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102 Welding Robots
                           be defective with  respect  to predefined specification  and/or nominal  operating
                           parameters. Methods also exist to use the data from monitoring systems to control
                           the weld  process in real time through a model  based control scheme.  However,
                           such control needs to be tuned for every case and is not in general use today.

                           3.11 References


                           [1]  Adolfsson S, “Automatic Quality Monitoring in GMA Welding using Signal
                               Processing Methods”, PhD Thesis, Lund University, Dept. of Mechanical Engineering,
                               1998.
                           [2]  Ågren B, “Sensor Integration for Robotic Arc Welding”, PhD Thesis, Lund University,
                               Dept. of Mechanical Engineering, 1995
                           [3]  Cederberg P, Olsson M and Bolmsjö G, “Virtual  triangulation sensor development,
                               behavior simulation and CAR integration applied to robotic arc-welding”, Journal of
                               Intelligent and Robotic Systems, 35(4):365-379.
                           [4]  Cook GE, et al, “Electric arc sensing for robot positioning control. Robotic Welding”,
                               pages 181-216. Editor: J. D. Lane. IFS Publications Ltd, UK, Springer-Verlag, 1987.
                           [5]  Fridenfalk M, “Development of Intelligent Robot System Based on Sensor Control”,
                               PhD Thesis, Lund University, Dept. of Mechanical Engineering, 2003.
                           [6]  Blakely PJ, “Developments in monitoring systems for resistance and arc welding”, In
                               Proceedings of the International Conference on Automated Welding Systems in
                               Manufacturing.  Gateshead, North East UK, November 1992. Woodhead Publishing
                               Ltd., paper 40.
                           [7]  Kisselevski F, Shvydkii N and Dolinenko V, “Mathematical simulation of scanning arc
                               in MIG-welding”, In Proceedings of the International Conference on Automation and
                               Robotisation in Welding  and  Allied Processes, pages 146-150, Strasbourg,  France,
                               1985.
                           [8]  Amson  JC, “Lorentz force in the molten tip of an arc electrode”, British Journal of
                               Applied Physics, 16:1169-1179, 1965.
                           [9]  Allum CJ,  “Metal transfer in arc welding as a varicose instability: I. Varicose
                               instabilities in a current-carrying liquid cylinder with surface change”, British Journal
                               of Applied Physics, 18(7): 1447-1468, 1985.
                           [10] Hermans MJM, Spikes MP and den Ouden G, “Characteristic features of the short
                               circuiting arc welding process”, Welding Review International, 12(2):80-86, November
                               1993.
                           [11] Rehfeldt D and Schmitz T, “Investigation and measurement of weld pool oscillation in
                               GMAW”, Technical Report, IIW-Doc 212-882-95, 1995.
                           [12] Lucas W, Ahmed N and Hutt  G, “Process stability  in MIG welding”  The  Welding
                               Institute Research Bulletin, pages 329-336, October 1983.
                           [13] Leino K, Nikkola A and Vartiainen K, “Prediction of weld defects using welding
                               condition data”, Research Report 264, Technical Research Center of Finland, Espoo,
                               1984.
                           [14] Gupta SR, Gupta PC and Rehfeldt D, “Process stability and spatter generation during
                               dip transfer in MAG welding”, Welding Review, pages 232-241, November 1988.
                           [15] Mita T, Sakabe A and Yokoo T, “Quantitative estimates of arc stability for CO 2  gas
                               shielded arc welding”, Welding International, 12(2):152-159, 1988.
                           [16] Liu S and Siewert T, “Metal transfer in gas metal arc welding: Droplet rate”, Welding
                               Journal, 68(2):52-58, 1989.
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