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Intermediate Strain Rate Material Characterization with Digital Image Correlation
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ISA 100.11a Networked Control System Based on Link Stability.

Heitor Florencio1, Adrião Dória Neto2, Daniel Martins2

  • 1Digital Metropolis Institute, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte 59078-900, Brazil.

Sensors (Basel, Switzerland)
|September 24, 2020
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Summary
This summary is machine-generated.

This study developed a wireless networked control system (WNCS) using ISA 100.11a sensors that maintains liquid level control despite network link instability. The system adaptively switches links to ensure robust and stable performance.

Keywords:
ISA 100.11aindustrial wireless sensor networkslink stabilitywireless networked control systems

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Area of Science:

  • Control Engineering
  • Wireless Communication Systems
  • Industrial Automation

Background:

  • Wireless networked control systems (WNCSs) require stability and robustness against disturbances.
  • Critical wireless network variables significantly impact WNCS design and performance.
  • Link performance factors are crucial for evaluating WNCS communication systems.

Purpose of the Study:

  • To design and evaluate a WNCS for liquid level control in a coupled tank system.
  • To assess the impact of sensor link failure on the control loop's stability.
  • To implement a controller that adapts to link instability by selecting alternative communication paths.

Main Methods:

  • Developed a WNCS incorporating ISA 100.11a sensors, a network manager, a controller, and a wired actuator.
  • Implemented a controller to monitor link stability and switch to alternative links upon detecting instability.
  • Conducted preliminary tests to identify the minimum link stability threshold causing control loop errors.

Main Results:

  • The WNCS successfully controlled the liquid level in the coupled tank system.
  • The adaptive link selection mechanism effectively mitigated the effects of network link disturbances.
  • Control system errors remained below the established threshold even under network instability.

Conclusions:

  • The proposed WNCS demonstrates excellent performance and robustness in maintaining control loop stability.
  • Adaptive link management is a viable strategy for enhancing the reliability of WNCSs.
  • The system proves effective in real-world applications requiring stable and secure industrial automation.