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Robust Wireless Sensor and Actuator Networks for Networked Control Systems.

Bongsang Park1, Junghyo Nah2, Jang-Young Choi3

  • 1Department of Radio and Information Communications Engineering, Chungnam National University, Daejeon 34134, Korea. bong4ang@cnu.ac.kr.

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Summary

This study introduces a robust wireless sensor and actuator network (R-WSAN) to ensure control system stability despite network failures. R-WSAN enhances resilience by sharing control tasks among nodes, maintaining performance.

Keywords:
clusteringjoint designrobustnessschedulingwireless networked control systemswireless networks

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Area of Science:

  • Control Systems Engineering
  • Wireless Networking
  • Networked Control Systems

Background:

  • Wireless networked control systems (WNCs) face stability challenges due to complex interactions and network faults like link/node failures.
  • Ensuring reliable control performance in dynamic wireless environments remains a significant hurdle.

Purpose of the Study:

  • To propose a robust wireless sensor and actuator network (R-WSAN) architecture.
  • To maintain control stability for multiple plants despite spatial-temporal network variations and faults.

Main Methods:

  • A joint design protocol integrating distributed control with wireless network schemes (clustering, resource scheduling, task sharing).
  • Implementation of a hierarchical cluster-based network structure.
  • Decoupling control tasks from unreliable nodes and enabling task sharing.

Main Results:

  • R-WSAN demonstrates enhanced resilience against network faults affecting sensing and actuation.
  • The proposed system maintains control performance without significant disruption.
  • Simulations validate the effectiveness of the R-WSAN design.

Conclusions:

  • R-WSAN effectively addresses the stability challenges in wireless networked control systems.
  • The joint design protocol enhances system robustness and fault tolerance.
  • This approach offers a promising solution for reliable control in wireless environments.