Simulation of a multi-wing chaotic system
with fractional-order and its circuit realization
Qiang Chen
Department of Computer Science,
Guangdong University of Education,
Guangzhou, China
e-mail: cq_c@gdei.edu.cn
Chaoxia Zhang
*
Department of Computer Science,
Guangdong University of Education,
Guangzhou, China
*
e-mail: chaoxia_zhang@163.com
Abstract—In this paper, a fractional-order multi-wing chaotic
attractors evolved from Lü system is proposed. Based on the
theory of fractional calculus, fractional-order multi-wing
chaotic attractors are simulated, and its dynamical
characteristics are also given. Numerical simulation reveals
that multi-wing chaotic attractors can be generated in Lü
system with the system order as low as 2.7. An improved
module-based circuit is also designed for realizing fractional-
order 10-wing chaotic attractor, and the experimental results
are also given, which is in good agreement with the numerical
simulation
Keywords-fractional-order multi-wing chaotic attractor; Lü
system; dynamical characteristics; circuit realization
I. INTRODUCTION
The idea of fractional calculus has been known since the
development of the regular calculus, with the first reference
probably being associated with correspondence between
Leibniz and L’Hospital in 1695, where the meaning of
derivative of order 1.5 was discussed. Although the
fractional operators have a long history, the applications of
fractional-order differential systems to physics and
engineering are just a recent focus of interest [1-4]. It has
been shown that, similarly to the integer-order differential
systems, chaos can be found in fractional-order differential
systems, with potential applications to chaos control and
secure communication [5-7].
To this purpose, in this paper a fractional-order multi-
wing chaotic attractors evolved from Lü system are
investigated.
II. F
RACTIONAL DERIVATIVE AND APPROXIMATION
The well-known Riemann-Liouville definition of
fractional derivatives is given by
∫
+−
−−Γ
=
t
nn
n
t
f
dt
d
ndt
tfd
α
αα
α
τ
τ
α
1
)(
)(
)(
1)(
(1)
Where is the gamma function and
)(⋅Γ
nn
<−
1 , n
is an integer number. Upon considering all the initial
conditions to be zero, the Laplace transform of the
Riemann-Liouville fractional derivative is
{
)(
)(
tfLs
dt
tfd
L
α
α
α
=
⎭
⎬
⎫
⎩
⎨
⎧
}
(2)
Therefore, the fractional integral operator of order ‘
’ can
be represented by the transfer function
α
s
sF
1
)( =
in the
frequency domain.
III. DESIGN OF FRACTIONAL-ORDER MULTI-WING
CHAOTIC ATTRACTORS
In this section, a nonlinear state feedback controller is
designed for creating multi-wing chaotic attractors from a
fractional-order linear differential system .
AXXD =
α
*
The controlled fractional-order differential system with
nonlinear feedback is described as
)(
*
XXX BUAD +=
α
(3)
Where ,
, ,
, and
⎟
⎟
⎟
⎠
⎞
⎜
⎜
⎜
⎝
⎛
=
333231
232221
131211
aaa
aaa
aaa
A
⎟
⎟
⎟
⎠
⎞
⎜
⎜
⎜
⎝
⎛
=
333231
232221
131211
bbb
bbb
bbb
B
T
zyx ),,(=X
T
zDyDxDD ),,(
3
21
****
α
αα
α
=X )1,0(,,
321
.
is a nonlinear state feedback controller equipped with a even
symmetric multi-segment quadratic function, given by:
)(XU
⎟
⎟
⎟
⎟
⎟
⎟
⎠
⎞
⎜
⎜
⎜
⎜
⎜
⎜
⎝
⎛
−−−++
=
⎟
⎟
⎟
⎠
⎞
⎜
⎜
⎜
⎝
⎛
=
∑
=
N
i
iii
CyCyHyH
xz
f
f
f
U
1
2
0
3
2
1
]2)sgn()[sgn(
0
)(
)(
)(
)(
X
X
X
X
(4)
2014 International Conference on Digital Home
978-1-4799-4284-8/14 $31.00 © 2014 IEEE
DOI 10.1109/ICDH.2014.67
320