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Sensors 2018, 18(8), 2590; https://doi.org/10.3390/s18082590

Protocol for Energy-Efficiency in Networked Control Systems Based on WSN

1
School of Electrical and Computer Engineering, University of Campinas—UNICAMP Campinas, 13083-852 São Paulo, Brazil
2
Department of Electrical and Electronic Engineering, University of the Bío-Bío, Concepción 4081112, Chile
3
Laboratório de Automação e Controle, Universidade de São Paulo—USP, 05508-900 São Paulo, Brazil
*
Authors to whom correspondence should be addressed.
Received: 19 May 2018 / Revised: 30 June 2018 / Accepted: 2 July 2018 / Published: 7 August 2018
(This article belongs to the Section Sensor Networks)
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Abstract

This paper proposes a new communication protocol for output-feedback control through multi-hop Wireless Sensor Network (WSN). The protocol is based on a Hop-by-Hop transport scheme and is especially devised to simultaneously fulfill two conflicting criteria: the network energy consumption and the stability/performance (in terms of H norm) of the closed-loop system. The proposed protocol can be implemented by means of three heuristics, basically using distinct rules to control the maximum number of retransmissions allowed in terms of the voltage level of the batteries of the network nodes. As another contribution, a Markov jump based representation is proposed to model the packet loss in the communication channel, giving rise to a systematic procedure to determine the transition probability matrix and the Markov chain operation modes of a network with multiple information sources. The synthesis of the output-feedback controller is made in two steps (observer filter plus a state-feedback controller) for the Markov model assuming partial availability of the operation modes. The efficiency and applicability of the communication protocol is illustrated by means of a numerical experiment, based on a physical model of a coupled tanks plant. The features of each heuristic of implementation of the proposed protocol are presented in the numerical comparisons. View Full-Text
Keywords: networkedcontrol systems; Wireless Sensor Networks; Hop-by-Hop transport scheme; semi-reliable communication protocol; packet loss networkedcontrol systems; Wireless Sensor Networks; Hop-by-Hop transport scheme; semi-reliable communication protocol; packet loss
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Palma, J.M.; Duran-Faundez, C.; de P. Carvalho, L.; Morais, C.F.; C. L. F. Oliveira, R.; Rubio, E.; Herman, K. Protocol for Energy-Efficiency in Networked Control Systems Based on WSN. Sensors 2018, 18, 2590.

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