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Performance Comparison between PI and MRAC for Coupled-Tank System

M. Saad, A. Albagul, and Y. Abueejela
College of Electronic Technology, Libya
College of Electronic Technology/ Bani-walid, Libya
Abstract—Liquid level control is mostly used in most of the industries where liquid level and flow control are essential. This paper introduces the approach of modeling and control of liquid level control system for a Coupled-Tank System. First, this paper shows mathematical equations for the nonlinear system. Then it presents the linearized model for the proposed system. Two controllers of the system based on the conventional Proportional plus Integral (PI) controller and Model Reference Adaptive Control (MRAC) technique are used, to control the level of the second tank for the linearized model, through variable manipulation of water pump in the first tank. Finally, the simulation study is done, which demonstrates that the MRAC controller produces better response compared to the PI controller.

Index Terms—coupled-tank system, modeling, PI controller, MRAC

Cite: M. Saad, A. Albagul, and Y. Abueejela, "Performance Comparison between PI and MRAC for Coupled-Tank System," Jounal of Automation and Control Engineering, Vol. 2, No. 3, pp. 316-321, September, 2014. doi: 10.12720/joace.2.3.316-321
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