ARTICLE IN PRESS
JID: NEUCOM [m5G; February 15, 2019;13:32 ]
Neurocomputing xxx (xxxx) xxx
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Neurocomputing
journal homepage: www.elsevier.com/locate/neucom
Distributed non-fragile l
2
− l
∞
filtering over sensor networks with
random gain variations and fading measurements
R
Yun Chen, Cong Chen, Anke Xue
∗
Institute of Information and Control, Hangzhou Dianzi University, Hangzhou 310018, China
a r t i c l e i n f o
Article history:
Received 23 August 2018
Revised 4 November 2018
Accepted 18 December 2018
Available online xxx
Communicated by Dr. Ma Lifeng Ma
Keywords:
Distributed non-fragile filtering
l
2
− l
∞
performance
Sensor networks
Random gain variations
Fading measurements
a b s t r a c t
This paper investigates the distributed non-fragile l
2
− l
∞
filter design for a class of discrete-time nonlin-
ear systems with random gain variations and fading measurements. Two mutually independent random
sequences with known distributions are utilized to describe the probabilistic properties of the random
gain variations phenomenon and fading measurements, respectively. Based on stochastic analysis and
Lyapunov function approach, the sufficient condition is presented to guarantee the mean-square expo-
nential stability and l
2
− l
∞
disturbance attenuation performance of the augmented filtering error system.
The solutions of the desired distributed non-fragile filter gains are characterized by solving linear ma-
trices inequalities to keep the sparsity of the weighted adjacency matrix of sensor networks. Finally, an
illustrative example is provided to show the effectiveness of the proposed design approach.
©2019 Elsevier B.V. All rights reserved.
1.
Introduction
Sensor networks are generally composed of a large number of
sensors that are capable of sensing, computation, and signal trans-
mission. The sensor nodes are spatially distributed to construct a
network with certain topology structure, such that they work in
coordination way. Owning to the low cost and power consumption,
and customizable and distributed structure, sensor networks have
been successfully applied during the past decades in lots of areas,
including military, industrial, agricultural and environmental fields
[1–4] . Among the wide-scope domains of applications, distributed
estimation and filtering have gain considerable research interest in
the past years. Distributed Kalman filtering theory and algorithm
have been proposed for target plants with apriori information of
exogenous Gaussian noises [5–7] . On the other hand, for many
practical systems whose noises statistical values are unavailable, it
is usually assumed that the exterior noises are square-integrable or
square-additive, respectively, for continuous-time [8] or discrete-
time systems [9] . Then, by minimizing the L
2
-induced norm and
energy-to-peak norm, the H
∞
filtering [8,10,11] and L
2
− L
∞
fil-
tering [11–14] strategies have been presented, respectively. The
R
This work was supported in part by the National Natural Science Founda-
tion of China under Grants U1509205, 61473107, 61333009 and 61427808 . and in
part by the Zhejiang Provincial Natural Science Foundation of China under Grant
LR16F030 0 03 .
∗
Corresponding author.
E-mail addresses: cloudscy@msn.com , akxue@hdu.edu.cn (A. Xue).
energy-to-peak norm in discrete-time systems is generally called
l
2
− l
∞
one, and the corresponding discrete-time l
2
− l
∞
filtering
issue has been considered [15] . The concept of H
∞
filtering has
been extended to the distributed H
∞
filtering over sensor networks
[16–18] .
When considering the ubiquitous unideal measurement phe-
nomenon in networked systems [19] , the problem of distributed
H
∞
filtering over sensor networks with missing measurements, ex-
pressed by 0-1 Bernoulli distribution, has been dealt with in recent
years [20,21] . With regard to distributed filtering over sensor net-
works with missing measurements, the redundant-channels-based
method is useful to improve the performance [22,23] . In fact, many
imperfect measurements cannot be simply described as Bernoulli
sequences [24] . By contract, fading measurements/channels mod-
els are presented to the stochastic measurement decays phenom-
ena characterized by random sequences with known mathematical
expectations and variances [25,26] . The distributed filtering issues
for continuous- and discrete-time systems over sensor networks
with measurements fading have been thoroughly investigated in
[27,28] and [29,30] , respectively. However, the problem of dis-
tributed l
2
− l
∞
filtering for nonlinear discrete-time systems over
sensor networks with fading measurements still remains open, and
it is the first motivation of the current paper.
It deserves to note that, in real implementations of con-
trollers/filters, the gains uncertainties resulting from the numer-
ical roundoff errors, A-D conversion errors, limited word length,
and some other reasons, will degrade the systems performance,
and even lead to instability. So, the influences of gain variations in
https://doi.org/10.1016/j.neucom.2018.12.008
0925-2312/© 2019 Elsevier B.V. All rights reserved.
Please cite this article as: Y. Chen, C. Chen and A. Xue, Distributed non-fragile l
2
− l
∞
filtering over sensor networks with random gain
variations and fading measurements, Neurocomputing, https://doi.org/10.1016/j.neucom.2018.12.008