| Summary: | 碩士 === 國立雲林科技大學 === 電機工程系碩士班 === 90 === There are three topics that are studied in this thesis. In the first topic, we emphasize on the so-called synchronization. By the Lyapunov stability theorem, a state feedback gain can be designed to guarantee the synchronization between the master and slave chaotic systems.
In the second topic, the concept of the cryptology is used to enhance the performance of security in the communication by the chaotic circuits.
In the third topic , we studied how to design an adative controller for hyperchaotic circuits with unknown parameters. By using the concepts of PR or hyper-minimum-phase, the adaptive controller and adaptive law can be designed. Further- more, the concepts cryptography and adaptive control law are combined to design an adaptive cryptosystem.
Finally, some numerical simulations and the fabrication of the chaotic circuits were given to demonstrate the efficiency of the proposed scheme.
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