Control of dynamic keyhole welding process

11 years 3 days ago
Control of dynamic keyhole welding process
Weld joint penetration control is a basic research topic in the welding research community. The authors propose using an innovative plasma arc welding process referred to as the quasi-keyhole process to achieve less application-dependent weld joint penetration sensing and control. To control the quasi-keyhole process, the peak current and keyhole sustaining current are selected as the control variables to maintain the keyhole establishment and sustaining periods at desired values. The dynamic quasi-keyhole process is approximated by a linear model with interval parameters. A control algorithm has been developed for the multivariable interval quasi-keyhole process based on a predictive control algorithm for interval SISO models. Experiments have been conducted to test the effectiveness of the control system developed. ᭧ 2007 Elsevier Ltd. All rights reserved.
Y. M. Zhang, Y. C. Liu
Added 08 Dec 2010
Updated 08 Dec 2010
Type Journal
Year 2007
Authors Y. M. Zhang, Y. C. Liu
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