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Robust adaptive backstepping synchronization for a class of uncertain chaotic systems using fuzzy disturbance observer

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Abstract

This paper proposes a robust adaptive backstepping synchronization method for a class of uncertain chaotic systems. Unknown factors including system uncertainties and external disturbances are estimated by a fuzzy disturbance observer. By use of the fuzzy disturbance observer, any prior information about the unknown factors is not need. The proposed method using the estimated values guarantees the global synchronization for chaotic systems with mismatched uncertainties in the sense of uniform ultimate boundedness. Finally, numerical examples are presented to show the effectiveness of the method.

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Acknowledgements

The work was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science, and Technology (2010-0009373).

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Correspondence to Ju H. Park.

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Ji, D.H., Jeong, S.C., Park, J.H. et al. Robust adaptive backstepping synchronization for a class of uncertain chaotic systems using fuzzy disturbance observer. Nonlinear Dyn 69, 1125–1136 (2012). https://doi.org/10.1007/s11071-012-0333-2

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  • DOI: https://doi.org/10.1007/s11071-012-0333-2

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