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Dual-loop PID control strategy for ramp tracking and ramp disturbance handling for unstable CSTRs

  • Dipjyoti Das EMAIL logo , Sudipta Chakraborty , Deepak Kumar and G. Lloyds Raja
Published/Copyright: December 5, 2024
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Chemical Product and Process Modeling
From the journal Chemical Product and Process Modeling Volume 19 Issue 6

Abstract

Control strategies designed for step signals fail when applied for ramp tracking and ramp disturbance rejection. Hence, this work presents a novel dual-loop control technique for ramp tracking and ramp disturbance rejection in unstable systems. To begin with, first the unstable process is stabilized using a proportional-derivative (PD) compensator (in the internal loop). This PD compensator was created utilising the direct synthesis approach. Using the loop shaping approach, a proportional-integral-derivative controller (in the outer-loop) is then developed to integrate stabilised plant dynamics. Simulations are done using standard unstable CSTR (Continuous Stirred Tank Reactor) plant models by applying step/ramp reference signals and disturbances. The proposed control strategy shows a satisfactory servo and regulatory response than the existing designs while dealing with step and ramp types of signals. Lastly, a performance summary is also presented on different errors.

Keywords: dual-loop; PID control; frequency loop shaping; unstable dead-time systems; direct synthesis
Corresponding author: Dipjyoti Das, Department of Electronics and Instrumentation Engineering, National Institute of Technology Silchar, Silchar, 788010, Assam, India, E-mail:

  1. Research ethics: No datasets were generated or analyzed during the current study.

  2. Information consent: All the authors have given their consent for this article.

  3. Author contributions: Dipjyoti Das: Formal analysis; writing – original draft; Sudipta Chakraborty: Conceptualization; supervision; G. Lloyds Raja: validation; writing – review and editing. Investigation; resources; software. Deepak Kumar: review and editing.

  4. Use of Large Language Models, AI and Machine Learning Tools: No AI tool is used in this article.

  5. Conflict of interest: The authors declared no potential conflicts of interest concerning the research, authorship, and/or publication of this article.

  6. Research funding: No funding is applicable in this article.

  7. Data availability: Data availability does not apply to this article as no datasets were generated or analyzed during the current study.

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Received: 2024-09-02
Accepted: 2024-11-15
Published Online: 2024-12-05

© 2024 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/cppm-2024-0081
Keywords for this article
dual-loop; PID control; frequency loop shaping; unstable dead-time systems; direct synthesis

Articles in the same Issue

  1. Frontmatter
  2. Research Articles
  3. Comparative study of deterministic and stochastic optimization algorithms applied to the absorption of CO2 by alkanolamine solution
  4. Modeling the kinetics, energy consumption and shrinkage of avocado pear pulp during drying in a microwave assisted dryer
  5. Study of municipal solid waste treatment using plasma gasification by application of Aspen Plus
  6. Numerical analysis of segregation of microcrystalline cellulose powders from a flat bottom silo with various orifice positions
  7. Prediction of syngas production in the gasification process of biomass employing adaptive neuro-fuzzy inference system along with meta-heuristic algorithms
  8. Industrial high saline water desalination by activated carbon in a packed column- an experimental and CFD study
  9. Dual-loop PID control strategy for ramp tracking and ramp disturbance handling for unstable CSTRs
  10. A control perspective on hybrid membrane/distillation propane/propylene separation process
  11. Prediction of surface heating effect on non-equilibrium homogeneous condensation in supersonic nozzle using CFD method
  12. Modeling the emitted carbon dioxide and monoxide gases in the gasification process using optimized hybrid machine learning models
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