Title: On the effects of time delay variations in the design of networked control system

Authors: Ana Paula Batista; Fábio Gonçalves Jota

Addresses: Graduate Program in Electrical Engineering, Federal University of Minas Gerais, Av. Antônio Carlos 6627, 31270-901, Belo Horizonte, MG, Brazil; Department of Electric Engineering, Federal Center of Technological Education, CEFET-MG, Av. Amazonas 7675, 30.510-000, Belo Horizonte, Brazil ' Graduate Program in Electrical Engineering, Federal University of Minas Gerais, Av. Antônio Carlos 6627, 31270-901, Belo Horizonte, MG, Brazil

Abstract: Networked control system (NCS) is an emerging theme that requires the concurrence of proper tools for representation, analysis and synthesis of controlled feedback systems, aiming at reducing the existing gap between the theoretical achievement and practical applications of NCS. Given that only a few review papers on NCS delays have been published, the objective of this paper is to provide a better understanding of the existing tools for application to real NCSs with random delays. This paper presents a survey on some relevant contributions published in the literature and discusses real application limitations, with emphasis on the varying delay issues. It is highlighted the importance of considering (somehow), in the analysis and synthesis tools, the effects of delays statistics and the probability of uncertain events (present in real NCS) occur (or not).

Keywords: networked control systems; NCSs; variable delays; NCS stability; NCS modelling; NCS design; NCS delays; delay statistics; delay distributions; random access networks; IP networks; control over internet; feedback control; uncertain events; uncertainty probability.

DOI: 10.1504/IJSCC.2013.055981

International Journal of Systems, Control and Communications, 2013 Vol.5 No.2, pp.120 - 139

Received: 07 Feb 2013
Accepted: 21 Apr 2013
Published online: 12 Jul 2014 *

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