第 47 卷 第 5 期
2011 年 10 月
兰 州 大 学 学 报(自然科学版)
Journal of Lanzhou University (Natural Sciences)
Vol. 47 No. 5
Oct. 2011
Articlcal ID: 0455-2059(2011)05-0120-07
A hyperchaotic Lorenz system circuit simulation and
synchronization
XUE Huai-qing
1
, PENG Jian-kui
1
, WANG Zhen-qian
1
, HU Ping
1
, ZHANG Li
2
1. Normal College, Gansu Lianhe University, Lanzhou 730000, China
2. Basic Courses Department, Lanzhou Polytechnical College, Lanzhou 730050, China
Abstract: A new hyperchaotic Lorenz system was constructed by introd u cing a nonlinear state feedback con-
troller, and its abundant dynamic behavior was studied by using numerical simulations and theory analysis. At
the same time, by means of PSPICE and MATLAB, an electronic circuit was designed to realize the hyperchaotic
Lorenz system and the circuit simulations obtained were identical with the numerical simulations. Moreover,
the adaptive controller was proposed to achieve hyp erchaotic synchronization. It is concluded that by means of
Lyapunov theory and numerical simulation the controller designed is effective.
Key words: hyperchaotic Lorenz system; circuit simulation; hyperchaotic synchronization; adaptive control
CLC number: O545 Document code: A
超混沌 Lorenz 系统的电路模拟与同步
薛怀庆
1
, 彭建奎
1
, 王振乾
1
, 胡 萍
1
, 张 莉
2
1. 甘肃联合大学 师范学院, 兰州 730000
2. 兰州工业高等专科学校 基础学科部, 兰州 730050
摘 要: 对 Lorenz 系统添加一个非线性状态反馈控制器所构成的四维超混沌Lorenz 系统, 并运用数值模拟和
理论分析的方法研究该超混沌系统丰富的动力学特性, 同时运用 PSPICE 和 MATLAB 软 件设计电子电路以
实现超混沌系统, 并且所 得电路仿 真结果与数值仿真结果完全一致; 然后提出自适应控制器以实现超混沌同
步; 最后运用 Lyapunov 理论与数值模拟证实所设计的控制器的有效性.
关键词: 超混沌 Lorenz 系统; 电路模拟; 超混沌同步; 自适应控制
中图分类号: O545 文献标识码: A
The study on chaos has received great attention
in the past several decades, especially synchroniza-
tion and control. A regular chaotic s ystem has one
positive Lyapunov exponent and hyperchaotic sys-
tems have more than one positive Lyapunov expo-
nents. Of course, hyperchaos is more complex and
play a significant role in nonlinear sciences. Since the
discovery of the first hyperchaotic Rössler system
[1]
,
many new hyperchaotic systems have been developed
and studied
[2−5]
. Recently, there has been increas-
ing interest in exploiting hyperchaos in e ngineer-
ing application, such as telecommunications, com-
puting and informa tion processing, etc
[6−7]
, where-
as not much attention has been focused on genera-
tion of hyperchaos via simple devices such as circuit
design
[8−14]
.
It is well known that some chaotic systems have
the following disadvantages in secure communication
applications. In fact, adopting higher-dimensional
chaotic systems has been proposed for secure com-
munication and the presence of more than one Lya-
punov exponent clearly improves the se curity of com-
munication schemes by ge nerating more-c omplex dy-
namics. In the past 15 years, many techniques for
Received date: 2011-03-16
Found term: Supported by the Foundation for College Tutor’s Research Project of Gansu Province(1013-05)
Biography: XUE Huai-qing(1965−), male, born in Qin’an, Gansu Province, associate professor, e-mail: xhq65@tom.com,
majoring in nonlinear dynamics and complex network.