Research On Overheated Water Temperature Control System Of Tire Curing

Curing is the last and the most important procedure of tire manufacture. The quality of tire is directly influenced by the performance of the curing efficiency. Effective control of curing medium temperature is particularly important, because it is a critical determinant for curing degree and uniformity to meet the technical requirement.The research object of this thesis is overheated water curing medium of radial tire. Some influence factors and obstructions which caused by temperature measuring delay and flow changing of filling water and backwater are analyzed deeply aiming at solving the problem of the temperature fluctuation, the conduit vibrates and fault of heat-exchange pump caused by control delay, product quality decline, etc. Through simplifying the model deaerating heating device, combined with the assumptions, we established the mathematic model of overheated water temperature control system based on heat transfer rule and thermal equilibrium analysis. Because the system has the characteristics of time-varying, uncertainty and control delaying, so we introduced the PIDGPC control algorithm which combine the advantages of PID algorithm with the advantages of GPC algorithm. This algorithm not only hold the characteristics of conveniently using and effectively suppressing overshoot of PID control, but also keep the characteristics of having good robustness and effectively overcoming the control delay of GPC control. It enables the system can accurately control the temperature of overheated water.Finally through the simulation, we analyzed the control performance of PIDGPC overheated water temperature control system, and compared the simulation results with GPC predictive control system and traditional Smith forecast control system. The simulation results show that, the design of PIDGPC control algorithm solved the problem of large fluctuation of over heated water temperature, the problem of control delay and the problem of overshoot. Through controlling the temperature of deaerating heating device, it increases the tire production efficiency, prolongs life of devices, reduces the maintenance work of production and finally realized energy saving and consumption reduction.