Design and realization of robust disturbance rejection decoupling control strategy for time delayed multi-variable process
Abstract
This paper presents design and development of a robust decentralized PI controller exploiting an analytical model based approach for multi-variable system. In this work, a two-degree-of-freedom control approach is employed to tackle load disturbance rejection, enhance robustness against parametric uncertainties, and ensure precise set-point tracking. Proposed 2-DoF based disturbance rejection decoupling control guarantees robust stability in the face of a ± 40% variation in process gain and delay, while preserving equivalent performance.The robustness of the proposed controller has been verified by sensitivity analysis employing various perturbation levels range of ± 40% . To exhibit the superiority of the proposed controller, three industry-scaled case studies are considered. The obtained response of the proposed controller has been compared with similar other model-based controllers. From the obtained results it is envisaged that, the proposed controller provides adequate servo and regulatory performance as compared to other earlier reported approaches.
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BibTeX
@article{maniramakrishna2026design,
title = {{Design and realization of robust disturbance rejection decoupling control strategy for time delayed multi-variable process}},
author = {A. Maniramakrishna and Soumya Ranjan Mahapatro},
journal = {Scientific Reports},
year = {2026},
month = oct,
doi = {10.1038/s41598-026-71964-7},
url = {https://www.nature.com/articles/s41598-026-71964-7},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Design and realization of robust disturbance rejection decoupling control strategy for time delayed multi-variable process
AU - A. Maniramakrishna
AU - Soumya Ranjan Mahapatro
PY - 2026
DA - 2026/10/01
JO - Scientific Reports
DO - 10.1038/s41598-026-71964-7
UR - https://www.nature.com/articles/s41598-026-71964-7
AB - This paper presents design and development of a robust decentralized PI controller exploiting an analytical model based approach for multi-variable system. In this work, a two-degree-of-freedom control approach is employed to tackle load disturbance rejection, enhance robustness against parametric uncertainties, and ensure precise set-point tracking. Proposed 2-DoF based disturbance rejection decoupling control guarantees robust stability in the face of a ± 40% variation in process gain and delay, while preserving equivalent performance.The robustness of the proposed controller has been verified by sensitivity analysis employing various perturbation levels range of ± 40% . To exhibit the superiority of the proposed controller, three industry-scaled case studies are considered. The obtained response of the proposed controller has been compared with similar other model-based controllers. From the obtained results it is envisaged that, the proposed controller provides adequate servo and regulatory performance as compared to other earlier reported approaches.
SN - 2045-2322
ER -