A hybrid control method of tension and position for a discontinuous web transport system

Tension control and precise conveyance in web-handling machines are critical to ensure product quality. This paper is focused on actualizing a hybrid control method of tension and position for a discontinuous web transport system. First, the simplified algebraic dynamical models of the unwind/rewind section and feed section are presented, which plays an important role for the moving control of flexible web. Second, the hybrid control method, the PID tension control, the synchronous position control and the hybrid control, are introduced, respectively. Finally, based on the mathematical model and control strategies, an experiment platform is established. Several experiments have been performed to show the efficiency and feasibility of this hybrid control method for discontinuous web transport system.