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International Journal of Advanced Engineering, Management and Science

A Robust Fuzzy Logic Control of Two Tanks Liquid Level Process

( Vol-2,Issue-5,May 2016 )

Author(s): Kastala Anil Kumar, Ginuga Prabhaker Reddy

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Page No: 288-292
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Fuzzy Logic Controller, MATLAB–Simulink, PID and Two tank Non-interacting level system.


An attempt has been made in this paper to analyze the efficiency of Fuzzy Logic, PID controllers on Non Interacting Two Tanks (Cylindrical) Liquid Level Process. The liquid level process exhibits Nonlinear square root law flow characteristics. The control problem formulated as level in second tank is controlled variable and the inlet flow to the first tank is manipulated variable. The PID Controller is designed based on Internal Model Control (IMC) Method. The Artificial Intelligent Fuzzy logic controller is designed based on six rules with Gaussian and triangular fuzzy sets. MATLAB - Simulink has been used to simulate and verified the mathematical model of the controller. Simulation Results show that the proposed Fuzzy Logic Controller show robust performance with faster response and no overshoot, where as the conventional PID Controller shows oscillations responses for set point changes. Thus, the Artificial Intelligent FLC is founded to give superior performance for a Non linear problem like two tanks. This paper will help the method suitable for research findings concerning on two tank liquid level system.

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