Networked Control Systems: A time-delay approach

Kun Liu, Emilia Fridman, Laurentiu Hetel

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Networked control systems (NCSs) are spatially distributed systems for which the communication between sensors, actuators, and controllers is supported by a shared communication network. This paper gives an overview of the time-delay approach to NCSs. Firstly, the modelling on the Networked Control Systems (NCSs) with one sensor node is recalled. Then, for the NCSs with distributed sensor nodes and Round-Robin (RR) protocol, the closed-loop system can be presented as a switched system with multiple ordered delays. Next, a continuous-time hybrid system model for the closed-loop system, where time-varying delays appear in the dynamics and in the reset equations, is introduced to NCSs under RR and Try-Once-Discard (TOD) protocols. Lastly, the hybrid system modelling for the closed-loop system is extended to the discrete-time case. Differently from other approaches to NCSs in the presence of scheduling protocols (in the frameworks of hybrid and discrete-time systems), the time-delay approach allows the communication delays to be greater than the sampling intervals.

Original languageEnglish
Title of host publication2014 European Control Conference, ECC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9783952426913
StatePublished - 22 Jul 2014
Event13th European Control Conference, ECC 2014 - Strasbourg, France
Duration: 24 Jun 201427 Jun 2014

Publication series

Name2014 European Control Conference, ECC 2014


Conference13th European Control Conference, ECC 2014


  • Lyapunov-Krasovskii method
  • Networked control systems
  • scheduling
  • time-delay approach

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering


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