Design of Adaptive Tension Control on Tension Reel

MasterThe tension reel is a device for winding strips. The outer diameter of the coil increases continuously when the strip is wound. The dynamic characteristics of the tension reel are a time-varying system. The tension control of the tension reel should be precisely controlled to minimize the occurrence of slips and telescopes between strips. When the speed of the tension reel is accelerated or decelerated, a change in the tension occurs. This change in tension must be stabilized within a short period of time. The conventional fixed PID gain can not precisely control the tension of the system which varies according to the outer diameter of the coil. Therefore, an adaptive PID gain is required to match the change of tension reel dynamics with the change of the outer diameter of the coil. In this study, the tension reel control system was modeled through Matlab and implemented similar to actual system. Throughout simulations, we confirmed the problem of fixed PID gain during speed change The adaptive PID gains according to the coil outer diameter were derived by experiments. Then, the derived PID gain is expressed as a relational expression for the coil outer diameter. Finally, we applied the adaptive PID gain function to the Tension Reel PID control system and confirmed that the tension control is stabilized