RT info:eu-repo/semantics/article T1 Comparative study of classification algorithms for quality assessment of resistance spot welding joints from preand post-welding inputs A1 Martín, Óscar A1 Ahedo García, Virginia A1 Santos Martín, José Ignacio A1 Galán Ordax, José Manuel K1 Resistance spot welding K1 Quality control K1 Welding parameters K1 Ultrasonic testing K1 Tree ensembles K1 Stacking K1 Welding K1 Acoustics K1 Classification algorithms K1 Electrodes K1 Steel K1 Boosting K1 Testing K1 Materiales K1 Materials K1 Ingeniería mecánica K1 Mechanical engineering K1 Ensayos (Tecnología) K1 Testing AB Resistance spot welding (RSW) is a widespread manufacturing process in the automotive industry. There are different approaches for assessing the quality level of RSW joints. Multi-input-single-output methods, which take as inputs either the intrinsic parameters of the welding process or ultrasonic nondestructive testing variables, are commonly used. This work demonstrates that the combined use of both types of inputs can significantly improve the already competitive approach based exclusively on ultrasonic analyses. The use of stacking of tree ensemble models as classifiers dominates the classification results in terms of accuracy, F-measure and area under the receiver operating characteristic curve metrics. Through variable importance analyses, the results show that although the welding process parameters are less relevant than the ultrasonic testing variables, some of the former provide marginal information not fully captured by the latter. PB Institute of Electrical and Electronics Engineers (IEEE) YR 2022 FD 2022-01 LK http://hdl.handle.net/10259/6386 UL http://hdl.handle.net/10259/6386 LA eng NO This work was supported in part by the Spanish Ministry of Science, Innovation and Universities (Excellence Networks) under Grant HAR2017-90883-REDC and Grant RED2018-102518-T, and in part by the Junta de Castilla y León Consejería de Educación under Grant BDNS 425389. The work of Virginia Ahedo was supported by the European Social Fund. DS Repositorio Institucional de la Universidad de Burgos RD 24-nov-2024