Study of Dynamic Resistance Based Controllers for Resistance Spot Welding Process

This work deals with the study of dynamic resistance based controllers namely 1) Proportional Integral Controller and 2) Fuzzy Logic Controller. These two controllers were tested under different external disturbances. All welds were performed on 1 mm to 1mm low carbon steel sheets. The relevant data were collected and the behavior of the dynamic resistance was studied. Destructive tests were performed on the welded samples to measure the strength of the welds. The test results show that the controllers based on dynamic resistance produced good welds even under external disturbances.