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Simulation for Design of Automated Welding
Högskolan Väst, Institutionen för teknik, matematik och datavetenskap, Avd för elektro- och lantmäteri.ORCID-id: 0000-0001-5734-294X
Högskolan Väst, Institutionen för teknik, matematik och datavetenskap, Avd för elektro- och lantmäteri.ORCID-id: 0000-0001-5608-8636
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för produktionssystem (PS). Chalmers University of Technology, Department of Signals and Systems.
2007 (Engelska)Ingår i: EUROCON, 2007. The International Conference on "Computer as a Tool": Warsaw, Poland, 2007, IEEE Explore , 2007, s. 2263-2270Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

This paper describes a promising approach where simulations were used in the design of real-time control for automated welding. A finite element method has been used for thermal modelling of gas tungsten arc welding on a simplified test object. Measurement data for model calibration and validation was acquired through thermal imaging during weld experiments on test objects of the alloy Fe-316. An optimisation scheme for inverse modelling was employed in the calibration of the distributed weld process model. Frequency weighted model reduction and parametric system identification were applied and evaluated to get a low order model of the single-input single-output dynamics between a simulated weld heat source (actuator) and a sensor. This low order model was then successfully used for controller design where the control signal was weld current and the measured output was a moving spot temperature. Finally, the closed-loop performance was evaluated by simulation of the weld process model showing improved temperature stability relative to open loop.

Ort, förlag, år, upplaga, sidor
IEEE Explore , 2007. s. 2263-2270
Nyckelord [en]
Welding, simulation, control engineering
Nationell ämneskategori
Bearbetnings-, yt- och fogningsteknik
Forskningsämne
TEKNIK, Produktions- och materialteknik
Identifikatorer
URN: urn:nbn:se:hv:diva-204DOI: 10.1109/EURCON.2007.4400404ISBN: 1-4244-0813-X (tryckt)ISBN: 978-1-4244-0813-9 (tryckt)OAI: oai:DiVA.org:hv-204DiVA, id: diva2:212672
Konferens
EUROCON 2007
Tillgänglig från: 2009-04-23 Skapad: 2009-04-23 Senast uppdaterad: 2020-04-02Bibliografiskt granskad
Ingår i avhandling
1. Simulation-based feedback control of welding processes
Öppna denna publikation i ny flik eller fönster >>Simulation-based feedback control of welding processes
2008 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Fusion welding for joining of metals is an important manufacturing process widely used in industry, and very appreciated for its usefulness. This thesis presents a strategy dealing with the problem of designing feedback control for robotised welding. The idea is to use off-line programming where computer aided robotics for weld sequences is integrated with finite element modelling for simulations and analyses of weld processes. By this approach the design, evaluations, trials and visualisation can be made “off-line”, beside or prior to continuous production. The focus is to reduce the amount of manpower and need for physical experiments. Focuses on the results are to ensure a high quality weld with limited residual stress and deformation. Different models for two types of austenitic steels and two types of weld sources has been calibrated and validated to form a basis for this strategy. Suggestions for systematic model calibration methods have been proposed including global and local optimisation methods. Experimental work has been performed to support and verify the simulation results and the usefulness of the method. The simulation based strategy has been evaluated and proven to work successfully in two different types of applications. The method is not independent of physical experiments since it is based on models that have to be calibrated, but the experiments needed are assumed to be carried out in a simple and cost efficient way. The thesis suggests how these experiments can be performed. The use of all these technologies is assumed to form an efficient tool for the welding engineer in order to obtain high weld quality in robotised welding. The research presented indicates that the methods work well in real situations and that further work for more robust industrialisation will be beneficial for the welding community.

Ort, förlag, år, upplaga, sidor
Göteborg: Chalmers University of Technology, 2008. s. 109
Serie
Technical report / Department of Signals and Systems, Automation Research Group, Chalmers University of Technology, ISSN 1403-266X ; 2008:013
Nyckelord
Finite element modelling, Heat transfer, Model order reduction, Sensors, Weld simulation Controller design
Nationell ämneskategori
Reglerteknik
Forskningsämne
TEKNIK, Produktions- och materialteknik
Identifikatorer
urn:nbn:se:hv:diva-2409 (URN)
Presentation
2008-10-03, C120, Gustava Melins gata 2, Trollhättan, 10:15 (Engelska)
Opponent
Handledare
Tillgänglig från: 2010-04-29 Skapad: 2010-04-29 Senast uppdaterad: 2016-02-09Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltexthttp://ieeexplore.ieee.org.ezproxy.server.hv.se/stamp/stamp.jsp?tp=&arnumber=4400404

Person

Sikström, FredrikChristiansson, Anna-KarinLennartson, Bengt

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Sikström, FredrikChristiansson, Anna-KarinLennartson, Bengt
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Avd för elektro- och lantmäteriAvdelningen för produktionssystem (PS)
Bearbetnings-, yt- och fogningsteknik

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