In an effort to compensate for the declining skill levels of shipyard welders, this program researches the feasibility of building an adaptive weld control system using a rule-based expert system and appropriate sensors. the shipyard welding process that can benefit most from such a control system… More

New approaches to automatic control are needed if variable polarity plasma arc (vppa) welding is to realize its full potential as a reliable, repeatable, cost effective process.present vppa control systems are first generation, elementary computer-based systems that depend on programs which are… More

With increasing frequency, robots are being used to replace human opeaators in the welding of space structures. much effort has been expended recently in automating weldingprocess control for these applications. positioning of the weld wire is one area, however, that remains dependent on the human… More