Comparative Analysis Of Pid Controller For A Flow Process

Abstract: The art icle proposes an approach to tune the various controllers employed in flo w process. The objective is to maintain the desired flow by means of a float in the rotameter. The process model is identified by step test. Various controller tuning methods like Z-N and IMC are applied to the obtained process model. The results are compared and the best among the two is validated and highlighted through time do main specificat ion. Experimental results confir m that Internal Model Control (IM C) has better performance when co mpared to Ziegler Nichols method (z-n).

Keywords: PID controller, Ziegler-Nichols (Z-N), Internal Model Control (IM C), Flo w Process.