Development of fuzzy PID control system for hot strip finishing mill

Presents the design method of a controller for a looper system in a hot strip finishing mill. Looper response time is related to the performance of the tension control to reduce the delivery width error. The quality of the hot strip product, especially width deviation at the top of the strip, is greatly influenced by the precision of the tension control. In the paper, a fuzzy PID control system is designed to obtain the fast looper angle response and the high control precision. Computer simulation to verify the performance of the new controller is executed. From the results of the simulation, the tension can obtain better performance than that of the conventional PID.