ADAPTIVE-CONTROL OF FULL PENETRATION GAS TUNGSTEN ARE WELDING

This application paper addresses the control of a nonminimum-phase pla nt with variable large orders and delays, The process concerned is ful l penetration gas tungsten are welding, Based on an analysis of accept ed adaptive algorithms, the generalized predictive control algorithm p resented by Clarke et al. is selected as the principal control strateg y. An adaptive generalized predictive decoupling control scheme is con structed. To decouple our nonminimum-phase multivariable plant, a pred ictive decoupling algorithm is also proposed. Simulations are performe d to determine the default parameters of the algorithms. The performan ce has been tested by both simulations and experiments.