Modeling and control of quasi-keyhole arc welding process

Y. M. Zhang, Y. C. Liu

Research output: Contribution to journalArticlepeer-review

63 Scopus citations


Quasi-keyhole is a novel approach proposed to operate the keyhole arc welding process. Because the method's effectiveness depends on the amperage of the peak current used to establish the keyhole, this paper proposes adjusting the amperage based on the duration of the peak current, which equals the keyhole establishment time. A nominal model structure has been selected from those identified using experimental data and been used in the design of an adaptive predictive control system. Closed-loop control experiments have been conducted to verify the effectiveness of the developed system under varying set-points and varying travel speeds.

Original languageEnglish
Pages (from-to)1401-1411
Number of pages11
JournalControl Engineering Practice
Issue number12
StatePublished - Dec 2003

Bibliographical note

Funding Information:
This work is funded by the US National Science Foundation under Grant DMI-9812981, US National Shipbuilding Research Program, and the University of Kentucky Manufacturing Center.


  • Manufacturing
  • Modeling
  • Predictive control
  • Welding

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


Dive into the research topics of 'Modeling and control of quasi-keyhole arc welding process'. Together they form a unique fingerprint.

Cite this