Comparison of PID Dead-Time Compensators for Industrial Systems using Smith-Rule

A dead-time is usually associated with input and output of industrial control systems. This dead-time is not fixed during the process function so conventional PID controller cannot be designed using normal methods. An adaptive scheme is designed to control systems using the prediction method of Smith Adaptive Rule. The paper gives the comparative study between the normal smith predictor(SP); modified smith predictor(MSP) and flexible smith predictor(FSP) based on their performance ; robustness and stability using magnitude optimum multiple integration (MOMI) Controller Tuning method in MATLAB-SIMULINK. A MATLAB program with an objective is written to find out the optimum value for the PI controller parameter to maintain robustness and removal of dead time effect from system.