Conference Program of WCICA 2012

Conference Program WCICA 2012
controller and the controlled object are set in the different computers in
the net and a simulation platform of networked control system based
on Ethernet is designed, which uses the mixed programming of Visual
C++ and Matlab. This kind programming adopts TCP/IP protocol and
uses Socket to encapsulate into DLL so as to realize the transmission
of network data. And then build simulation models in the Matlab environment
on two computers at the same time, whose communication are
worked by calling packaged Socket function. Through the simulations
of typical controlled object in the process of industrial production, the
feasibility and effectiveness of the control scheme has been proved.
◁ PFrB-41
The Study of Wireless Sensor Network Energy, pp.433–437
Duan, Ping
Hebei Univ. of Tech.
Based on the ZigBee Wireless Sensor Network technology with its low
cost, low power consumption and low complexity, which has great concerned
application prospect. In view of its node energy limited, replace
the battery isn’t convenient and so on, this paper with an actual application,
from the physical layer of hardware structure and network protocol
in two aspects of the power consumption. Put forward by use of the low
power consumption and has a variety of work mode based on the chip,
the physical layer protocol reduces power consumption , could guarantee
the algorithm of the quality and reduce the system of communication
power consumption. Among them, reduce power consumption
algorithm including: dynamic power management, the determination of
sleeping time.
◁ PFrB-42
Research and Application of Whole-process Virtual Simulation for Tunnel
Shield System, pp.3208–3213
Han, Yanling
No.999, Huchenghuan Road,College of
information, Shanghai Ocean Univ., Pudong New
Area, Shanghai
Cao, Shouqi
Shanghai Ocean Univ.
Aiming at the complexity, dynamics and special safeness of the construction
process for tunnel shield, we applied the computer dynamic
simulation technology into the whole-process simulation realization for
shield construction, constructed 3D virtual simulation platform based on
OpenInventor technology and gave the overall framework of the system;
in the paper, the soil dynamic simulation model in the process
of tunneling operation was researched and ground settlement computation
model was constructed, and the relative arithmetic was given.
The whole process of shield construction was emulated dynamically
and the situation of the soil change and the ground surface settlement
were analyzed and feedback in time, and the actual construction process
was controlled and guided availably by coordinating with configuration
software. At last, we took the new construction project of Xianxia
West Road in Shanghai Hongqiao comprehensive communication hub
as application background and verified by test running, the result indicated
that the simulation system satisfied the construction request on
the scene of tunnel. It explained the feasibility of simulation technology
and simulation model, and provided aided decision-making means for
risk controlling of actual shield construction process.
◁ PFrB-43
Using fuzzy theory and information entropy to detect leakage for
pipelines, pp.3232–3235
Chen, Zhigang
Beijing Univ. of Civil Engineering & Architecture
When detect leakage for pipelines in complicated conditions it is difficult
to determine reasons between pipeline fault symptoms and fault causes.
In order to obtain the complicated subordinate relationships and
to improve the accuracy of pipeline leakage fault diagnosis and other
operations, a fault diagnosis method based on the fuzzy mathematics
theory and the advantages of information entropy quantitative diagnostic
method is proposed. In this study, fuzzy mathematics theory and
some typical information entropy were introduced and how to establish
fuzzy diagnosis matrix and extract characteristic information entropy is
also analyzed in leakage detection for pipelines. Some imitation and
field examples were given. The experiments showed that the mapping
relationships between the pipeline fault symptoms and the fault causes
was most consistent with the actual situation.
◁ PFrB-44
Model Identification for Closed-loop Multivariable Processes Based on
Min-max Critical Frequency Search, pp.3260–3264
Luo, Yunhui
Liu, Hongbo
Cai, Wen-Jian
Jia, Lei
Shandong Univ.
shandong Univ.
Nanyang Technological Univ.
Shandong Univ.
This paper presents an improved method of model parameters identification
in frequency-domain for closed-loop multivariable processes.
Based on reference input and process output data during the closedloop
sequence step tests, the process frequency-responses are estimated
with signal frequency analysis. Using a min-max critical frequency
search algorithm, only a least possible number of frequency points
are obtained for model fitting. Then the first order plus delay time transfer
functions are determined by implementing the linear least-square
method. Compared with existing methods, the proposed identification
technique has the advantage of less computation burden and is easy
for industrial applications. Simulation results show the simplicity and
effectiveness of the proposed method.
◁ PFrB-45
An Adaptive Observer for Actuator and Sensor Fault Diagnosis in Linear
Time-Varying Systems, pp.3281–3285
GAO, Fei
JIANG, Guangwen
ZHANG, Zebang
SONG, Jingyu
Sys. Engineer Research Institude
CSSC
CSSC
CSSC
Fault detection and isolation is important and effective to improve the
safety and reliability of engineering processes and systems. However,
for systems with redundant sensors, it is important to detect faulty sensors
as early as possible to reduce their effect on the performance of
the control systems. In this paper, an observer for linear time-varying
systems with both sensor and actuator faults is derived by extending
the one that considers only actuator faults. Guidelines for selection the
design parameters of the observer are discussed. The global exponential
convergence is established for noise-free systems, whilst for noisy
systems, the estimation errors are shown to be bounded and converged
in the mean to zero if the noises are bounded and have zero means.
The proposed technique is applied to detect both actuator and sensor
faults in a satellite navigation system.
◁ PFrB-46
The Bi-Ramp Type Demand and Price Discount Inventory Model for
Deteriorating Items, pp.3298–3304
Zhou, Youjun
LiuZhou Teachers College
The paper consider a inventory model for deteriorating items with being
out of stock at the beginning, in which the supplies providing price
discount and price-dependent and time-varying demand and so forth.
The existence of the optimal solution is proved and an algorithm of the
optimal ordering policy is given. Finally, we carry out the numerical
experiments.
◁ PFrB-47
A Data-Driven Based Adaptive Fault Diagnosis Scheme for Nonlinear
Stochastic Distribution Systems via 2-step Neural Networks and Descriptor
Model, pp.3311–3315
Zhang, Yumin
Liu, Yunlong
Guo, Lei
Beihang Univ
Beihang Univ.
Beihang Univ.
A data-driven based adaptive sensor fault diagnosis (FD) and compensation
scheme for stochastic distribution control (SDC) systems is studied
in this paper, where an augmented descriptor model is employed.
Unlike traditional SDC systems, the driven information is the output
probability density function (OPDF), which is a kind of image mapping
information to the true output values. A mixed 2-step adaptive neural
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