Robust sensing and control of the weld pool surface

Wei Lu, Yuming Zhang

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Gas tungsten arc welding is the primary process for precision joining. To develop a control system for this process, a novel sensor is proposed to measure the depth of the weld pool surface using a non-transferred arc. A flat surface is periodically established to provide a real-time reference. The main-arc-on period is selected as the system's input. Because of possible large variations/ranges in manufacturing conditions, an interval model control algorithm with updated intervals is adopted. To demonstrate the use of the proposed sensor and control algorithm, closed-loop experiments under different variations have been conducted. Circumferential butt welding of steel pipe has also been included as an application example.

Original languageEnglish
Article number010
Pages (from-to)2437-2446
Number of pages10
JournalMeasurement Science and Technology
Issue number9
StatePublished - Sep 1 2006


  • Adaptive control
  • Joint penetration
  • Manufacturing processes
  • Pool surface
  • Predictive control
  • Sensor systems
  • Sensors
  • Weld penetration
  • Weld pool
  • Welding processes

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics


Dive into the research topics of 'Robust sensing and control of the weld pool surface'. Together they form a unique fingerprint.

Cite this