Arc length stable method of GTAW based on adaptive Kalman filter. (March 2021)

• Record Type: Journal Article
• Authors: Wang, Hui; Lei, Ting; Rong, Youmin; Shao, Wenjun; Huang, Yu
• Is Part Of: Journal of manufacturing processes. Volume 63(2021)
• Page Start: 130
• Page End: 138
• Publication Date: 2021-03
• Subjects: GTAW -- Adaptive Kalman filter -- Arc voltage -- Arc length; Production management -- Data processing -- Periodicals; Manufacturing processes -- Periodicals; Procestechnologie; Productietechniek; Production -- Gestion -- Informatique -- Périodiques; Fabrication -- Périodiques; Manufacturing processes; Production management -- Data processing; Periodicals; 670.5
• DOI: 10.1016/j.jmapro.2020.01.029
• Languages: English
• ISSNs: 1526-6125

Abstract

Graphical abstract: Highlights: Arc voltage sensor was used to collect DC pulse GTAW arc length information. The arc length control during the welding process was realized to keep the arc length stable. The arc length-arc voltage relationship under certain conditions was obtained. Kalman and adaptive Kalman filter algorithms were used for welding state estimation. The effect of arc length adjustment between Kalman filter and adaptive Kalman filter was compared. Abstract: During the GTAW process, the arc length changes due to the uneven surface of the workpiece and the loss of the tungsten electrode. In order to keep the arc length stable and improve the welding quality, this paper proposed the application of an adaptive Kalman filter as a signal preprocessor for automatic voltage control. In this paper, a linear relationship model between arc voltage and arc length in DC pulse GTAW was established, and Kalman filter and adaptive Kalman filter were applied to the welding process. Experiments showed that the arc length adaptive method based on adaptive Kalman filter could significantly improve the arc length stability. By using the adaptive Kalman filter algorithm, the standard deviation of the arc length was reduced by 35.4 %.