Zainal, Azavitra and Wahab, Norhaliza Abdul and Yusof, Mohd Ismail and Razali, Mashitah Che (2024) Identification of first order plus dead time for a pH neutralization process using open loop test. In: 22nd Asia Simulation Conference, AsiaSim 2023, 25 October 2023 through 26 October 2023, Langkawi.
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Identification of First Order Plus Dead Time for a pH Neutralization Process Using Open Loop Test.pdf Restricted to Registered users only Download (1MB) |
Abstract
In this paper, a systematic method for determining the mathematical model for the pH neutralization process is proposed by applying system iden- tification techniques to the controller design requirements. The identification is conducted experimentally using an actual pilot plant and analysis is performed using MATLAB toolbox for system identification. The identification is based on the first order plus dead time (FOPDT) method and subsequent application of model estimation and validation tests. In this study, pH is a controlled variable and alkali dosing pump stroke rate is a manipulated variable. The acid dosing pump stroke rate is fixed at 10%. Four open-loop step response experiments were conducted in which the alkali dosing pump stroke rate was set at 30% (Set A), 40% (Set B), 50% (Set C), and 60% (Set D). Based on the best fit performance criteria, Set B, Set C and Set D show approximately the same results. Frequency response analysis was performed using Bode plot and Nyquist diagram to deter- mine the stability. The results show that Set B is more stable than Set C and Set D. The stability criterion is important because the obtained FOPDT model is used for controller design.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Uncontrolled Keywords: | First order plus dead time, Palm oil mill effluent, pH neutralization, System Identification |
| Divisions: | Faculty of Electrical Engineering |
| Depositing User: | Norhairol Khalid |
| Date Deposited: | 05 Jun 2025 08:18 |
| Last Modified: | 05 Jun 2025 08:18 |
| URI: | http://eprints.utem.edu.my/id/eprint/28740 |
| Statistic Details: | View Download Statistic |
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