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Model based feedback control of gas tungsten arc welding - An experimental study

Fredrik Sikström ; Anna-Karin Christiansson ; Bengt Lennartson (Institutionen för signaler och system, Automation)
11th IEEE International Conference on Automation Science and Engineering, CASE 2015, Gothenburg, Sweden, 24-28 August 2015 (2161-8070). p. 411-416. (2015)
[Konferensbidrag, refereegranskat]

In order to obtain high structural integrity and joint performance in welding a transient heat conduction model has been utilized to design a model based feedback controller. Gas tungsten arc welding of work-pieces of austenitic steel have been simulated by the finite element method. The basis for controller design is a low order model obtained from parametric system identification. The identification has been performed both on the finite element simulation and on physical welding. The low order model responses show a good agreement with both the finite element simulation result and the physical process response. An experimental study has been performed to verify the approach. This study also explores what experiments are needed for a successful design. It is shown that model based control successfully mitigates perturbations that occur during welding.

Denna post skapades 2016-01-18. Senast ändrad 2016-08-23.
CPL Pubid: 230813


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Institutioner (Chalmers)

Institutionen för signaler och system, Automation


Robotteknik och automation

Chalmers infrastruktur