Feedback Linearization Based Arc Length Control for Gas Metal Arc Welding

Jesper Sandberg Thomsen

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

20 Citations (Scopus)


In this paper a feedback linearization based arc length controller for gas metal arc welding (GMAW) is described. A nonlinear model describing the dynamic arc length is transformed into a system where nonlinearities can be cancelled by a nonlinear state feedback control part, and thus, leaving only a linear system to be controlled by linear state feedback control. The advantage of using a nonlinear approach as feedback linearization is the ability of this method to cope with nonlinearities and different operating points. However, the model describing the GMAW process is not exact, and therefore, the cancellation of nonlinear terms might give rise to problems with respect to robustness. Robustness of the closed loop system is therefore nvestigated by simulation.
Original languageEnglish
Title of host publicationProceedings of the 2005 American Control Conference. Vol. 5
Number of pages6
PublisherElectrical Engineering/Electronics, Computer, Communications and Information Technology Association
Publication date2005
Publication statusPublished - 2005
EventAmerican Control Conference, ACC - Portland, Oregon, United States
Duration: 8 Jun 200510 Jun 2005


ConferenceAmerican Control Conference, ACC
CountryUnited States
CityPortland, Oregon

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