Design And Performance Evaluation A Sliding Mode Control Based On The K Observer For A Three Tank Non-Interacting System

Thanh Tung Pham; Chi-Ngon Nguyen

doi:10.6180/jase.202312_26(12).0011

Design And Performance Evaluation A Sliding Mode Control Based On The K Observer For A Three Tank Non-Interacting System

Thanh Tung Pham^{1This email address is being protected from spambots. You need JavaScript enabled to view it.} and Chi-Ngon Nguyen²

¹Faculty of Electrical and Electronic Engineering, Vinh Long University of Technology Education, Vietnam
²College of Engineering Technology, Can Tho University, Vietnam

Received: August 25, 2022
Accepted: December 12, 2022
Publication Date: May 2, 2023

Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.6180/jase.202312_26(12).0011

A sliding mode control (SMC) based on the K observer for a three tank non-interacting system is designed and evaluated in this paper. This system is important in modern process control since it can potentially improve product quality and enhance economic benefits. The SMC controller is designed to ensure that the actual liquid level tracks the desired in a finite time. The K observer is used to estimate the speed and acceleration signal, and realize sliding mode control only by using the position signal. The Lyapunov theory is chosen to prove the stability of the control system. The simulation results of the proposed method in MATLAB/Simulink were compared to an optimal controller tuning of a PI controller based on Skogestad’s tuning method, Cohen coon based tuning and Internal Model Control, an optimal PIDA controller with model uncertainty by Cuckoo Search, a fuzzy logic controller, a PID-Fuzzy logic controller. The comparison results showed that the proposed controller was more effective when the rising time reached 2.1521s, the percent of overshoot was 0%, the steady state error converged to zero, the settling time was 3.8577s.

Keywords: Sliding mode control, K observer, liquid level control, three tank system, MATLAB/Simulink

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