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A comparative study of applying active-set and interior point methods in MPC for controlling nonlinear pH process


Citation

S., Syafiie and Chia, Yaw Kwan (2014) A comparative study of applying active-set and interior point methods in MPC for controlling nonlinear pH process. Jurnal Rekayasa Kimia dan Lingkungan, 10 (1). pp. 15-24. ISSN 1412-5064; ESSN: 2356-1661

Abstract

A comparative study of Model Predictive Control (MPC) using active-set method and interior point methods is proposed as a control technique for highly non-linear pH process. The process is a strong acid-strong base system. A strong acid of hydrochloric acid (HCl) and a strong base of sodium hydroxide (NaOH) with the presence of buffer solution sodium bicarbonate (NaHCO3) are used in a neutralization process flowing into reactor. The non-linear pH neutralization model governed in this process is presented by multi-linear models. Performance of both controllers is studied by evaluating its ability of set-point tracking and disturbance-rejection. Besides, the optimization time is compared between these two methods; both MPC shows the similar performance with no overshoot, offset, and oscillation. However, the conventional active-set method gives a shorter control action time for small scale optimization problem compared to MPC using IPM method for pH control.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Publisher: Chemical Engineering Department, College of Engineering, Syiah Kuala University
Keywords: Model predictive control; Active-set method; Interior point method; pH neutralization process
Depositing User: Nabilah Mustapa
Date Deposited: 06 Sep 2017 09:18
Last Modified: 06 Sep 2017 09:18
URI: http://psasir.upm.edu.my/id/eprint/56931
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