The Application Of Robustness Control And IMC Control To The Polyethylene Uints

Polyethylene units are indispensable for alkene plants and their normalperformance is vital to regular operation of the overall plant. This is a complicatedprocedure of transferring heat and mass with complex mechanism, and it requires veryhigh control quality. With traditional PID controller, the ideal requirement of controlcannot be met easily. Under the unchanged condition of prime equipment, the advancedprocess control measures such as optimization control and advanced process control aretaken and implemented in this paper, and the rate of production has been improved bythis means and the stable production process is guaranteed. NLJ optimization algorithm can be used in the closed-loop system to identifyparameters of the model and tune parameters of the PID controller. With this algorithm,optimization control is achieved and optimal results are provided for operators. With the theory of IMC and its feature of designing, IMC-PID advanced processcontrol is designed for tuning of parameters of traditional PID controller and filter. Byusing such means, advanced process can realize the strong robustness and excellentcontrol performance of the controller. It is also studied how to use vc++ to develop the software. It is a system to identifyparameters of the model,design IMC and filter, Under this development environment,the program seems more directly perceived, more attractive and more efficient.