Conference Program of WCICA 2012

Conference Program WCICA 2012
complex multivariable input and output system into several independent
single input single output pseudo-linear sub-systems. In order to make
it have better robustness, with single neuron adaptive PID as subsystem
additional linear controller to constitute a closed-loop system. The
characteristics of combustion system of circulating fluidized bed boilers
also are analyzed and control system based on presented methods
is presented. The simulation results demonstrated that the presented
method could achieve accurate decoupling control with robustness.
◁ PFrB-55
Research on Control Method Combined with Load Coordinate for Dry
Desulfurization of Slurry Fluidized Bed Boiler, pp.3407–3411
Jiang, Aipeng
Ding, Qiang
Lin, Weiwei
Hangzhou Dianzi Univ.
Hangzhou Dianzi Univ.
Hangzhou Dianzi Univ.
It is the most effective resource use practices for slurry and slime to be
used as fuel for Fluidized bed boiler. The dry desulfurization of sludge
Fluidized bed boiler is a large time delay system, and load disturbance
of this system changes frequently. In order to achieve stable control
of SO2 emission, and meet environmental requirements, a fuzzy control
technology combined with the optimal feed-forward was designed.
Combined with field experience, fuzzy controller was designed by fuzzy
control technology, and then the integral process was added to achieve
non-error track. Based on the objective to minimize disturbance impact,
and in order to coordinate the desulfurization control and steam
load control, a nonlinear programming problem for solving the optimal
feed-forward parameters was established, from which the most excellent
feed-forward form can be obtained. Results of 440T/H fluidized
bed boiler show that the proposed method has satisfactory control effect.
SO2 concentration can fully meet environmental emissions requirements,
and its fluctuation is relatively small.
◁ PFrB-56
Research on combustion control and heat efficiency’s online computing
of slime fluidized bed boiler, pp.3412–3416
Jiang, Aipeng
Lin, Weiwei
Ding, Qiang
Hangzhou Dianzi Univ.
Hangzhou Dianzi Univ.
Hangzhou Dianzi Univ.
With the requirements for promoting the energy saving and environmental
protection, it is the main trend for fluidized bed boiler to realize
combustion control and online computing of heat efficiency. In order to
achieve combustion automatic control of fluidized bed boilers, and improve
self-control rates and on-line monitoring of boilers’ heat efficiency.
In this study, the combustion control scheme was firstly designed for a
75 tons fluidized bed boiler. the automatic contorl for feed water, superheated
steam temperature, superheated steam pressure and oxygen
were realized in the DCS system. Then the overall automatic control
of combustion was achieved with advanced control technology. Next,
based on the presented work, on line calculation of heat efficency
was realzied, witch which various parts of heat losses and total heat
efficiency can be real-time monitored to guide the optimal operation of
the boiler.It is very important for energy saving and power management
requirements.
◁ PFrB-57
Simulation Experiment Platform for Optimal Control of the Raw Slurry
Blending Process in the Alumina Production, pp.3443–3447
Guo, Wanli School of Electrical Engineering, Liaoning Univ. of
Tech.
Bai, Rui
Liaoning Univ. of Tech.
Raw slurry blending process is the important process in the alumina
production. This process has the complicated characteristics such as
the fluctuation of chemical content of the raw materials, variation of
the working station, and uncertainty. It is difficult to use the conventional
control strategy to realize the optimization control for the raw s-
lurry blending processes. Lots of experiments and simulations for the
advanced and complicated optimal control must be implemented before
they are utilized in the industrial process. In order to provide a
appropriate research platform for the optimal control of the raw slurry
blending process, a hardware-in-the-loop simulation platform is proposed
with the view of industry. The proposed hardware-in-the-loop
simulation platform is different to the conventional simulation software,
which is composed of the optimal model computer, virtual equipment of
the actuator and sensor, Rockwell PLC. All the signals in this platform
are the standard industry signals. The proposed platform can be use
as an effective platform for the research of the modeling, control and
optimization of the raw slurry blending process.
◁ PFrB-58
Shielding Properties Analysis of underground Methane Sensor based
on Finite Element Simulation and Electromagnetic Measurement,
pp.3448–3453
Ma, Fengying
Ma, Fengying
Shandong Inst. of Light Industry
Shandong Polytechnic Univ.
In order to clear up false alarms, issued by underground methane
sensors, caused by Electromagnetic Interference (EMI), a novel field
way was brought forward in which the simulation and radiated emission
measurement were adopted to accomplish the analysis of shielding
property about methane sensor. The data was acquired through
the R&S spectrum analyzer FSP7. With analyzing the influence of cable
aperture on enclosure shielding properties through simulation and
measurement, the optimization of explosion-proof enclosure was finished
according to the distribution of radiated interference characteristics
and simulation of the trumpet structure shield performance. As
a result, with the optimization of explosion-proof enclosure, the false
alarms of methane sensor significantly reduced; however, there were
still occasionally false alarms when nearby electrical equipments were
switched on and off. Therefore the complex EMI filter was put forward
at power ports and the EMI was controlled within the allowable range.
The running results demonstrated that the problem of false alarms had
been resolved successfully. It is concluded that the improved shielding
and filtering are highly significant in enhancing the Electromagnetic
Compatibility (EMC) of the methane sensor.
◁ PFrB-59
Social Learning with Bounded Confidence, pp.3485–3490
Liu, Qipeng
Wang, Xiaofan
Shanghai Jiao Tong Univ.
Shanghai Jiaotong Univ.
Motivated by the homophily principle in social networks, this paper investigates
a social learning model with bounded confidence, in which
two individuals are neighbors only if the difference of their beliefs is not
larger than a constant called bound of confidence. Each individual updates
her belief through Bayesian inference based on her private signal
plus consensus algorithm based on the beliefs of her neighbors. We
find that the whole group can learning the true state only if the bound of
confidence is larger than a positive threshold, which implies that people
should try to communicate with others whose beliefs are quite different
with themselves, in addition to those similar to themselves. Furthermore,
we introduce a neighborhood-preserved strategy to guarantee
that once two individuals are neighbors they will be neighbors forever.
We show that social learning in the revised model can be realized with
much smaller threshold, and therefore, provide an effective mechanism
for social learning.
◁ PFrB-60
The Network Structure of Optimal Synchronizability for Bounded Regions
Case, pp.3497–3502
Wang, Lifu
Liu, Yunjing
Wu, Zhaoxia
Kong, Zhi
Wang, Xingang
Northeastern Univ.
North-east Univ. at Qinhuangdao
Northeastern Univ. At Qinhuangdao
Northeastern Univ. At Qinhuangdao
Northeastern Univ.
To study the network sturcture of optimal synchronizability with given
node and edge number, we use simple graph to analyze the topology
structure of the optimal synchronizability network. Then, the optimal
network characteristic of N node N-1 edges, N edges, or N+1 edges
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