Decentralized control design using Integrator Backstepping for controlling web winding systems

Many types of materials are manufactured or processed in the form of a sheet or a web (textile, paper, metal, etc.), which then couples the processing rolls and the associated motor drives. In Winding and web transport systems, the main concern is to control independently speed and tension in spite of disturbances such as radius variations and changes of set point, and to the coupling introduced by the elastic web. So the increasing requirement on the control performance led to investigation for sophisticated control strategies. To improve the overall performance of the winding system, we propose to apply decentralized control based an Integrator Backstepping strategy for controlling web winding systems. The advantage of this type of control is to impose stability properties by building recursively a Lyapunov function for the overall cascade system. Our winding system is simulated in Matlab^®/Simulink™ environment, the results obtained illustrate the efficiency of the proposed control, with no overshoot, and the rising time is improved with good disturbance rejection comparing with the classical control law (PI controller).