Optimal fractional-order series cascade controller design: A refined Bode’s ideal transfer function perspective

In process industries, cascade control is comprehensively used for disturbance attenuation. This manuscript presents the control of the non-minimum phase (NMP) system with dead time via a series cascade scheme. An improved fractional-filter-based control scheme encompassing inverse and dead time com...

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Bibliographic Details
Published in:Transactions of the Institute of Measurement and Control 2024-06, Vol.46 (10), p.1955-1965
Main Authors: Yadav, Manish, Patel, Hirenkumar G, Nagarsheth, Shaival H
Format: Article
Language:English
Subjects:
Cascade control
Closed loops
Compensators
Control systems design
Controllers
Particle swarm optimization
Riemann surfaces
Transfer functions
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Summary:In process industries, cascade control is comprehensively used for disturbance attenuation. This manuscript presents the control of the non-minimum phase (NMP) system with dead time via a series cascade scheme. An improved fractional-filter-based control scheme encompassing inverse and dead time compensators with analytical tuning is proposed. The design hinges on an enhanced Bode’s ideal transfer function, which incorporates delay and NMP zero to deal with the system’s NMP and dead time. Particle swarm optimization (PSO) is utilized to obtain the optimal assessment of fractional filter-based controller settings by minimizing an objective function. Two benchmark problems are presented to test the efficacy of the recommended controller. The Riemann surface and sensitivity examination are used to realize the stability and robustness of the feedback design. Numerical simulations exhibit the superiority of the suggested controller for closed-loop results.
ISSN:0142-3312
1477-0369
DOI:10.1177/01423312231217761