Internal Model Control Design Based on Equal Order Fractional Butterworth Filter for Multivariable Systems

An internal model control with inverted decoupling (ID-IMC) controller design method based on equal fractional Butterworth (EFBW) filter is proposed for Multiple Input-Multiple Output (MIMO) systems with multiple time delays and Right Half Plane (RHP) zeros. There has been finite memory and limited...

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Main Authors: Kaiyue Liu, Juan Chen
Format: Article
Language:English
Published: IEEE 2020-01-01
Series:IEEE Access
Subjects:
Online Access:https://ieeexplore.ieee.org/document/9086817/
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author Kaiyue Liu
Juan Chen
author_facet Kaiyue Liu
Juan Chen
author_sort Kaiyue Liu
collection DOAJ
description An internal model control with inverted decoupling (ID-IMC) controller design method based on equal fractional Butterworth (EFBW) filter is proposed for Multiple Input-Multiple Output (MIMO) systems with multiple time delays and Right Half Plane (RHP) zeros. There has been finite memory and limited flexibility for multivariable processes developed using a direct ID-IMC method. This paper presents a novel procedure to approximate Butterworth (BW) filters using fractional-order (FO) theories, so that the degree-of-freedom for tunable parameters is increased. The proposed ID-IMC controller cascaded with EFBW filter combines the computational simplicity of the ID-IMC structure with the greater flexibility of the EFBW filter, in conjunction with a better set-point tracking and disturbance rejection performance. Further, the stability analysis of the designed controller is given to ensure the stability of the closed-loop system. Dynamic performance indicators and sensitivity functions are carried out for the time domain and robustness analysis. Two illustrative examples are presented to show the merits of the proposed method.
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spelling doaj.art-cb9b8980f14c4af6af73e7ff844cc7732022-12-21T19:59:37ZengIEEEIEEE Access2169-35362020-01-018846678467910.1109/ACCESS.2020.29925989086817Internal Model Control Design Based on Equal Order Fractional Butterworth Filter for Multivariable SystemsKaiyue Liu0https://orcid.org/0000-0003-4586-6628Juan Chen1College of Information Science and Technology, Beijing University of Chemical Technology, Beijing, ChinaCollege of Information Science and Technology, Beijing University of Chemical Technology, Beijing, ChinaAn internal model control with inverted decoupling (ID-IMC) controller design method based on equal fractional Butterworth (EFBW) filter is proposed for Multiple Input-Multiple Output (MIMO) systems with multiple time delays and Right Half Plane (RHP) zeros. There has been finite memory and limited flexibility for multivariable processes developed using a direct ID-IMC method. This paper presents a novel procedure to approximate Butterworth (BW) filters using fractional-order (FO) theories, so that the degree-of-freedom for tunable parameters is increased. The proposed ID-IMC controller cascaded with EFBW filter combines the computational simplicity of the ID-IMC structure with the greater flexibility of the EFBW filter, in conjunction with a better set-point tracking and disturbance rejection performance. Further, the stability analysis of the designed controller is given to ensure the stability of the closed-loop system. Dynamic performance indicators and sensitivity functions are carried out for the time domain and robustness analysis. Two illustrative examples are presented to show the merits of the proposed method.https://ieeexplore.ieee.org/document/9086817/Butterworth filterfractional order systeminternal model controlMIMO systems
spellingShingle Kaiyue Liu
Juan Chen
Internal Model Control Design Based on Equal Order Fractional Butterworth Filter for Multivariable Systems
IEEE Access
Butterworth filter
fractional order system
internal model control
MIMO systems
title Internal Model Control Design Based on Equal Order Fractional Butterworth Filter for Multivariable Systems
title_full Internal Model Control Design Based on Equal Order Fractional Butterworth Filter for Multivariable Systems
title_fullStr Internal Model Control Design Based on Equal Order Fractional Butterworth Filter for Multivariable Systems
title_full_unstemmed Internal Model Control Design Based on Equal Order Fractional Butterworth Filter for Multivariable Systems
title_short Internal Model Control Design Based on Equal Order Fractional Butterworth Filter for Multivariable Systems
title_sort internal model control design based on equal order fractional butterworth filter for multivariable systems
topic Butterworth filter
fractional order system
internal model control
MIMO systems
url https://ieeexplore.ieee.org/document/9086817/
work_keys_str_mv AT kaiyueliu internalmodelcontroldesignbasedonequalorderfractionalbutterworthfilterformultivariablesystems
AT juanchen internalmodelcontroldesignbasedonequalorderfractionalbutterworthfilterformultivariablesystems