Designing a Controller for Two Tank Interacting System

The control of liquid level in tank system and flow between tanks is main problem in process industries like petroleum refineries, chemical, paper industries, water treatment industries. The control of liquid level and flow between tanks which is must be controlled. The control of level of tank in the interacting system is the major task. As in the interacting process dynamics the dynamics of tank 1 affects the dynamics of tank 2 and vice versa. For the study purpose two tank interacting level process is considered. While simulating in MATLAB it is observed that 1. In PI controller, the offset is removed but makes the system response slow.2. In PID controller the system response is fast but there are oscillations and overshoot.3. In Fuzzy Control Logic the performance is without overshoot, Faster settling time, Better set-point tracking and very minimum steady state error.