Control of GMA Butt Joint Welding Based on Neural Networks

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedings – Annual report year: 2004Researchpeer-review

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This paper presents results from an experimentally based research on Gas Metal Arc Welding (GMAW), controlled by the artificial neural network (ANN) technology. A system has been developed for modeling and online adjustment of welding parameters, appropriate to guarantee a high degree of quality in the challenging field of butt joint welding with full penetration under stochastically changing boundary conditions, e.g. major gap width variations. GMAW experiments performed on mild-steel plates (3 mm of thickness), show that high quality welds with uniform back-bead geometry are achievable for gap width variations from 0.5 mm to 2.3 mm - scanned 10 mm in front of the electrode location. In this research, the mapping from joint geometry and reference weld quality to significant welding parameters has been based on a static multi-layer feed-forward network. The Levenberg-Marquardt algorithm, for non-linear least square error minimization, has been used with the back-propagation algorithm for training the network, while a Bayesian regularization technique has been successfully applied for minimizing the risk of inexpedient over-training.
Original languageEnglish
Title of host publicationProcedings of 13th International Conference on Computer Technology in Welding
PublisherNational Institute of Standards and Technology
Publication date2004
Publication statusPublished - 2004
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ID: 2548832