| Title |
Author |
Abstract
|
| User
Modeling in Active Design Knowledge Service Systems |
YANG
Tao, WANG Yun-li, XIAO Tian-yuan, ZHANG Lin-xuan |
Active design knowledge service system is aimed to provide
accurate and just-in-time design knowledge services and thus
improve the efficiency of design processes. The performance of
user models plays a key role in the adaptivity, responsiveness
and accuracy of these services. To make full use of historical
and inter-user correlations, the stereotype approach and the
machine learning approach are integrated to model design users.
A stereotype-based user modeling process is presented. The key
issues in the ML-based dynamic user model update are
investigated. The verification and validation of user models are
discussed. |
| Modeling
and Simulation Research of Laser Seeker |
YU
Ying-jie,
LIU Zao-zhen |
The paper builds mathematical model of a laser seeker by ways of
integrated modeling method of theory analysis and experimental
research. The modeling progress is described and a test scheme
is brought forward in the paper. The results of
hardware-in-the-loop simulation for guidance and control system,
including the laser seeker, indicate that the mathematical model
is accurate. |
| Introduction
of Modeling and Simulation Resource Repository System |
DU
Qiang-fang, HUO Ju, WANG Zi-cai |
The Modeling and Simulation Resource Repository (MSRR) system,
the key component of the simulation environment, is a very
important supporting software system to fulfill the reusability
of M&S-related resources and to enhance the efficiency of
the development of simulation application systems. This paper
introduces three related issues of the MSRR system: users group,
resource content and organization mechanism, and system
architecture. It also presents a conceptual architecture of the
MSRR system, which is layered, component-based, scalable and
interoperable, on the basis of the technology of traditional
Web-based database. |
| Simulation
Method of Hybrid System Based on Generalized Differential Petri
Net |
WU
Ya-li,
ZENG
Jian-chao,
SUN Guo-ji |
According to the simulation characteristics of hybrid dynamical
system, a simulation model of hybrid system called Generalized
Differential Petri Nets (GDPN) is proposed in this paper, which
makes the simulation of hybrid dynamic system in a uniform
framework. In this framework, the impulse function of discrete
event and continuous state change of the evolution of hybrid
system is completed by firing the transition of GDPN. Then the
simulation algorithm based GDPN model is given based on the
analysis of simulation process of generalized Differential Petri
net. And the conflict phenomenon caused by resource completion
and its resolvent is analyzed. The deadlock and its avoidance in
the simulation process are discussed at last. |
| The
Intelligent
Integration Model
of Modeling & Simulation
for Missile Defense Battle |
ZHANG
Ming-zhi,
LOU Shou-chun, ZHANG Duo-lin, LIU Zhi-qin |
Based on
Distributed Object Technology (DOT) and High
Level Architecture (HLA) rules,
the paper discusses the intelligent
integration model
of modeling and simulation
for missile defense battle. The intelligent
integration model structure is given. Those problems about basic
modeling service, modeling mechanism and simulation mechanism
isinvestigated. |
| Model
and Simulation for Fluid Control System with Pulse-Width
Modulation |
YANG
Yun, SHEN Yi-li, LI Tian-shi |
Fluid control system with pulse width modulation(PWM) is a
nonlinear system in nature and the modulated frequency can not
be too high for the restriction of the response speed of the
valve, thus it is difficult to analyze and synthesize.
Based on the Harmonious Balance Theory, the linear harmonious
model is built for bipolar PWM fluid control system, thus the
Linear System Theory can be applied to analyze and synthesize
the system. The simulation experiments show that the linear
harmonious model has strong ability to describe the PWM system
and reveal the performance of the system. |
| Analysis
and Establishment of Components’ Models of Household
Refrigerator-Freezer for Its Dynamic Simulation |
DING
Guo-liang, ZHANG Chun-lu, LU Zhi-li, SHEN Yu-gang |
According to the process of the software development method of
‘From Top To Bottom’, users’ demands of functions of
household refrigerator-freezer simulation software are analyzed
at first, then dynamic characteristics of a household
refrigerator and its components at different time and under
different conditions are discussed, and next the model-building
and model-selecting strategies are put forward in this paper.
Under the simulation level and computer hardware level nowadays,
the steady model of compressor, the separated-phase
lumped-parameter dynamic models of condenser and evaporator, the
steady model of capillary tube and the z-transfer function model
for thermal load calculation of cabinet are considered
appropriately. Components’ models based on the above
strategies have been used for the development of simulation
software of household refrigerator-freezers successfully. |
| Simulink
Experiment Research on Adaptive Equalization
System Based
on LMS Algorithm |
XU
Ming-yuan,
LIN Hua-fang, QIU Gong-an |
This paper describes a simulink result, which shows the
quantificational correlation between the LMS adaptive
equalization filter’s near-far track and two important
parameters of filter length and iterative algorithm hope step,
for these we design a practicality serial delay spread
transmission environment and a variable multipath transmission
channel. Based on these descriptions we constitute a systemic
simulink model, gain a simulink result and analyze its
significance. |
| Study
on Dynamic Simulation Integration Environment of the Avionics
System |
LI
Quan,
CHEN
Li-xing,
GAO
Ya-kui |
Comparing with the traditional Avionics
System
simulation and testing environment, this paper
puts forward a new framework of Distributing
Real-time Coroutine Simulation Environment (DRCSE), and
describes the principles and composition of the Avionics
System Dynamic
Simulation Integration (DSI) application system developed
by using DRCSE with emphasis on the theory, constitution,
application and time delayed indexes of Real-time Network
technology. In the end, it prospects the development direction
of the DRCSE construction. |
| Applying
MATLAB to System Simulation Based-on Network |
DAI
Yu-liang,
ZENG Bin,
LIN
Jun-xing,
XING
Ji-feng |
With the network being common, application based on network
system is wider. MATLAB is an efficient tool that is used to
auxiliary design, analysis and simulation of system. However, it
can not support network, thus its application is limited beyond
network. The paper proposes a solution that Simulink
communicates in network by means of S-function. Finally the
method is validated by an example based on network system. |
| Research
on Establishment of Temporal Constraint Network and Conflict
Detection in Concurrent Engineering |
XU
Wen-sheng,
XIONG Guang-leng, XIAO Tian-yuan |
This paper introduces a new approach to establish temporal
constraint networks for the product development process based on
IDEF3 process model in Concurrent Engineering. Every kind of
nodes in the IDEF3 process model is converted into corresponding
qualitative temporal constraints in the temporal constraint
networks. Quantitative temporal information from the product
development process is also added to the temporal constraint
networks. By transforming qualitative temporal constraints into
quantitative temporal constraints, a constraint propagation
algorithm is proposed to process the temporal constraint
networks to detect conflicts. This method can effectively detect
the process conflicts in product development process in
Concurrent Engineering. |
| Usability
Evaluation and Link Structure Optimization Model of
E-Supermarket Website |
WANG
You-wei, WANG Ding-wei |
Website structure is described as an un-weighted digraph. A
Website evaluation approach is presented based on the
accessibility of relative commodity pages. A mathematical model
is built up to optimize the link structure of the Website. Tabu
Search (TS) is implemented for optimal solution of this problem.
A case of a Website with random link structure reveals that the
updating algorithm presented in this paper is better than other
two algorithms (Boolean Matrix Multiplication and repeated
calling Breadth First Search Algorithm) during neighborhood
searching of TS. Case study shows that the method introduced in
this paper can assist the Website designers to built more
accessible Websites by adding/deleting a few links. |
| A
Novel Clustering Algorithm in Ad Hoc Network and Its Performance
Simulations |
WANG
Hai-tao,
TIAN
Chang,
ZHENG Shao-ren |
Most existing clustering algorithms only consider some single
factor, which will affect network performances, thus they have
very limited application scenarios. Basing on existent
clustering algorithms, this paper designs a novel clustering
algorithm considering various factors which can improve network
performance to some extent and has more generality. The paper
firstly introduces the backgrounds of the appearance of
clustering algorithms and some
related definitions and assumptions. Then the drawbacks
of several existing clustering algorithms are explained.
Afterwards, a clustering algorithm with good performance-AOW is
analyzed in detail. Finally, performance comparisons and
evaluations between AOW and other clustering algorithms are
performed by simulations. |
| The
Design of Simulation System for Assembly Process Planning of
Sedan Production Line |
ZHAO
Ben,
CHENG Ye, WANG Kun, ZHANG Bo-peng |
Assembly process planning sedan production line is the bridge
between the design and large-scale production. In order to
enhance the quality and efficiency of computer aided assembly
process planning, based on the process modeling and the
generation of assembly sequence and considered the relative
factors between production line and process planning, chart of
process for assembly line (PAL Chart) as a modeling method is
put forward. A software package has been developed according to
the above theory. It includes the main parameters of the line
and displays the planning result directly. It’s an effective
tool for process planning. |
| Planning
Strategy and Simulation Environment of Automotive Assembly Lines
for Mass Customization |
DONG
Jian-hua,
XIAO Tian-yuan, FAN Shu-hai, QIANG Lei |
According to the implementation strategy of mass
customization in automotive industry, three key problems in the
planning of automotive assembly lines for mass customization
were presented. These key problems include improving dynamic
ability of assembly lines, shortening time to delivery, and
reducing cost. Planning strategies to solve these problems were
discussed. A simulation environment for the planning of
automotive assembly lines for mass customization was designed
and established. The environment integrated simulation
interface, optimizer, model base and database. A simulation
experiment made in the environment was demonstrated. |
| Design
and Implementation
of PLC Based Teaching Simulation System |
GUO
He, LUO Wen-hua, CHEN Feng, YANG Jing-you,
GAO Pei-chun |
This article introduces a teaching/training simulation system
built on programmable logic controllers (PLC). The design and
implementation of the system combine the primitive features of
the PLC industrial control system and collect information from a
real cement production line, such as requirement of techniques
and equipments condition. The paper emphasizes the organization
implementation and adaptability on the production equipments
simulation subsystem and explains the essential design principle
combined with rotatory kilns which are very important in cement
production. The teaching simulation system has been applied in a
training schoole. |
| Design
and Realization of the Theater Integrated Air Defense C3I
Simulation System |
MAO
Shao-jie,
LI Yu-ping, JU Zhen-qi, QIAO Xiao |
The air defense C3I system is not only the hardcore
of the Theater Integrated Air Defense C3I Simulation
System, but also the key to both the comprehensive and effective
application of various Air Defense Campaign Weapons and the
guarantee of the Air Control. Hence the simulation of the air
defense C3I system has always been the research focus
in the field of military simulation. Based on the idea of
systematic architecture design, this article mainly schemes for
the air defense C3I simulation system from the
following three aspects, functional structure, physical
structure and operational structure.
Characterizing the integration of modern air defense
operation, the simulation functions include such major
functional segments as early warning survey, communication,
electronic campaigns, the command and control of the air force
operation, the command and control of the ground air defense
operation and the armed campaign. The combined modeling methods
of structural simulation and semi-objective simulation are
adopted in the simulation model of this article, and some brief
introduction has also been given to part of the key models and
algorithms in the article. |
| Architecture
of Scenario System in the Applications of Joint Battle
Simulation |
SHI
Feng, ZHAO Wen, WANG Wei-ping |
Scenario comes from military activities and becomes the most
important part of military simulation domain immediately. It has
a more and more important position in the development of
simulation. Scenario Model is the representation of scenario in
military simulation. Scenario system is the software system
supporting scenario model. In Joint Battle Simulation, scenario
model and scenario system should have much more abilities in
accordance with requests from this kind of applications. An
integrated scenario system based the unified scenario data model
is brought forward to meet it. |
| Dynamic
Simulation of Extra Vehicular Activity |
YANG
Feng, YUAN Xiu-gan, LI Yin-xia |
The significance of computational simulation of the Extra
Vehicular Activity (EVA) is demonstrated. General steps to
simulate astronauts EVA using multi-body dynamics are
introduced. Basic principle of Kane’s method, inverse
kinematics and inverse dynamics are described in detail. The
feasibility of using Kane’s method in simulating EVA is
analyzed. A typical EVA, an actual large-mass-handling EVA
performed on STS-63, is chosen as the example to simulate. Based
on some simplifications, a human model with 7 segments and 6
degrees of freedom aiming at the EVA is established. Using the
method presented, the model is solved and the results are
analyzed. |
| Digital
Simulation of Musical Instrument String Based on Physical Model |
WU
Yong-zhong,
HAN
Jiang-hong,
CHENG
Wen-juan,
ZHENG
Shu-li |
Simulation of musical instrument based on physical model is a
kind of method that is able to describe accurately sound of
instrument by the theory of elasticity and PDE. Nowadays, the
method is becoming an important research domain of instruments
simulation with improvement of computer’s processing power.
This paper depicts a simple numerical model of musical
instrument string based on physical model, and then, derives a
new kind of great facility algorithm with ordinary explicit
expression to process on computer. Compared with L.R
Second-order Recursive System, it has been proved that the
arithmetic is not only simpler, but also more accurate. It is
valuable to use as reference for researchers developing
simulation of musical instrument and sound synthesis. |
| Development
and Application of Augmented Reality |
LIU
Zu-guo,
LI Shi-qi, LI Zuo-qing |
Augmented Reality (AR) is a recent hotspot, and has high
applicable potential. It’s the merging of synthetic sensory
information into a user’s perception of a real environment. AR
supplements reality, rather than completely replacing it. The
display, tracking and registration are key technologies and
emphases of AR research. This paper describes some display
technologies, such as head-mounted display, projection display,
hand-held display and monitor-based display. And the tracking
and registration technologies are also mentioned. Finally, the
paper discusses the applications and future directions of
augmented reality. |
| A
study of Simulation Technology for the Ball Cartridge Experiment
of Cluster Warhead |
YU
De-quan, WANG Shou-qian, ZHAO Zhen, YANG Yun-bin, DENG Ke-wen,
PENG Ying-hong |
In this paper, the importance of the study of simulation
technology for the ball cartridge experiment is explained, the
mathematic model for ball cartridge experiment of cluster
warhead is introduced, and its simulation procedure is proposed
as well. The 3D model of simulation and the simulation system
for ball cartridge experiment of cluster warhead are
established. The simulation process is carried out, and the
result for the experimental simulation is analyzed in detail. |
| National
Regulation Oriented Crashworthiness Simulation of Vehicle
Steering System |
ZHANG
Xiao-yun,
JIN Xian-long, GE Long, ZHOU Chang-ying, AI
Wei-quan, WANG Shi-da |
According to the stipulation protecting drivers from being
injured by motor vehicle steering mechanism, when human model
frontal crashing to steering wheel at the speed of 24.1~25.3
km/h, the force acted on the steering wheel should be less than
11123 N. On the other hand, when vehicle front impact to the
rigid wall at the speed of 50 km/h, the steering upper mounts
will not allow the top of the column to penetrate more than 127
mm towards the driver. In the paper, one steering system is
simulated on this regulation by finite element method. Test
results show that the analysis and simulation techniques are
successful and the method of numerical simulation is effective
in improving automotive passive safety scheme. |
| The
Simulation of Torpedo’s Guidance Trajectory Based on MATLAB/Simulink |
CHAI
Lin, FANG Qun |
This paper introduces the method of design and simulation of the
torpedo’s guidance trajectory based on MATLAB/Simulink.
Firstly, the mathematical model of torpedo’s guidance system
is discussed. Secondly, the paper focuses on how to design the
simulation model with MATLAB/Simulink. Finally, the simulation
results are analyzed. The method can overcome such disadvantages
as properties of complexity, difficulty and lengthiness in the
traditional method of using program language. By using this
method, the dynamic system simulation becomes easy, visual and
quick. |
| Calculating
Method of Radar Cross Section for Formation of Aircraft in Radar
Simulation |
WANG
Chang-wu, DIAO Lian-wang, SHANG Jian-yun, FANG Jia-qi |
A real-time calculation method of RCS for formation of aircraft
is studied. The method is applied to search radar simulation.
First, based on an experiential curve, a simplified method of
calculating Radar Cross Section (RCS) of aircraft in any
attitude angle is presented. Second, when a aircraft is
sheltered in formation of aircraft, some aspects that chiefly
contribute to RCS are considered, which are projection area,
open cavity, capsule cabin and radar cabin. Based on a
simplified model of aircraft, a proportion that these aspects
contribute to RCS when aircraft is sheltered and unsheltered can
be calculated. Then the RCS of a aircraft which is sheltered can
be calculated. Finally, adding the RCS of every aircraft in
formation of aircraft is the RCS of formation of aircraft. |
| Real-time
Simulation of Locomotive-Track Coupled Dynamics |
DING
Guo-fu, ZHAI Wan-ming, LIU Bo-xing |
Locomotive-track coupled system is a complicated system, not
only in dynamics, but also in geometrical structure. In this
paper, on the basis of the complexity analysis of the present
vehicle-track coupled dynamics simulation, from the view of
computer simulation structure and system integration, we study
several integrated and real-time simulation method considering
digital computation and visualization, and explore applications
of multi-thread, DDE, distributed simulation technology and
computer network in locomotive-track coupled dynamics. It shows
that these methods are feasible, especial the DCOM-based
simulation and the one based on off line computation data files
share. |
| Research
on the Reliability Digital Simulation of Rod Pumping System |
ZHANG
Yu-bin,
QI
Wei-hong |
By using the reliability analysis theory of the maintainable
system, this paper sets up the digital simulation model to the
reliability of the rod pumping system in service. On the basis
of the data of spot collected and trimmed, we infer statistical
model of lifetime and maintainable time of each subsystem,
enforce digital simulation to reliability and maintainability of
system by the sample simulation which utilizes Mont Carlo
method, and realize quantitative evaluation to the reliability
of system in the end. |
| Mathematic
Simulation of Coordination of Fuse and Warhead for Air-Air
Missile |
FAN
Hong-da,
YE Wen, MA Xiang-ling |
Based on the mathematic model of coordination of fuse and
warhead of air to-air missile, this paper applies the Matlab
language to simulate the effective staring area of warhead, real
detonating area of fuse and mutual area of coordination of fuse
and warhead for a certain kind of air to-air missile. Finally
through analyzing the simulation results,
basic factors and principal technical approaches are put
forward, which can not only greatly influence but also play an
important role in improving the fuse-battle part cooperation
character. |
| Simulation
Management of Multi-sensor System Based on the Effectiveness
Function |
YANG
Xiu-zhen,
JU
Chuan-wen,
He
You |
Making use of the method of maximizing the synthetic
effectiveness, multi-sensor resources in an aeronautical fire
control system are managed automatically and in real time.
Through this method, the multiple sensor resources can be used
reasonably so that the pilots can discover the most dangerous
target, track and attack it. In this contribution, a target
priority function and a sensor-target pairing function are
defined. The former defines a target’s fatalness, while the
later defines a sensor’s ability to detecting various targets.
An integrated effectiveness function is established by combining
the two functions given above. At last, based on the
effectiveness function along with a waste rate function, a
simulating scheme is designed and executed. |
| Aerodynamic
Simulation of Helicopter Landing and Take-off Environment on
Shipboard |
SUN
Wen-sheng |
The complicated flow on flight deck influences flight safety
seriously when helicopters land and take-off from non-aviation
ship. In this paper, the flow properties of helicopter landing
and taking-off region and its influence on flight safety are
introduced first, then the flow of flight deck is simulated
using finite element method on the basis of Navier-Stokes
equations, and the simulated results are compared with test
results. The helicopter flight properties on flight deck is
discussed, and it is pointed out that the influence of flow on
flight safety should be considered . |
| A
Fuzzy Neural Model for Face Recognition |
YU
Dong-jun, ZHAO Hai-tao, YANG Jing-yu |
In this paper, a fuzzy neural model is proposed for face
recognition. Each rule in the proposed fuzzy neural model is
used to estimate one cluster of pattern distribution in a form,
which is different from the classical possibility density
function. Through self-adaptive learning and fuzzy inference, a
confidence value will be assigned to a given pattern to denote
the possibility of this pattern’s belongingness to some
certain class/subject. The architecture of the whole system
takes structure of one-class-in-one-network (OCON), which has
many advantages such as easy convergence, suitable for
distribution application, quick retrieving, and incremental
training. Novel methods are used to determine the number of
fuzzy rules and initialize fuzzy subsets. The proposed approach
has characteristics of quick learning/recognition speed, high
recognition accuracy and robustness. The proposed approach can
even recognize very
low-resolution face images (e.g., 7x6) well that human cannot
when the number of subjects is not very large. Experiments on ORL
demonstrate the effectiveness of the proposed approach and an
average error rate of 3.95% is obtained. |
| Development
of the Simulator Towards Operators and Control Engineers |
HE
Zu-wei,
YANG Chen, TANG Sheng-li, GOU Xiao-long, TAN
Zhi-qua, GU
Chao-jin, ZOU
Da-qing |
This paper describes a hardware-in-loop simulator for training
operators and control engineers of fossil power plant.
The simulator includes two local networks, one contains the
hardware such as CRT operating stations and configuration
results which are the same as real DCS used in power plant,
another is a simulation system which contains a emulation
DPU(Distributed Processing Unit) and training software for
simulator, and a communication link between them. The simulator
can be used to train operators and validate the configuration
results like process control loop, logical control and so on. |
| A
Method of Workflow Dynamic Modification |
CUI
Li-zhen,
ZHANG Shi-dong, ZHENG Yong-qing, WANG Hai-yang |
Workflow dynamic modification is a hot topic. We propose a
method of workflow dynamic modification, which is based on
Modified Activity Component Base, and according to workflow
model, modify request and combination strategy to complement
workflow dynamic modification. In addition, we discuss the
advantage, feasibility and correctness of this method. |
| An
Active Update Method of Data Warehouse |
LI
Qing-zhong,
ZHANG
Kang-kang,
YANG
Shao-jun,
ZHENG
Yong-qing |
The data warehouse we are building is of a background of
supporting customer relation management decision. We introduce
an active update method ——Unexpected
Event Motivated Method. This method can start data warehouse
update operation in respond to the user's pre-definition and
changes of data in source database. We give a realization schema
based on ECA (Event-Condition-Action)
rules and it is indicated by comparing it with traditional
method that this
new method can provide timely data for the decision and dealing
of unexpected event at the cost of small amount of data
communication. So it solves the conflict between timeliness of
data update and system cost. |
| Study
on Technology of Intelligent Multi-control of Electrod Lifting |
HAO
Pei-feng,
CHEN
Bo-hong,
ZHANG Wei |
Based on the study of arc smelting steel making technology and
through analyzing peculiarity of the smelting, oxidizing,
reduction, with basic theory about multi-control, a proper
method is designed for the intelligent multi-control technology
applied in control of electrode lifting. The intelligent
multi-control model and algorithm to electrode elevating are
worked out. The technology of how to use expert control system
offering the strategies and algorithm switching are studied as
well. Clips software is applied in algorithm program and control
system making. The framework of multi-mode control system is
made of all above researches. Since the system is functioning
the smelting has kept a proper efficiency in varying period, and
the control system works excellent with these control mode and
intelligent algorithm. |
| An
Improved Fast Edge Detection Algorithm Based on Fuzzy Sets |
LIU
Jin-hua, TANG Jing-xin, LONG Tu-jing |
In this paper, a novel improved algorithm based on fuzzy sets is
presented by analyzing Pal.King algorithm synthetically. The
algorithm presented by this paper overcomes the definition
defects of Pal.King algorithm, simplifies the complex
transformation calculation and presents a roboticized algorithm
which determines the optical threshold value of membership,
which is set stably by Pal.King algorithm. The experiment
indicates that the algorithm is an efficient, pervasive and very
valuable image processing algorithm which can extract general
edge. |
| Predictive
Control of Nonlinear Model Based on Neural Network |
ZHANG
Guang-ying, DENG Zheng-long, LIN Yu-rong |
Based
on studies of input and output data,
a predictive control method of nonlinear model is
presented with the linear part of Taylor series expansion of
nonlinear system used as predictive model. In order to ensure
the accuracy of the predictive model, neural network is used as
identifier to estimate the error of predictive model in one-step
predictive control. It has been proved in theory that
three-layer BP network can approximate any nonlinear function in
L2 space arbitrarily and simulation samples in this
paper also show that well control performance can be earned in
this proposed NLMPC algorithm when the neural network can
approximate the error of predictive model. |
| Research
on Available Bandwidth Estimation Algorithm Based on Support
Vector Machine |
SUN
Peng,
ZHANG Hao-ran,
HAN Zhen-zhi |
Modeling and estimation of performance parameters play an
important role in the design of high performance network. The
available bandwidth is related closely to QoS when the traffic
transfers in the network. The rational allocation of the
bandwidth can improve network performance. Based on the theory
of Support Vector Machine, we obtain distribution law of other
data by analyzing and training the sample data. An available
bandwidth estimation algorithm is implemented in this paper.
Simulation results show that this estimation algorithm has
higher training efficiency and estimation precision. |
| Study
on Self-adjusting Genetic Algorithm |
ZHUANG
Jian,
WANG Sun’an |
The selection operator, the corssover operator and the mutation
operator of the genetic algorithm are deeply analyzed in the
paper. Then, it is proved that the main reason of the premature
phenomena is the selection operator. Based on the analysis, a
self-adjusting gene migration genetic algorithm with the
self-changeable mutation rate is designed. And the guideline of
the population differentia is put forward. The probability of
mutation is automatically changed by the population differentia.
So the population diversity is kept and the premature phenomena
are avoided. At last, the convergence of the algorithm is proved
by the Markov-Chain. The experimental results indicate that it
has the ability of the universal using and is suitable for the
engineering calculation. |
| Dynamics
Model and Control Simulation of the Conical Bearings |
YANG
Jing,
YU
Lie,
SHEN
Yue |
The structure of the conical bearing system is simple, but the
control is complex. Because of this, in this paper, a
five-current differential control of the conical bearing system
is put forward and the model of system dynamics is built. Based
on this, aiming at the change of the parameters and the
unexpected disturbances of the conical bearing system, Time
Delay Control (TDC) with robustness properties is applied. By
means of the simulation analysis, the effects of the TDC on the
conical bearing system are compared with those of the common
optimum PD controlling. |
| Removing
Artifacts and Extracting Patterns in EEG Based on ICA |
GUO
Xiao-jing,
WU Xiao-pei, ZHANG Dao-xin, KONG Min, FENG
Huan-qing |
Recently, blind source separation (BSS) by ICA has received
attention because of its potential application in many signal
processing fields. In this paper, ICA is applied to the EEG
signal analysis. One side, our results show that ICA can
effectively detect, separate and remove a wide variety of
artifacts from EEG recordings. On the other, the ICA algorithm
is used to the pattern extraction of mental EEG signals from
different mental tasks. By studying the EEG independent sources
and their projection on human scalp, we can find that some
steady independent components always appear when the subject
repeats the same mental tasks. This result will provide us with
a promising method in the classification of mental tasks and the
research on the Brain-Computer Interface (BCI) technology. |
| A
Recognition System of Single-Hand Words in CSL |
ZOU
Wei, YUAN Kui, ZANG Ai-yun, ZHANG Hai-bo |
In this paper, a recognition system of single–hand Chinese
sign words based on multi-feature matching and information
fusion is introduced, which uses the data glove, vision devices
and sensors fixed on the elbow as input devices. At first, which
category the recognized word belongs to is defined and the word
library is chosen by the hand pose information and gesture
information. Then the multi-feature matching is carried out in
accordance with some rules. Finally, the matching results are
fused by the D-S evidence theory and the word which has the
largest basic probability assignment is outputted. The
experiment results show that the system has not only the better
real-time property and flexibility, but also higher recognition
rate. |
| Design
of the Automatic Landing Fuzzy Control System Based on the
Nonlinear Aircraft Model |
OUYANG
Jin,
QU Wei-dong, ZHANG Wei-guo |
This paper presents a novel design procedure for the control of
aircraft automatic landing system using nonlinear technique and
fuzzy control method. Firstly, the original nonlinear model of
the aircraft longitudinal motion is linearized to a three-order
decoupling system via the input-output feedback technique. A
fuzzy control method is then introduced to design the linear
system, which is used for self-regulation based on analytically
optimal correction function. Finally, simulation examples are
given both in normal and in parameter perturbation cases. The
results show that the control system has good performance. |
| The
Simulation Study of a SAM Based Fuzzy Control Algorithm |
SU
Xiao-lu,
MENG
Xian-yao,
BAO
Dan-di |
A kind of fuzzy control algorithm based on Standard Additive
Model (SAM) is presented in this paper. It is a kind of
algorithm which is fit for industrial control applications. By
using SAM and self-learning SAM in control field, it can modify
the parameters of both input and output. So the algorithm
integrates the advantages of FLC and NN control
.The result of simulation shows that it can control the plant
effectively and a strong robustness can also be achieved. |
