Optimal PID control with anti-windup in neutralization process

Year 2023, Volume: 7 Issue: 3, 138 - 145, 15.12.2023

Zeynep Yilmazer Hitit İsmet Koçer Gökçe Kuş Nermin Zeynep Arslan Elif Pınar Dal Habipcan Koz

https://doi.org/10.35860/iarej.1256107

Abstract

PID control, which is a type of automation, was used to ensure that neutralization takes place in a controlled manner. To determine the PID parameters of the system with the Cohen-Coon tuning method, two different dynamic experiments were carried out for pH and temperature in the first stage, and the transfer function and model parameters were found. In the experiment carried out for the pH variable; time constant (τ) is 59 s, dead time (Ɵ) is 261 s and steady state gain (K) is read from the graph as 14,72, while PID parameters are calculated as KC =0.0375, τI =315.759 s and τD =52.601 s. Likewise, while τ=1402 s., Ɵ= 88 s, and K=-6 were read for the temperature variable, the PID parameters were calculated as KC =6.196, τI =47.23 s, and τD =-19.20 s. The determined controller parameters were used as initial parameters and simulated using the S-function block via MATLAB (2007b). The pH set range was coded as 6.5-8.5 and Tset for temperature was coded as 22 °C. As a result of the oscillation observed due to the nature of the PID control parameters that are intended to be controlled, the safe operation of the process and the desired set values are ensured. When the obtained PID controller parameters were applied to the neutralization reaction, the PID control successfully controlled the reactor temperature and pH and eliminated possible hazards in operation. Anti-windup provides better control rather than traditional PID control method.

Keywords

Anti-windup, Automation, Neuralization, PID controller, Process control

Supporting Institution

Ankara University and the Scientific and Technological Research Council of Turkey (TÜBİTAK)

Project Number

1919B012005917

Thanks

This study was supported by Ankara University and the Scientific and Technological Research Council of Turkey (TÜBİTAK) 2209-A University Students Research Projects Support Program with project number 1919B012005917.

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