Chaotic Gyros Synchronization

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Author(s): M. Roopaei (Islamic Azad University, Iran), M. J. Zolghadri (Shiraz University, Iran), B. S. Ranjbar (Shiraz University, Iran), S. H. Mousavi (Shiraz University, Iran), H. Adloo (Shiraz University, Iran), B. Zare (Tarbiat Modarres University (T. M. U.), Iran)and T. C. Lin (Feng Chia University, Taiwan)
Copyright: 2011
Pages: 27
Source title: Chaos Synchronization and Cryptography for Secure Communications: Applications for Encryption
Source Author(s)/Editor(s): Santo Banerjee (Politecnico di Torino, Italy)
DOI: 10.4018/978-1-61520-737-4.ch009

Keywords: Information Science Reference / Information Security & Privacy / IT Security and Ethics / Security & Forensics

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Abstract

In this chapter, three methods for synchronizing of two chaotic gyros in the presence of uncertainties, external disturbances and dead-zone nonlinearity are studied. In the first method, there is dead-zone nonlinearity in the control input, which limits the performance of accurate control methods. The effects of this nonlinearity will be attenuated using a fuzzy parameter approximator integrated with sliding mode control method. In order to overcome the synchronization problem for a class of unknown nonlinear chaotic gyros a robust adaptive fuzzy sliding mode control scheme is proposed in the second method. In the last method, two different gyro systems have been considered and a fuzzy controller is proposed to eliminate chattering phenomena during the reaching phase of sliding mode control. Simulation results are also provided to illustrate the effectiveness of the proposed methods.

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