Multifunctional Arc-Welding Controller Using SOSMC Technique

Abstract

With the help from all round technological growth, the control needs of many engineering processes are now better understood and better controlled. It has been noticed that during the prolonged concept development phase of sliding mode control (SMC), the control needs in arc-welding process, in particular, have drifted significantly. Now, single controller is capable of making all type of joint characteristics using different methods. Well-researched SMC concept has not been tried yet to develop multifunctional arc controller to cater multi input applications. Proportional-plus-integral controller, with assistance from modern soft-switched power converter topology, in particular, is strongly placed. In this brief, using super-twisting algorithm, the second-order SMC concept has been applied to design a complete multifunctional arc-welding controller. Apart from demonstrating superior control characteristics, this brief also elaborates the lateral impact of robustness measures. It also explores whether the proposed controller can deliver as a superior alternate for complete control of arc-welding process.