DESIGN OF CENTRALIZED CONTROLLERS FOR A MSF DESALINATION PLANT

This work presents a simulation application study on the design of cen tralized PI controllers for a MSF desalination plant. Various design m ethods based on the transfer function matrix of the plant are consider ed. The methods include (1) the Davison method, (2) the Maciejowski me thod, (3) the decoupler design and (4) the Tanttu and Lieslehto method . The performance of the closed loop system for a step change in the s et point is compared. The robustness of the controlled system for unce rtainties in the system steady-state gains is also evaluated.