I this week
, I plan to read the following s
5] is picked by Dr.
is picked up by me.
is referenced in
, which models and analyzes the long random
delay networked system.
zhen Wu and Xiao
hong Hao. A novel optimal controller design and evaluation for networked
control systems with time
variant delays. Presented at Measuring Technology and Mechatronics
MA), 2010 International Conference on.
Ping Liu, Yuanqing Xia, David Rees and Wenshan Hu. (2007, Design and stability criteria of
networked predictive control systems with random network delay in the feedback channel.
Man, and Cybernetics
, Part C: Applications and Reviews, IEEE Transactions on 37(2),
 E. C. Martins and F. G. Jota. (2010, Design of networked control systems with explicit compensation
Systems, Man, and Cybernetics, Part C: Applicat
ions and Reviews, IEEE
Transactions on 40(3),
 L. Samaranayake, M. Leksell and S. Alahakoon. Relating sampling period and control delay in
distributed control systems. Presented at Computer as a Tool, 2005. EUROCON 2005.the International
 R. A. Gupta and Mo
Yuen Chow. (2010, Networked control system: Overview and research trends.
Industrial Electronics, IEEE Transactions on 57(7),
 Jin Wu, Fei
Qi Deng and Jing
Guang Gao. Modeling and stability of long r
andom delay networked
control systems. Presented at Machine Learning and Cybernetics, 2005. Proceedings of 2005
International Conference on.
Ping Liu, et al. "Design and Stability Criteria of Networked Predictive Control Systems with Rand
om Network Delay in the Feedback
Systems, Man, and Cybernetics, Part C: Applications and Reviews, IEEE Transactions on
37.2 (2007): 173
This paper is concerned with the design of networked control systems (NCSs) with random network delay in the feedback channel
gives stability criteria of closed
loop networked predictive control systems. The principle of predictive control is adopted t
o overcome the
effects of network time delay. The necessary and sufficient conditions on the stability of the closed
loop NCS are derived, which provides
useful analytical stability criteria. The closed
loop networked predictive control system with bounded
random network delay is stable if
the corresponding switched system is stable. Simulation and real
time results give an illustration of the proposed control strategies.
Gupta, R. A., and Mo
Yuen Chow. "Networked Control System: Overview and Research Tren
Industrial Electronics, IEEE Transactions on
57.7 (2010): 2527
Networked control systems (NCSs) have been one of the main research focuses in academia as well as in industry for many decad
have become a multidisciplinary area. With these gr
owing research trends, it is important to consolidate the latest knowledge and
information to keep up with the research needs. In this paper, the NCS and its different forms are introduced and discussed.
beginning of this paper discusses the history an
d evolution of NCSs. The next part of this paper focuses on different fields and research
arenas such as networking technology, network delay, network resource allocation, scheduling, network security in real
integration of components on a netwo
rk, fault tolerance, etc. A brief literature survey and possible future direction concerning each topic
Jin Wu, Fei
Qi Deng and Jing
Guang Gao. "Modeling and Stability of Long Random Delay Networked Control Systems." Machine Learning and
rnetics, 2005. Proceedings of 2005 International Conference on.
The work of this paper is the first step of the Networked Control Systems Project. In this paper, modeling and stability of t
random delay networked control systems are discussed. The
objective is to present a model for such systems, and discuss the systems'
stability under such a model. First, we employ the multirate sampling method together with the augmented state matrix method
model the long random delay networked control systems
. Secondly, by formulating the modeled systems as discrete
systems, the long random delay networked control systems' stability can be reduced to the corresponding problems of the discr
switched systems. By applying the available resul
ts in the literature for the discrete
time switched systems, we present a theorem about
the sufficient conditions of the systems' dwell time stability and discuss how to select the proper N so as to stabilize the
considering rigorous stability and
get a good system performance as well.
zhen Wu, and Xiao
hong Hao. "A Novel Optimal Controller Design and Evaluation for Networked Control Systems with Time
Delays." Measuring Technology and Mechatronics Automation (ICMTMA), 2010 International
A new model for networked control systems (NCSs) with structured uncertainties and multiple state time
delays is presented, In view of
input and multi
output (MIMO) NCSs with many independent sensors and actuators, a continuous time m
odel of NCSs with
delays and uncertainties are proposed. A method of delay
estimation online is also given. Then a scheme based on LQG
controller is designed to achieve desired Real
time performance. The result illustrate that the effectiv
eness of the proposed control
design and the satisfactory performance of the system.
Martins, E. C., and F. G. Jota. "Design of Networked Control Systems with Explicit Compensation for Time
and Cybernetics, Part C: Applica
tions and Reviews, IEEE Transactions on
40.3 (2010): 308
In this paper, the effects of network delay among interconnecting elements of a distributed computer network control system a
analyzed. Experimental tests have been accomplished to show the in
fluence of the combined effects of the network delay (between
sensor/controller and controller/actuator) on the overall performance of a feedback control system. For this purpose, a propo
integral (PI) controller has been used. This controller
has been designed, using the well
known direct synthesis method and implemented
in a didactic networked control system platform. Corresponding (
transform) difference equations have been used, assuming time
triggered (regular) samplings. The augmented PI
controller (with compensation of the control signal and estimation of missing
measurements) is developed. Stability analysis is performed to verify the validity of this scheme. The results presented in t
show that the dynamic behavior of the closed
loop system can be improved using the proposed technique.
Samaranayake, L., M. Leksell and S. Alahakoon. "Relating Sampling Period and Control Delay in Distributed Control Systems." C
omputer as a
Tool, 2005. EUROCON 2005.the International Conference on.
The control delay in distributed control systems may be compensated on
line or off
line depending on the required quality of the output,
available computational power of the controller node, time stamping and clock synchronizing facilities etc. Irrespecti
ve of the
compensation technique, there is an upper bound to the constant or variable control delay, which is decided by the plant, con
the selected sampling period of the distributed computer controlled system. It is shown that in general, if t
he control delay exceeds the
sampling period, the system becomes multi
rate; deteriorate performance as the plant updates do not correspond to the output samples.
This paper introduces an adaptive sampling scheme to ensure the control delay is less than th
e sampling period in steady state and uses
the maximum tolerable delay of the system at a particular sampling interval to ensure stable transform from one sampling peri