Distributed Control of an Ill-Conditioned Non-Linear Process Using Control Relevant Excitation Signals
Name
processes-11-03320.pdf
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1.27 MB
Format
Adobe PDF
Checksum (MD5)
c9a3888de27e31ffdb8b570bbcb7a29e
Author(s)
Sha’aban, Yusuf Abubakar
Date Issued
November 29, 2023
Publisher
MDPI AG
Citation
Sha’aban, Y.A. Distributed Control of an Ill-Conditioned Non-Linear Process Using Control Relevant Excitation Signals. Processes 2023, 11, 3320.
Version
Final published version
Abstract
Efficient control schemes for ill-conditioned systems, such as the high-purity distillation column, can be challenging and costly to design and implement. In this paper, we propose a distributed control scheme that utilizes well-designed excitation signals to identify the system. Unlike traditional systems, we found that a summation of correlated and uncorrelated signals can yield better excitation of the plant. Our proposed distributed model predictive control (MPC) scheme uses a shifted input sequence to address loop interactions and reduce the computational load. This approach deviates from traditional schemes that use iteration, which can increase complexity and computational load. We initially tested the proposed method on the linear model of a highly coupled 2 × 2 process and compared its performance with decentralized proportional-integral-derivative (PID) controllers and centralized MPC. Our results show improved performance over PID controllers and similar results to centralized MPC. Furthermore, we compared the performance of the proposed approach with a centralized MPC on a nonlinear model of a distillation column. The results for the second study also demonstrated comparable performance between the two controllers with the decentralised control slightly outperforming the centralised MPC in some cases. These findings are promising and may be of interest to practitioners that are more comfortable with tuning decentralised loops.
Subjects
Process Chemistry and Technology
Chemical Engineering (miscellaneous)
Bioengineering
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.3390/pr11123320
