Tuning of PID controllers for unstable first-order plus dead time systems
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Jianyu Bi
,
Wen Tan
Abstract
In this paper, proportional-integral-derivative (PID) controllers are tuned for unstable first-order plus dead time (UFOPDT) systems. Genetic algorithm (GA) is used to find the parameters of the PID controller for UFOPDT systems under the constraint of robustness measure. By curve fitting, the controller parameters are expressed as the functions of the UFOPDT model parameters. Two tuning formulas which consider robustness and the tradeoff between disturbance rejection and robustness of the closed-loop system are proposed. The proposed tuning formulas extend the application range of the existing methods and simulation results show that the tuned PID controllers can achieve good performance for UFOPDT systems.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: None declared.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Articles in the same Issue
- Frontmatter
- Research Articles
- Tuning of PID controllers for unstable first-order plus dead time systems
- Oxygen excess ratio control of PEM fuel cell: fractional order modeling and fractional filter IMC-PID control
- Proposal and energy/exergy/economic analyses of a smart heat recovery for distillation tower of the Naphtha Hydrotreating Unit of the Petrochemical Plant; designing a low-carbon plant
- Three-dimensional CFD study on thermo-hydraulic behaviour of finned tubes in a heat exchange system for heat transfer enhancement
- A simulation and thermodynamic improvement of the methanol production process with economic analysis: natural gas vapor reforming and utilization of carbon capture
- Optimization of hydrogel composition for effective release of drug
- Mathematical modelling of water-based biogas scrubber operating at digester pressure
- COCO, a process simulator: methane oxidation simulation & its agreement with commercial simulator’s predictions
- Hydrodynamics of shear thinning fluid in a square microchannel: a numerical approach
- Parameter estimation in non-linear chemical processes: an opposite point-based differential evolution (OPDE) approach
