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Synchronization of Two Different Unified Chaotic Systems with Unknown Mismatched Parameters via Sum of Squares Method

Cheol-Joong KIM, Dongkyoung CHWA

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Summary :

This paper proposes the synchronization control method for two different unified chaotic systems with unknown mismatched parameters using sum of squares method. Previously, feedback-linearizing and stabilization terms were used in the controller for the synchronization problem. However, they used just a constant matrix as a stabilization control gain, whose performance is shown to be valid only for a linear model. Thus, we propose the novel control method for the synchronization of the two different unified chaotic systems with unknown mismatched parameters via sum of squares method. We design the stabilization control input which is of the polynomial form by sum of squares method and also the adaptive law for the estimation of the unknown mismatched parameter between the master and slave systems. Since we can use the polynomial control input which is dependent on the system states as the stabilization controller, the proposed method can have better performance than the previous methods. Numerical simulations for both uni-directional and bi-directional chaotic systems show the validity and advantage of the proposed method.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E96-A No.9 pp.1840-1847
Publication Date
2013/09/01
Publicized
Online ISSN
1745-1337
DOI
10.1587/transfun.E96.A.1840
Type of Manuscript
PAPER
Category
Nonlinear Problems

Authors

Cheol-Joong KIM
  Ajou University
Dongkyoung CHWA
  Ajou University

Keyword