Stability of second order evolution equations with time-varying delays

Emilia Fridman, Serge Nicaise, Julie Valein

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


We consider abstract second order evolution equations with unbounded feedback with time-varying delay. Existence results are obtained under some realistic assumptions. We prove the exponential decay under some conditions by introducing an abstract Lyapunov functional. Our abstract framework is applied to the beam and to the wave equations with boundary delays.

Original languageEnglish
Title of host publication8th IFAC Workshop on Time-Delay Systems, TDS'09 - Proceedings
PublisherIFAC Secretariat
Number of pages6
EditionPART 1
ISBN (Print)9783902661678
StatePublished - 2009

Publication series

NameIFAC Proceedings Volumes (IFAC-PapersOnline)
NumberPART 1
ISSN (Print)1474-6670


  • Distributed parameter systems
  • Lyapunov functional
  • Second order evolution equations
  • Stability
  • Time-varying delay


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