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Tracking performance for NCSs with multi-communication constraints.

Junwei Hu1, Xisheng Zhan2, Xiaowei Jiang3

  • 1School of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; School of Electrical Engineering and Automation, Hubei Normal University, Huangshi 435002, China.

ISA Transactions
|September 18, 2022
PubMed
Summary
This summary is machine-generated.

This study analyzes multiple input multiple output (MIMO) networked control systems (NCSs) under communication constraints. Results show two-degree of freedom controllers outperform one-degree of freedom controllers for improved tracking performance.

Keywords:
Multi-communication constraintsTracking performanceTwo degree of freedom controllerUnstable poles

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Area of Science:

  • Control Systems Engineering
  • Networked Systems
  • Signal Processing

Background:

  • Networked Control Systems (NCSs) integrate control theory with communication networks.
  • Multiple Input Multiple Output (MIMO) systems enhance data throughput and reliability.
  • Communication constraints significantly impact NCS performance.

Purpose of the Study:

  • To investigate the tracking performance of MIMO NCSs considering various communication constraints.
  • To analyze the influence of network-induced factors and basic communication limitations.
  • To compare the effectiveness of one-degree of freedom (1DOF) and two-degree of freedom (2DOF) controllers.

Main Methods:

  • Utilizing inner-outer factorization and Youla parameterization for controller design.
  • Deriving mathematical expressions for controller performance under constraints.
  • Simulating various communication constraint scenarios.

Main Results:

  • Network constraints and system characteristics differentially affect plant tracking performance.
  • Packet loss, network delay, bandwidth, encoding-decoding, and noise were quantified.
  • The two-degree of freedom (2DOF) controller demonstrated superior tracking performance compared to the 1DOF controller.

Conclusions:

  • The 2DOF controller offers enhanced tracking performance in MIMO NCSs with communication constraints.
  • Understanding the impact of individual constraints is crucial for system optimization.
  • Simulation results validate the theoretical analysis of controller performance.