The design for tension fuzzy variable-structure control system of electric cable plastic wrapping process

A tension fuzzy variable-structure control system was designed for constant tension of electric cable plastic wrapping automatic production process. This system contains two inner loops for current and velocity and one outer tension loop, the two inner loops are both using PI regulators; its outer loop for tension control is using fuzzy controller. Simulation results indicate that the fuzzy controller has better performances than classical PID control method. The system has quick speed of response and stronger robustness for constant tension of electric cable control, and improves the precision about the thickness and shapes of steel straps.