The Research Of Tension Controlling System Of Decoiler Based On The Fuzzy Adaptive Pid Controller

It's very important of the tension quality during the winding and unwinding.This paper derives from the project"Baosteel 2050 hot rolling slitter line renovation project". Obtaining the effect of tension control is crucial in increasing persent of pass and improving the product quality. The main mission of automatic control in decoiling process is to keep the constant tension of band steel, which is critical in decoiling process control. The paper selects the decoiler constant tension control system as its main study object.Firstly, hardware equipments that need to be renovated in the control system are introduced, along with the communication and control mode between hardware. The computing methods of two important factors that influence computing precision of tension are analysed-----coil diameter calculating and inertia moment.Secondly,decoiler tension control system is explained. Furthermore, with the application of the adaptive control theory, combined with the time-varying parameter rules, a fuzzy adaptive PID control algorithm is detailedly analyzed and applied to winding tension system. introduces the principle of the tension engendering,the elementary theory knowledge of typical PID control algorithm and fuzzy control algorithm,combined the advantages of them, points out to import the fuzzy adaptive control strategy into the tension control of the steel strip,With the help of MATLAB, the model of the fuzzy adaptive PID control system is simulated.The result of the simulation indicates that the tension precision of the fuzzy adaptive PID control system is better than that of conventional system. The influence by the time-varying parameter on system is eliminated soundly.