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Article

ISA 100.11a Networked Control System Based on Link Stability

1
Digital Metropolis Institute, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte 59078-900, Brazil
2
Department of Computer Engineering and Automation, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte 59078-900, Brazil
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(18), 5417; https://doi.org/10.3390/s20185417
Received: 30 July 2020 / Revised: 14 August 2020 / Accepted: 19 August 2020 / Published: 21 September 2020
(This article belongs to the Special Issue Industrial Wireless Sensor Networks: Protocols and Applications)
Wireless networked control systems (WNCSs) must ensure that control systems are stable, robust and capable of minimizing the effects of disturbances. Due to the need for a stable and secure WNCS, critical wireless network variables must be taken into account in the design. As wireless networks are composed of several links, factors that indicate the performances of these links can be used to evaluate the communication system in the WNCS. This work presents a wireless network control system composed of ISA 100.11a sensors, a network manager, a controller and a wired actuator. The system controls the liquid level in the tank of the coupled tank system. In order to assess the influence of the sensor link failure on the control loop, the controller calculates the link stability and chooses an alternative link in case of instability in the current link. Preliminary tests of WNCS performance were performed to determine the minimum stability value of the link that generates an error in the control loop. Finally, the tests of the control system based on link stability obtained excellent results. Even with disturbances in the network links, the control system error remained below the threshold. View Full-Text
Keywords: industrial wireless sensor networks; ISA 100.11a; wireless networked control systems; link stability industrial wireless sensor networks; ISA 100.11a; wireless networked control systems; link stability
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MDPI and ACS Style

Florencio, H.; Dória Neto, A.; Martins, D. ISA 100.11a Networked Control System Based on Link Stability. Sensors 2020, 20, 5417. https://doi.org/10.3390/s20185417

AMA Style

Florencio H, Dória Neto A, Martins D. ISA 100.11a Networked Control System Based on Link Stability. Sensors. 2020; 20(18):5417. https://doi.org/10.3390/s20185417

Chicago/Turabian Style

Florencio, Heitor, Adrião Dória Neto, and Daniel Martins. 2020. "ISA 100.11a Networked Control System Based on Link Stability" Sensors 20, no. 18: 5417. https://doi.org/10.3390/s20185417

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