Discrete-Time Inverted Decoupling Internal Model Control of Multivariable Systems Based on Improved Fractional-Order Butterworth Filter

Discrete-Time Inverted Decoupling Internal Model Control of Multivariable Systems Based on Improved Fractional-Order Butterworth Filter

A novel discrete-time inverted decoupling internal model control (IMC) strategy is proposed for discrete-time multivariable systems with time-delays and RHP zeros. The strategy integrates an improved fractional-order Butterworth filter (FOBF) into the control framework. Key contributions include the...

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Bibliographic Details
Main Authors: Kaiyue Liu, Shuke Lyu, Rui Wang, Chenkang Gao, Xiangyu Yang, Yongtao Liu
Format: Article
Language:English
Published: IEEE 2025-01-01
Series:IEEE Access
Subjects:
Internal model control
butterworth filter
discrete-time control
inverted decoupling
multivariable system
process control
Online Access:https://ieeexplore.ieee.org/document/11124857/
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Summary:A novel discrete-time inverted decoupling internal model control (IMC) strategy is proposed for discrete-time multivariable systems with time-delays and RHP zeros. The strategy integrates an improved fractional-order Butterworth filter (FOBF) into the control framework. Key contributions include the design of a high-order improved FOBF by cascading stable fractional-order and integer-order filters, guaranteeing stability through W-plane mapping analysis, and developing an efficient direct discretization method based on frequency response matching. Simulation examples demonstrate the controller’s effectiveness in enhancing tracking performance and robustness against disturbances and model uncertainties.
ISSN:2169-3536

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