【作者】 林若波；

【导师】 刘宏立；

【作者基本信息】 湖南大学 ， 电路与系统， 2009， 硕士

【摘要】 在研究三种典型的混沌系统的基础上,提出了基于Matlab环境下的模型仿真以及Multisim 8环境下的电路仿真与设计过程,并基于AT89C51单片机和PIC16F877A单片机,讨论两种混沌信号发生器的硬件和软件设计,并把重点放在如何对其进行硬件实现上。全文主要完成五个方面的内容:第1章阐述了混沌的研究背景和意义,探讨混沌信号发生器的研究意义。第2章阐述了混沌的有关概念和研究方法,并结合电子电路中的混沌行为,提出混沌电路系统的分析方法。第3章阐述各种混沌系统族数学模型的建立、理论分析、电路实现方法和仿真结果,特别是基于Matlab/Simulink的Lorenz混沌系统建模与电路仿真实现和基于Multisim 8的蔡氏混沌信号发生器实现过程,并讨论了改进Lorenz和三涡卷蔡氏混沌系统的电路仿真与设计。第4章阐述基于AT89C51的一维混沌系统和基于PIC16F877A的二维混沌信号发生器的硬件和软件实现过程,特别是讨论了基于PIC16F877A的混沌信号发生器的设计过程。首先介绍单片机芯片的选择和混沌模型的选择,其次介绍电路原理和硬件实现过程,最后介绍单片机软件设计过程。通过结果验证其设计方案的可行性和合理性。第5章简要介绍混沌信号源的控制与应用,以Lorenz混沌系统为例,采用驱动-响应方法介绍混沌信号的同步控制过程,并简单介绍混沌信号源在生物医疗器械中的应用。更多还原

【Abstract】 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.更多还原