Author(s)

Hina Shahid, Sadia Murawwat, Intesar Ahmed, Sana Naseer, Rukhsar Fiaz, Ayesha Afzaal, Shumaila Rafiq

Electrical Engineering Department, Lahore College for Women University, Lahore, Pakistan.

In industrial process control, fluid level control is one of the most basic aspects. Many control methods such as on-off, linear and PID (Proportional Integral Derivative) were developed time by time and used for precise controlling of fluid level. Due to flaws of PID controller in non-linear type processes such as inertial lag, time delay and time varying etc., there is a need of alternative design methodology that can be applied in both linear and non-linear systems and it can be execute with fuzzy concept. By using fuzzy logic, designer can realize lower development cost, superior feature and better end product. In this paper, level of fluid in tank is control by using fuzzy logic concept. For this purpose, a simulation system of fuzzy logic controller for fluid level control is designed using simulation packages of MATLAB software such as Fuzzy Logic Toolbox and Simulink. The designed fuzzy logic controller first takes information about inflow and outflow of fluid in tank than maintain the level of fluid in tank by controlling its output valve. In this paper, a controller is designed on five rules using two-input and one-output parameters. At the end, simulation results of fuzzy logic based controller are compared with classical PID controller and it shows that fuzzy logic controller has better stability, fast response and small overshoot.

PID Controller, Fuzzy Logic Controller, FIS, MATLAB

Shahid, H. , Murawwat, S. , Ahmed, I. , Naseer, S. , Fiaz, R. , Afzaal, A. and Rafiq, S. (2016) Design of a Fuzzy Logic Based Controller for Fluid Level Application. World Journal of Engineering and Technology, 4, 469-476. doi: 10.4236/wjet.2016.43047.