Title: Adaptive voltage control of gas tungsten arc welding

Authors: Reginald Crawford, George E. Cook, Alvin M. Strauss, Daniel A. Hartman

Addresses: Welding Automation Laboratory, Vanderbilt University, Nashville, TN, USA. ' Welding Automation Laboratory, Vanderbilt University, Nashville, TN, USA. ' Welding Automation Laboratory, Vanderbilt University, Nashville, TN, USA. ' NMT-10: Process Science and Technology, Los Alamos National Laboratory, Los Alamos, NM, USA

Abstract: An adaptive control based on fuzzy logic has been implemented for Gas Tungsten Arc Welding (GTAW). This adaptive controller eliminates the problems frequently experienced with traditional Automatic Voltage Control (AVC) systems, which do not adequately perform for all operational conditions because of the non-linear relationship between the arc voltage, current and arc length. This paper examines the differences between fuzzy logic control and adaptive fuzzy logic control of gas tungsten arc welding.

Keywords: gas tungsten arc welding; GTAW; adaptive control; fuzzy logic; voltage control; fuzzy control; nonlinear systems.

DOI: 10.1504/IJMIC.2006.010106

International Journal of Modelling, Identification and Control, 2006 Vol.1 No.2, pp.133 - 139

Published online: 17 Jun 2006 *

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