Nonlinear Dynamics

, Volume 59, Issue 3, pp 477–483 | Cite as

Robust adaptive synchronization of uncertain unified chaotic systems

  • Hamid R. Koofigar
  • Saeed Hosseinnia
  • Farid Sheikholeslam
Original Paper


The problem of synchronizing a unified chaotic system in the presence of parameter variations, unstructured uncertainties, and external disturbances is addressed. To tackle such perturbations whose bounds may be unknown, two robust adaptive algorithms are proposed. The stability analysis is presented based on the Lyapunov stability theorem. Simulation results demonstrate the performance of the developed synchronization schemes.


Robust adaptive synchronization Lyapunov stability theorem Unified chaotic systems External disturbance 


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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Hamid R. Koofigar
    • 1
  • Saeed Hosseinnia
    • 1
  • Farid Sheikholeslam
    • 1
  1. 1.Department of Electrical and Computer EngineeringIsfahan University of TechnologyIsfahanIran

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