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Dual-Mode Based Sliding Mode Control Approach for Nonlinear Chemical Processes

[Image: see text] This paper synthesizes a new sliding mode controller (SMC) approach to enhance tracking and regulation tasks by following dual-mode concepts. The new control law consists of two distinct types of operation, using the combination of higher gain to large error signals (transient) and...

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Autores principales: Obando, Camila, Rojas, Ruben, Ulloa, Francisco, Camacho, Oscar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10018495/
https://www.ncbi.nlm.nih.gov/pubmed/36936305
http://dx.doi.org/10.1021/acsomega.2c08201
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author Obando, Camila
Rojas, Ruben
Ulloa, Francisco
Camacho, Oscar
author_facet Obando, Camila
Rojas, Ruben
Ulloa, Francisco
Camacho, Oscar
author_sort Obando, Camila
collection PubMed
description [Image: see text] This paper synthesizes a new sliding mode controller (SMC) approach to enhance tracking and regulation tasks by following dual-mode concepts. The new control law consists of two distinct types of operation, using the combination of higher gain to large error signals (transient) and lower gain to small error signals (the region around the set point). The design is presented from a dual-mode (PD–PID) sliding surface operating in concert, fulfilling desired control objectives to ensure stability and performance. Therefore, a new controller was established, and we called it a dual-mode based SMC. The proposed controller is tested by computer simulations applied to two nonlinear processes, a continuous stirred-tank reactor (CSTR) and a mixing tank with a variable dead time. The results are compared with two different alternatives of SMC. In addition, the merits and drawbacks of the control schemes are analyzed using radial graphs, comparing the control methods with various performance measures for set points and disturbances changes. The ITSE (integral of time multiplied by the squared error), TVu (total variation of control effort) indices, Mp (maximum overshoot), and ts (settling time) were the indices used for performance analysis and comparisons.
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spelling pubmed-100184952023-03-17 Dual-Mode Based Sliding Mode Control Approach for Nonlinear Chemical Processes Obando, Camila Rojas, Ruben Ulloa, Francisco Camacho, Oscar ACS Omega [Image: see text] This paper synthesizes a new sliding mode controller (SMC) approach to enhance tracking and regulation tasks by following dual-mode concepts. The new control law consists of two distinct types of operation, using the combination of higher gain to large error signals (transient) and lower gain to small error signals (the region around the set point). The design is presented from a dual-mode (PD–PID) sliding surface operating in concert, fulfilling desired control objectives to ensure stability and performance. Therefore, a new controller was established, and we called it a dual-mode based SMC. The proposed controller is tested by computer simulations applied to two nonlinear processes, a continuous stirred-tank reactor (CSTR) and a mixing tank with a variable dead time. The results are compared with two different alternatives of SMC. In addition, the merits and drawbacks of the control schemes are analyzed using radial graphs, comparing the control methods with various performance measures for set points and disturbances changes. The ITSE (integral of time multiplied by the squared error), TVu (total variation of control effort) indices, Mp (maximum overshoot), and ts (settling time) were the indices used for performance analysis and comparisons. American Chemical Society 2023-03-01 /pmc/articles/PMC10018495/ /pubmed/36936305 http://dx.doi.org/10.1021/acsomega.2c08201 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Obando, Camila
Rojas, Ruben
Ulloa, Francisco
Camacho, Oscar
Dual-Mode Based Sliding Mode Control Approach for Nonlinear Chemical Processes
title Dual-Mode Based Sliding Mode Control Approach for Nonlinear Chemical Processes
title_full Dual-Mode Based Sliding Mode Control Approach for Nonlinear Chemical Processes
title_fullStr Dual-Mode Based Sliding Mode Control Approach for Nonlinear Chemical Processes
title_full_unstemmed Dual-Mode Based Sliding Mode Control Approach for Nonlinear Chemical Processes
title_short Dual-Mode Based Sliding Mode Control Approach for Nonlinear Chemical Processes
title_sort dual-mode based sliding mode control approach for nonlinear chemical processes
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10018495/
https://www.ncbi.nlm.nih.gov/pubmed/36936305
http://dx.doi.org/10.1021/acsomega.2c08201
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