DED) is controlling the geometry and material properties of parts. This manufacturing process is complex and nonlinear due to multiple physical phenomena at play and is therefore hard to model analytically. Machine learning (ML) on the contrary is particularly well suited to predict the behavior of a complex process with multiple inputs and outputs such as DED. A significant amount of data is required to train machine learning models, but experimental data are costly time-wise and should therefore be produced in an intelligent way. As a stepping stone for the future production of experimental training data, a finite element model of the process was developed in this study as an unlimited source of training data for the ML models. This model takes into account the printing parameters (laser speed, laser power, and powder flow rate) and outputs’ simulated process monitoring data thanks to a postprocessing method that is outlined in this article. A dataset was produced by simulating 102 tracks in 316L stainless steel with the model. From the analysis of this dataset, it was shown that K-nearest neighbors, support vector regression, decision tree regression, linear regression, and artificial neural network models are all capable of modelling the relationship between the printing parameters and the melt pool characteristics effectively.
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