The Application of Self-adaptive Fuzzy PID Controller in Precise Molding System Temperature Control

As temperature system has the characteristic of non-linearity,large inertia and time variability,normal PID and normal fuzzy control can not meet the requirement of precise molding system.A self-adaptive fuzzy PID-controller was designed,which uses fuzzy inference control in large area and PID precision output in small area,adjusts PID parameters based on deviation and the deviation change.A simulation study of the system shows that the controller possesses both the flexible and adaptability advantage of fuzzy controller and the precise character of PID controller.It improves the control effect of precise molding system.