Proportional Integral (PI) Controller for a Process Plant System

This paper proposed Proportional; Integral (PI) control strategies for a process plant system using Cohen and Coon and Hagglund-Astron techniques with the Ziegler-Nichols method as a base-line for the tuning of the controllers. The results of the system responses of the designed control schemes were successfully simulated using LABVIEW. Comparing the results showed that controller implemented using the HagglundAstrom method was the best this is because during the simulation exercise, the system under control produced an overshoot of 13% and a settling time of 11.4226 seconds. On the other hand, the system tuned using the Cohen and Coon method has an overshoot of 64% and settling time of 18.9149 seconds which are higher than Hagglund-Astrom and Ziegler-Nichols tuning relations. Keywords—PI Controller; Hagglund-Astrom Method; ZieglerNichols Method; Cohen and Coon method; Process Plant.