Title :
Robust nonlinear control of current and arc length in GMAW systems
Author :
Jalili-Kharaajoo, Mahdi ; Gholampour, Vahid ; Ebrahimirad, Hassan ; Ashari, Alireza Esna
Author_Institution :
Dept. of ECE, Tehran Univ., Iran
Abstract :
A feedback linearization controller based on sliding mode control action for a gas metal arc welding (GMAW) system is proposed. The controller uses nonlinear state feedback to exactly linearize and decouple the GMAW system. The linearized system is then controlled using model reference sliding mode controllers. The effect of parameter uncertainty over the closed loop system performance is investigated. Simulation results show the effectiveness of the proposed controller.
Keywords :
arc welding; closed loop systems; nonlinear control systems; robust control; state feedback; variable structure systems; GMAW system; arc length control; closed loop system performance; current control; feedback linearization controller; gas metal arc welding; nonlinear state feedback; parameter uncertainty; robust nonlinear control; sliding mode control action; sliding mode controllers; Closed loop systems; Control system synthesis; Control systems; Linear feedback control systems; Nonlinear control systems; Robust control; Sliding mode control; State feedback; Uncertain systems; Welding;
Conference_Titel :
Control Applications, 2003. CCA 2003. Proceedings of 2003 IEEE Conference on
Print_ISBN :
0-7803-7729-X
DOI :
10.1109/CCA.2003.1223201
