Robust stability analysis of networked systems with varying delays

Leonidas Dritsas, Anthony Tzes

Research output: Contribution to journalArticlepeer-review


This article is concerned with networked controlled systems (NCS) with uncertain, varying, bounded transmission delays and asynchronous discrete-time static control laws. It is first shown that the delay variation gives rise to a discrete-time uncertain NCS model; robust stability analysis is carried out via a linear matrix inequality approach which, when combined with a directed parameter search, yields an estimate of robust stability bounds against any variations of the maximum allowable delay (constrained within one sampling period) that the closed-loop system can tolerate. The derived bounds are compared with other techniques relying on the singular values of the perturbed NCS-model. The presented simulation results prove the efficacy of the proposed control scheme.

Original languageEnglish (US)
Pages (from-to)2347-2355
Number of pages9
JournalInternational Journal of Control
Issue number12
StatePublished - Dec 2009


  • Delayed systems
  • Networked controlled systems
  • Robust stability

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Science Applications


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