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Dealing with network complexity in real-time networked control

Tian, Yu-Chu & Levy, David (2008) Dealing with network complexity in real-time networked control. International Journal of Computer Mathematics, 85(8), pp. 1235-1253.

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Abstract

This paper addresses complex real-time networked control systems (NCSs). From our recent effort in this area, a general framework is developed to deal with network complexity. When the complex traffic of real-time NCSs are treated as stochastic and bounded variables, simplified yet improved methods for robust stability and control synthesis can be developed to guaranteed the stability of the systems. From the perspective of network design, over-provisioning of network capacity is not a general solution as it cannot provide any guarantee for predictive communication behaviour, which is a basic requirement for many real-time applications. Co-design of network and control is an effective approach to simplify the network behaviour and consequently to maximise the performance of the overall NCSs. To implement such a co-design, a queuing protocol is applied to obtain predictable network traffic behaviour. Then, the predictable network-induced delay is compensated through the controller design, and any dropped control packet is also estimated in real-time using past control packets. In this way, the network-induced delay can be limited within a single control period, significantly simplifying the network complexity as well as system analysis and design.

Impact and interest:

16 citations in Scopus
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13 citations in Web of Science®

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Full-text downloads:

161 since deposited on 18 Aug 2008
14 in the past twelve months

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ID Code: 14403
Item Type: Journal Article
Keywords: Complex networks, Real, time systems, Networked control systems, Queuing protocol, packet dropout
DOI: 10.1080/00207160701697354
ISSN: 0020-7160
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Power and Energy Systems Engineering (excl. Renewable Power) (090607)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > COMMUNICATIONS TECHNOLOGIES (100500) > Computer Communications Networks (100503)
Australian and New Zealand Standard Research Classification > MATHEMATICAL SCIENCES (010000) > APPLIED MATHEMATICS (010200) > Calculus of Variations Systems Theory and Control Theory (010203)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2008 Taylor and Francis
Copyright Statement: This is an electronic version of an article published in [International Journal of Computer Mathematics 85(8):pp. 1235-1253]. [International Journal of Computer Mathematics] is available online at informaworldTM with http://dx.doi.org/10.1080/00207160701697354
Deposited On: 18 Aug 2008
Last Modified: 29 Feb 2012 23:47

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