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Embedded fuzzy sliding mode control for polymer extrusion process.

Abdelhamied S Shaalan1, Ahmad M El-Nagar2, Mohammad El-Bardini2

  • 1Factory manager at Misr for Plastic Products Co. (MPPC), Sadat City, Egypt.

ISA Transactions
|April 3, 2020
PubMed
Summary
This summary is machine-generated.

This study presents a fuzzy sliding mode control (FSMC) for polymer extrusion (PE) machines, addressing feeding rate instability. The novel FSMC enhances control robustness and reduces chattering, demonstrating superior performance over traditional methods.

Keywords:
Embedded controllerFuzzy logic systemsLyapunov theoremNonlinear controlSliding mode control

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Area of Science:

  • Control Systems Engineering
  • Polymer Processing
  • Industrial Automation

Background:

  • Polymer extrusion (PE) processes are prone to instability due to feeding rate variations.
  • Existing control methods may struggle with the inherent uncertainties and perturbations in PE.
  • Chattering and lack of robustness are common challenges in PE control.

Purpose of the Study:

  • To develop and implement a robust fuzzy sliding mode control (FSMC) for polymer extrusion machines.
  • To improve the stability and performance of PE processes affected by unsteady feeding rates.
  • To evaluate the effectiveness of FSMC against other control algorithms.

Main Methods:

  • Derivation of a proportional-integral (PI) sliding surface for FSMC.
  • Implementation of a fuzzy inference system (FIS) for reaching control to enhance robustness and mitigate chattering.
  • Stability analysis using the Lyapunov stability approach.
  • Real-time implementation on a microcontroller kit.
  • Comparative experimental testing against Second Order Sliding Mode Control (SOSMC) and PID controllers.

Main Results:

  • The proposed FSMC demonstrated improved control robustness and effectively reduced the chattering effect.
  • Real-time experimental results validated the practical implementation and effectiveness of the FSMC.
  • Quantitative analysis showed superior performance of FSMC compared to SOSMC and PID algorithms.
  • The FSMC system achieved stable and precise control of the polymer extrusion process.

Conclusions:

  • The developed fuzzy sliding mode control (FSMC) offers an effective solution for controlling uncertain and perturbed polymer extrusion processes.
  • FSMC provides enhanced robustness and eliminates undesirable chattering, outperforming traditional control strategies.
  • The study confirms the viability of FSMC for real-time industrial applications in polymer processing.