Abstract
The principal purpose of this design is to present the compose of process control system 、the choice of system hardware、the adjust of PID controller and simulation of system .This design particular pay attention to adjusting PID controller and system simulation .Countering the characteristic that the object throughface time constant is more less in the single loop control system,PI action is selected.we can adopt the experience adjust to the PID controller.This method can avoid the experiment and the calculate which requested in the traditional adjust.This method can save duration,reduce the influence.At last,system conducts simulation.The each property target all quite .