The Research And Design Of Signal Generator Based On Chaos Theory

Based on the study of three typical Chaotic systems, this paper introduces model simulation under Matlab condition and circuit simulation under Multisim 8 condition and their design process. This paper also discusses the hardware and software design of two kinds of Chaotic signal generator on the basis of AT89C51 MCU and PIC16F877A MCU, especially focus on the implementation of hardware. This paper has finished mainly in five parts as followed:Chapter 1 introduces the Chaos theory background and the significance of the study of Chaotic signal generator.Chapter 2 introduces the concept of chaos and research methods, combined with electronic circuits in the chaotic behavior, the paper introduces the analysis of chaotic circuit system.Chapter 3 introduces a variety of Chaotic system group mathematical model, theoretical analysis, circuit implementation and simulation results. In particular, this paper introduces the Lorenz Chaotic system modeling and circuit simulation under the Matlab / Simulink condition and the implementation process of Chua's Chaotic signal generator under Multisim 8 condition, and discusses circuit simulation and design of the improvement Lorenz and three scroll Chua's Chaotic system.Chapter 4 describes the hardware and software implementation process of one-dimensional chaotic systems based on the AT89C51 MCU and two-dimensional chaotic signal generator based on the PIC16F877A MCU, especially on the design process of chaotic signal generator based on the PIC16F877A MCU. First of all, the paper introduces the selection of MCU chipset and chaotic model, secondly introduces circuit theory and hardware implementation process, and finally introduces the software design process of MCU. The experimental conclusions indicate that the design is feasible and reasonable.Chapter 5 briefly introduces the control and applications of chaotic signals ,As an example of Lorenz chaotic system , using driver - respond ways, the paper introduces synchronization control process of chaotic signal .At the same time,the paper introduces the applications of chaoatic signal source in biomedical instrumentation.