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http://dx.doi.org/10.5781/KWJS.2010.28.6.076

Study of the Constant Current Fuzzy Control System Design using CRS Algorithm during Inverter DC Resistance Spot Welding Process  

Park, Hyoung-Jin (Dept. of Mechanical Engineering, Hanyang University)
Park, Pyeong-Won (Dept. of Mechanical Engineering, Hanyang University)
Yu, Ji-Young (Dept. of Mechanical Engineering, Hanyang University)
Kim, Dong-Cheol (Advanced Welding&Joining R&D Department, KITECH)
Kang, Mun-Jin (Advanced Welding&Joining R&D Department, KITECH)
Rhee, Se-Hun (Div. of Mechanical Engineering, Hanyang University)
Publication Information
Journal of Welding and Joining / v.28, no.6, 2010 , pp. 76-83 More about this Journal
Abstract
The purpose of this study is to propose a method to decide near-optimal settings of the constant current fuzzy control parameters using a controlled random search. This method tries to find the near-optimal settings of the constant current fuzzy control parameters through experiments. It has an advantage of being able to carry out searches in the search domain which includes some irregular points. The method suggested in this study was used to determine the fuzzy control parameters by which the desired welding current were formed during inverter DC resistance spot welding. The output variable was the ITAE (integral of time multiplied by the absolute error). This output variable was determined according to the input variables, which are the GE, GDE, and GDU. This study described how to obtained near-optimal welding current condition over a wide search space conducting a relatively small number of experiments.
Keywords
Resistance spot welding; Inverter welding system; Fuzzy; Scaling factor; Optimization controlled random search; ITAE;
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