Fuzzy Fractional-order PID Control of The Winding Web Tension in Flexible Electronic roll-to-roll manufacturing process

The winding system of the flexible electronic roll-to-roll manufacturing process is located at the end of the equipment, the web tension accuracy of the winding system directly affects the quality of the final flexible electronic products. Velocity disturbance is the key problem of the web tension control in winding system. In this paper, the web dynamics of the winding system is studied, the tension and velocity models of winding web are established, and the cascade tension control model of winding roller is designed. The numerical realization method and steps of fuzzy fractional (PID mu)-D-lambda (FFPID) controller are presented for winding tension. The structure of the FFPID controller is constructed by using fractional PID unit to replace the PID unit in the traditional fuzzy PID (FPID) controller. The flexibility and freedom of the integer-order PID controller not only increase, but also the adaptive adjustment of controller parameters is realized. Compared with PID and FPID control, the FFPID algorithm proposed in this paper improves the terms of time-domain indexes such as steady-state accuracy, regulation time and overshoot, so as to obtain better control performance. Thus, the quality of roll-to-roll flexible electronic products is guaranteed.