PID Control Performance Improvement for a Liquid Level System using Parameter Design

Year 2016, Special Issue (2016), 98 - 103, 01.12.2016

Barış Şimşek , Gözde Ultav Arda Küçük Tansel İç

https://doi.org/10.18100/ijamec.267185

Cited By: 3

Abstract

In this study, it is aimed to reduce the variability of parameters in
the liquid level system controlled by PID controller for a laboratory scale
device. An integrated methodology consisting of experimental design and feedback
PID (proportional-integral-derivative) controller was proposed to optimize and
control the deviation from the average value in the offset value, variability
in the offset value and the time to reach the set value in this liquid level
system. The optimal valve opening levels that minimizes the average of the
offset value (µ), variance (s²) and the first time to reach the set
value (t) were determined as 40%, 5%, 50% and 80%, respectively, using TOPSIS
(Technique for Order Preference by Similarity to an Ideal Solution)-based
Taguchi method by Minitab®. A quite successful control was established in the
verification test which performed with specified levels of optimal valve
opening. Recovery rates in the control performance before and after optimizing
the parameter were calculated as 9.53% in the deviation from the average value
in the offset values, 29.37% in the variability in the offset value and 11.27%
in the time to reach the set value. MATLAB/Simulink was used to simulate the
liquid level system.

Keywords

Laboratory Scale Liquid Level System, TOPSIS based Taguchi Parameter Design

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