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JWJ > Volume 28(6); 2010 > Article
Journal of KWJS 2010 December;28(6) :76-83.
Published online January 10, 2011.
Study of the Constant Current Fuzzy Control System Design using CRS Algorithm during Inverter DC Resistance Spot Welding Process
HyoungJin Park, PyeongWon Park, Jiyoung Yu, DongCheol Kim, MunJin Kang, Sehun Rhee





Correspondence:   Published online January 10, 2011
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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