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Related Experiment Video

Updated: Jan 30, 2026

Fabrication and Design of Wood-Based High-Performance Composites
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Analytical design based hierarchical control for non-square MIMO wood-chip refining process.

Mingjie Li1, Ping Zhou1

  • 1State Key Laboratory of Synthetical Automation for Process Industries, Northeastern University, Shenyang 110819, China.

ISA Transactions
|January 12, 2019
PubMed
Summary

This study introduces a hierarchical control method for non-square MIMO wood-chip refining. The approach ensures effective process control and optimal operation using a two-layer PID controller design.

Keywords:
Analytical designHierarchical controlLower layer loop controllerMultivariable decoupling controlUpper layer setting controllerWood-chip refining process

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Area of Science:

  • Process Control
  • Chemical Engineering
  • Industrial Automation

Background:

  • Wood-chip refining involves complex non-square MIMO processes.
  • Existing control methods may struggle with the intricacies of these systems.

Purpose of the Study:

  • To develop an analytical hierarchical control method for non-square MIMO wood-chip refining.
  • To enhance the control and operational efficiency of the refining process.

Main Methods:

  • A two-layer hierarchical control scheme is proposed.
  • The lower layer utilizes independent PID controllers for device plants.
  • The upper layer employs centralized PID control with multivariable decoupling and Internal Model Control (IMC), analytically designed using maximum sensitivity (Ms).

Main Results:

  • The proposed method effectively controls the non-square MIMO refining process.
  • Simulation results validate the controller's performance and operational optimization.

Conclusions:

  • The analytical hierarchical control method provides an effective solution for non-square MIMO wood-chip refining.
  • The design methodology ensures robust control and optimal operation through a two-layer PID structure.