Control System Design For Lithium Profile Processing Device

With the development of the awareness of environmental protection, the amount of usage of the green lithium battery is increasing. In the process of the production, the parameters of the system varies obviously with environmental temperature, humidity, vacuum pressure, changes in processing of raw material composition and other factors. Since the system has the characteristics of multivariable, nonlinear, strong coupling and large time delay, it is difficult to establish accurate mathematical model. The PID algorithm, which is widely used in lithium-profile process control systems, can not meet the technological requirements of the products along with the increasing types of lithium.In this thesis, in order to improve the control precision the of extrusion equipment, the fuzzy PID control method is used in the lithium squeeze control system and the model reference adaptive control method is used in the column of lithium control system, respectively. The simulation shows that the control system can not only track the set value of products, but also have quickly response, small overshoot and strong robustness and other characteristics. In the practical sense, the system not only enhances the ability to adapt to the changes of control environment, as well the control precision of the column of lithium control system. Then, based on the theoretical analysis and simulation, several kinds of mature industrial control schemes are compared. Taking into account the reliability of production equipment and economic principles, a simple and mature PLC control method is selected to manufacture lithium with production equipment successfully, which is derive from the method of fuzzy PID control and model reference adaptive control.