COMPARISON OF GA-PID AND FUZZY-PID CONTROLLERS APPLIED TO LIQUID LEVEL STABILITY CONTROL SYSTEM | Thành | TNU Journal of Science and Technology

COMPARISON OF GA-PID AND FUZZY-PID CONTROLLERS APPLIED TO LIQUID LEVEL STABILITY CONTROL SYSTEM

About this article

Received: 28/04/25                Revised: 17/10/25                Published: 20/10/25

Authors

1. Le Minh Thanh Email to author, Vinh Long University of Technology and Education
2. Nguyen Tan No, Vinh Long University of Technology and Education
3. Luong Hoai Thuong, Vinh Long University of Technology and Education
4. Le Tien Dat, University of Cuu Long
5. Nguyen Chi Ngon, Can Tho University

Abstract


In industries such as papermaking, energy, chemicals, water treatment or oil refining, the adjustment and maintenance of stable water levels and water flow require very high precision. Only when the above factors are ensured, the production process can achieve optimal efficiency. Therefore, the challenge is to control the water flow accurately to maintain the stability of the liquid level. This paper proposes two controllers GA-PID and FUZZY-PID, which are used to test real-time control on water tank systems and stabilize liquid flow, comparing with actual application requirements. The GA-PID and FUZZY-PID algorithms are designed to control the stable liquid level, combining the advantages of the Fuzzy and PID algorithms, at the same time, compared with genetic algorithms, to analyze and evaluate the quality indicators of the two controllers. The simulation results on MATLAB/Simulink and the experiment of the two proposed controllers on Arduino Mega microcontroller to stabilize the liquid level with a rise time of about 48s and an error of only 0.2s are suitable for small, flexible, economical applications, and can be easily customized and applied in water treatment systems or paper production in small and medium factories.

Keywords


PID; FUZZY-PID; GA-PID; Discrete control; Water level control

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DOI: https://doi.org/10.34238/tnu-jst.12688

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