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Differentiation of Level Process Values for Diverse PID Controller Techniques

G.Karpagam, M.Nalini, G.Savithri

The main purport of this paper is to ascertain the best control action for a cylindrical tank level process using PID controllers. A PID controller is the combination of proportional, Integral and derivative control action which possess the ability to reduce the present, past and anticipation of errors. It has the optimal control dynamics of Zero steady state, quick response, no oscillation and higher stability. Initially, the FOPTD with dead time is identified from a real time process using the process modelling of SK method. Various controller tuning methods such as MZN (Modified Ziegler Nichol’s), IMC (Internal Model Control), CHR (Chien Hrones Reswick), ZN (Ziegler Nichol’s) and TL (Tyreus-Luyben) are implemented for this process and based on the examination of time domain specifications and performance error criteria ,the best control action is determined.