Real Time Fractional-Order Control Technique for Coupled Tank Liquid Level Control Process

Abstract

This paper presents real time fractional-order control technique for a coupled tank liquid level system that often used in industry. First of all system dynamic model has been presented. And then two different control approaches such as the classical proportional-integral-derivative (PID) and fractional-order PI lambda D mu control are used to improve the tracking performance of the coupled tank liquid level system. Design procedures for both controllers are given in detail. Additionally, to verify the effectiveness of the fractional-order PID controller, detailed experimental comparisons with a feedforward proportional integral controller has been realized. It is observed that not only transient but also steady-state error values have been reduced with the aid of the PI lambda D mu controller for tracking control purpose. (C) 2017 The Authors. Published by IASE. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).