Variable Discourse of Universe Fuzzy-PID Temperature Control System for Vacuum Smelting Based on PLC

In view of the vacuum smelting process temperature control for existence of non-linear big lag and the poor accuracy and so on. a kind of variable discourse of universe fuzzy-PID (PID-proportional integral derivative) high precision controller is designed, realization of this way based on Matlab/Simulink simulation and PLC(PLC-Programmable logic Controller) is provided, the new fuzzy-PID controller has fast response and no overshoot, which achieves on-line coordination of PID parameters and increases the accuracy of temperature control.