| Title |
Author |
Abstract |
| A
Cooperative Fuzzy Control Method for Traffic Lights |
HONG
Wei, MU Xuan-qin, WANG Yong, QIN Zhong-yuan, ZHANG Li-hao |
The controlling of traffic lights is an important aspect in city traffic
system. In this paper, a new cooperative fuzzy control method of traffic
lights is presented. At first, the traffic data are acquired from the
detectors in the intersections and lanes. Then a novel fuzzy control rule
is developed to control the phases and delay of traffic lights according
to the dynamic characters of some correlative traffic intersections. The
method can reduce the average time delay of vehicles effectively. The
method is compared with conventional one by computer simulation, and the
results are better and very satisfied.
|
| Scheduling
Grouped Jobs with GA Embedded Fuzzy Logic Method |
YI
Yang, WANG Ding-wei |
Minimizing the total flow time for grouped jobs on parallel machines is
discussed. The method of Genetic Algorithm inserted by fuzzy logic
operation has been used to set this kind of complex combination optimal
problem. The efficiency of this approach is tested on several groups of
random problems and shows that it has potential for practical
applications. |
|
Application
of Fuzzy Control in Polymerizing-kettle System
and Simulation Research |
PIAO
Chun-jun, CHEN Cai-lian |
The performance of strong inertia and long time-delay in
polymerizing-kettle is studied, and the simulation results are presented
based on traditional PID control, fuzzy-PID control, dynamic fuzzy control
and Smith-fuzzy control approaches, respectively. It is concluded that the
Smith-fuzzy control method is the favorite one for this system. |
| The
Study of Lift Feedback Stabilizer Servo System on Ship |
ZHANG
Xiao - yu,
JIN
Hong - zhang, LI Guo – bin，JI
Ming |
This paper investigates
H∞
robust
control problem according to lift feedback fin stabilizer servo system on
ship,the
H∞
controller is designed when
mixed sensitivity problem
SIKS
is considered.Mixed
sensitivity problem
SIKS
,choosing the weighting functions,system singularity and etc are studied
in this paper according to lift feedback fin stabilizer servo system on
ship because they are very important if controller is designed to a
certain system by
H∞
control theory.The idea is valuable
when designing a controller by other system,
H∞
control
advantage is proved by comparing an other controller which is designed by LQG
method, at the same time, system simulation results are analyzed. |
| A
GA-based Algorithm for Searching Optimal Parameters in n-dimension Space |
TANG
Bin, LING Xu-feng,
YANG
Jie |
Problems as function optimization and building discrimination function for
pattern classification can be transferred into the problem to search
optimal parameters in n-dimension space. The approaches based on ANN or
gradient hill climb algorithm have limitations such as the function form
and local optimum. A GA-based algorithm for searching optimal parameters
in n-dimension space is presented, which encodes movement direction and
distance and searches from coarse to precise. The algorithm can realize
global optimization and improve the search efficiency, can be applied
effectively in industrial optimization, data mining, and pattern
recognition. Two examples are given to prove the effect of the algorithm. |
| Applying
and Realizing of Genetic Algorithm in Neural Networks Control |
YANG
Guo-jun, CUI Ping-yuan,
LI Lin-lin |
The characteristics of neural networks and genetic algorithm are
described. The possibility and the method of the application of genetic
algorithm to the multi-layer forward neural networks are discussed. The
necessity of combining neural networks with genetic algorithm is
demonstrated. A kind of neural networks control method is proposed in
which genetic algorithm and neural networks are mixed. In this method, the
notion of using the multi-layer forward neural networks as the
representation method of the genetic searching technique is introduced,
and the weighs of neural networks are trained by genetic algorithm. So the
method remains the global stochastically searching ability of genetic
algorithm and the robustness and self-learning ability of neural networks.
After the neural networks with genetic algorithm are combined organically,
the selection of the basic parameters in genetic algorithm and the
structure of neural networks and the nodes of the hidden layer and the
output layer are all analyzed. The software in which the weights of neural
networks are learned by genetic algorithm is designed. The inverse
kinematics solution of the robot manipulators and the inverted pendulum
control are successfully realized by the combination of genetic algorithm
and neural networks. The simulation results indicate the capability of the
new method in fast learning of neural networks and guarantee a rapid
global convergence. Moreover, the premature convergence in genetic
algorithm is restrained effectively, and the learning efficiency and the
convergent precision for the weights of the multi-layer forward neural
networks are improved greatly. The motivation of this approach is to
overcome the shortcomings of traditional error back propagation algorithm
for updating the weights of the multi-layer forward neural networks, such
as the low precision of the solutions, the slow search speed and easy
convergence to the local minimum points. These results show the proposed
method in this paper is feasible and effective. |
| A
Simulation Software for Neural Network Nonlinear Predictive Control |
LI
Xiang, CHEN Zeng-qiang, YUAN zhu-zhi |
In this paper, we present a computer simulation software for neural
network nonlinear predictive control. Using OOP and message mechanism, we
develop the software's structure and system design, hence we offer a
platform for the simulation study in the control theory and applications. |
| The
Design and Simulation of Neurofuzzy Controller Based on GA |
XUE
Fu-zhen, TANG Yan |
This paper proposes a fuzzy neural network controller whose parameters and
structure are trained by improved genetic algorithm. The fuzzy network
control processing can be viewed as a parallel neural network where each
neuron represents a fuzzy membership function and each link represents a
fuzzy logic, and it has two important characteristics of adaptation and
learning. The result of temperature-control is satisfactory with fuzzy
compensation rule. |
| LMI-based
Design and Simulation of Robust Flight Control System of Helicopters |
Dai
Ji-yang，Mao
Jian-qin |
The robust controller design of a helicopter at low-speed flight and the
simulation of the flight control system are investigated. The design
criteria used in this study are based on a representative subset of the
low-speed requirements of the Military Handling Qualities Specification
ADS-33D. A robust flight controller for UH-60A helicopter is designed by
using linear matrix inequality (LMI) based H¥ controller design method.
The simulation and computation results show that the designed helicopter
flight control system has stability and performance robustness, and meets
given ADS-33D level 1 handling qualities requirements. |
| Scheduling
Small Satellite Mission Using Hopfield Neural Networks |
ZHANG
Fan, ZOU Jing-xiang,
CAO Xi-bin, WANG Jian-bo |
Scheduling small satellite’s mission is to determinate its mission
objectives and make decision to control its operation according to the
mission objectives. So it does factually belong to planning and operation
problem. To the 0-1 integral linear and quadratic programming (0-1 ILQP),
a new approach is presented in the paper to solve the problem by Hopfield
neural networks. First, the objective function and the constraints are
integrated as an integer in the form of energy function with penalty
function approach. Then, the global minimal point of the energy function,
which also is the optimal solution of the 0-1 ILQP, is obtained by using
Hopfield neural networks. Finally, an application to optimizing the
mission schedule of satellite is presented as an example that is solved
successfully with the approach. |
|
Simulation
Studies of Analog Circuits Fault Approach Based on Self-Organizing Feature
Map Neural Networks
|
MA
Ye, LI Nang |
In this paper, the construction of AC fault dictionary and its fast
looking for based on self-organizing feature map are discussed. The method
is very efficient in identification and location of single/many soft/hard
fault. The effects of components tolerance on correct fault location are
reduced because of extensiveness of neural networks. |
|
Neural
Network Control for Air-to-Air Missiles with Thrust Vectoring
|
DONG
Chao-yang, JING Shao-guang, WANG Qing, ZHANG Ming-lian |
The advanced air-to-air missiles possess the characteristics of
maneuverability, agility and accurate guidance performance by adopting
thruster vector control. Because the neural network control has strong
self-learning ability and adaptability to system nonlinear variations, it
has significant advantages in the control of air-to-air missiles with
thruster vectoring. After modeling of the air-to-air missiles with
thruster vectoring, two neural network control methods for the air-to-air
missiles are presented. One of them with two networks, dynamic inversion
learning structure, is given to design an autopilot for the missile. In
order to improve the learning ability of the presented neural network
control system, fuzzy rules based on expert learning experience are
introduced. Numerical simulation results are given to illustrate that the
presented neural network control method possesses strong adaptability to
system nonlinear variations. |
|
Visual
Modeling and Simulation of the High-speed Train Simulator
|
SU
Hu, ZHOU Mei-yu |
High-speed train simulator is an advanced training tool to train drivers
of high-speed trains. The paper introduces the development of visual
simulation system of the high-speed train simulator. The structure of the
visual simulation system, the visual simulation program and scene modeling
are discussed. A path data structure is given to calculate the viewpoint
along railway with cross. |
|
Heterogeneous
Modeling and Simulation for Virtual Prototype of Electro-Mechanical
Systems
|
ZHAO
Wen-hui, LI Si-kun |
Virtual Prototyping (VP) is very useful in conceptual design and for
achieving the goals of Concurrent Engineering. The modeling and simulating
of the virtual prototype of electro-mechanical products involves high
coordination and cooperation between different engineering fields.
Traditional modeling and simulating tools can not fulfill the
requirements. In this paper, we present an approach for multi-disciplinary
heterogeneous modeling and simulating based on the domain objects.
According to this approach, we have developed a distributed VP simulation
environment for electro-mechanical systems. And we have performed the
modeling and simulating of two examples in the environment. The result
shows that the approach can meet the requirements. |
|
A
Model of Battlefield Flame Based on Particle System
in Virtual Environment
|
XIE
Jun-yi, ZHANG Qin, WU Hui-zhong |
As an important part of the so-called special effects in the virtual
battlefield, the flame and explosive effects play a key role in the
overall system performance. The crucial step toward realistic dynamic
flame is to establish its proper model. This paper introduces a model of
battlefield flame based on the particle system and presents its
realization algorithm and corresponding result of real-time rendering. |
|
The
Design of the Submarine Voyage Training Simulator Based on VR
|
WANG
Wen-wu, ZHAO Lin, HAO Yan-ling, YANG Shu-guo |
The designing scheme of the submarine voyage training simulator based on
VR (Virtual Reality) is researched and presented in this paper. An overall
structure of the system is designed and the main function characteristics
of the system are introduced. The simulation models are established. The
design method of the software is advanced. The results of engineering
experiments show that the scheme is reasonable and effective. It is very
important for simulator manufacturing to solve the problems such as
high-spending, long-period and high risk brought by traditional training
on sea. |
|
Application
of Simulated Noise Field to Designing Underwater Acoustic Array
|
ZHANG
Zhong-bing, TONG Li, NI Jin-ping, MA Yuan-liang |
We investigate the method to create the noise field of the underwater by
using numerical simulation. The method has been applied to designing the
optimal array gain of underwater acoustic array. Computer simulation
results show that the method is practical and efficient. |
|
Automatic
Partitions FBM Algorithm in CAGD
|
lIU
Dan, XU
Gang |
On the basis of the fractional Brownian motion (FBM) theory, a kind of
CAGD algorithm with two-dimensional and three-dimensional modeling
function is presented, aiming at the design, production and simulation of
marine simulator. Namely, for different partitions, various FBM or quasi
FBM curves or surfaces are created in real-time. This algorithm has been
successfully applied to the simulation of landforms. |
|
Object-Oriented
Plan View Display
|
XU
Xiang-zhong,
LÜ Ming, WANG Jing-ye |
This paper gives a detailed discussion of the analysis, design and
implementation of the Plan View Display（PVD）subsystem
in DIS based on the combination of the object-oriented technology and the
modular design method. The constructed PVD subsystem has successfully been
re-used and incorporated into several DIS systems. In fact, it can also
easily find its applications in HLA systems with small modifications. |
|
Interactive
Simulation System for Ad hoc Network
|
ZHAO
Zhi-feng, ZHENG Shao-ren |
The multi-hop character and node’s mobility of Ad hoc network makes it
difficult for us to debugging it’s network protocol. At first, the paper
analyses the difficulty in debugging Ad hoc network protocol, and proposes
the way of debugging by using interactive simulation system. Then the
paper thoroughly introduces the function, structure and implementation
method of our Ad hoc network interactive simulation system. At the end of
paper, we give our debugging process in our project by using this
interactive simulation system. |
|
DDM
of Radio Communication Based on HLA
|
MA
Ping, YANG Ming, MA Ning,
WANG
Zi-cai |
High Level Architecture (HLA) supports simulation components
interoperability and facilitates modeling and simulation reusability.
Based on High Level Architecture (HLA), the standard technical
architecture and framework, this paper describes the data distribution
management (DDM) of radio communication simulation. The scenario selected
for this demonstration is a simplified Air Traffic Control scenario.
Routing space based on radio communication scenario is constructed. The
object attribute table and interaction parameter table are defined. |
|
Solution
of Data Transmission in the EW Equipment Simulation Test System
|
DONG
Yin-quan，MA
Xiao-long，
AN
Shu-lin |
In this paper,
according to the concrete requirement of EW Equipment Simulation Test, the
structure and characteristic of the system are discussed. One solution is
proposed to solve the problem of system data transmission, and some key
technique problems are described in the solution. |
|
The
Integrated System for Design, Analysis, System Simulation and Evaluation
of Small Satellite
|
SUN
Zhao-wei, XU Guo-dong,
LIN Xiao-hui, CAO Xi-bin |
This paper put forward the design idea of the integrated system for
design, analysis, system simulation and evaluation of the small satellite.
Advanced simulation software and the AC104 real-time simulator have been
chosen to set up the integrated system that includes two parts:
mathematical simulation system and hardware-in-the-loop simulation system
for developing and testing both software and hardware on board. It is used
to optimize, simulate and evaluate the system scheme during the conception
design stage, to demonstrate and verify the performance and specification
of the components and subsystems during the development stage, and to deal
with the fault diagnosis and procession during test and operation stage. |
|
The
Simulation Software Development for the Constellation Design of Mobile
Satellite Communications System
|
HE
Jia-fu, MA Yi-fei |
Constellation design is one of the key contents for the design of
satellite communications system. It is related directly to the performance
and the cost of system. This paper introduces the design scenario of
simulation software for the constellation design of mobile satellite
communications system, and introduces some of the software’s related
functions. This software has interfaces friendly and a lot of map
operations. It is good for the constellation design, simulation and demo
of mobile satellite communications system in military or in civil uses. |
|
Study
of Methods to Create LAN Model
|
LI
Min，LI
Ren-fa，ZHANG
Ren-qing，YANG
Da-shan |
LAN is one of the networks, which is used frequently now. How to
quantitatively analyze the network’s principles is important to
researchers or studiers. Currently, establishing a simulating network
laboratory is an advanced method to research or study network. The paper
illustrates how to create a LAN simulating model by oriented-object
method. It introduces the classes needed to build the model framework, the
major variables and the methods needed to constitute those classes. The
method also considers its expansibility and practicability. Then, it
simulates a small virtual Ethernet. |
|
The
Design and Implementing about Air-to-Surface Missile Damaging Ground
Targets in the Experiment of Air Defense
|
WANG
Hong-wei, ZHAN Rong-kai,
HE
Han-gen, HUANG Ke-di |
In the experiments of air defense, it is a
complicated problem that the air-to-surface missile damages the targets on
the ground. The fragmentation artillery warhead is utilized in the paper.
The target damage tree is used to build vulnerability model by means of
analyzing the vulnerability of vehicle of launching missile. |
|
Research
on Time and Space Coherence in Ballistic Missile Defense Simulation
|
CHEN
Lei, WANG Hai-li, ZHOU Bo-zhao, YAO Xin-yu |
Time and space coherence is a key problem in distributed simulation. It
has distinct effect on ballistic missile simulation. This paper studies
time and space coherence in ballistic missile defense simulation in the
view of entity simulation. It discusses time and space reference of entity
I/O and time and space coherence of information generating, exchanging and
processing. Effective methods are given to ensure time and space
coherence. |
|
Application
of VRML in the Hierarchical Simulation Modellibrary of
the
Cement Producing Process Computer Simulation
|
LU
Feng,
CUI Xiaohui |
In this paper, the modular modeling technique based on hierarchical method
is utilized to research the cement producing process computer simulation.
Complying with the modular dividing principle, we divide cement producing
system into some certain subsystems and objects. Then, VRML language is
employed to construct the three-dimensional animation of the objects and
submodels which form the primary simulation model library. Building the
more complex models with hierarchical method and adding them into model
library, we realize the dynamic increasing process of the simulation model
library. At last, we discuss the structure of the model library which has
the tree type construction and accounts for the reorganization and the
flexibility of the model library. |
|
3D
Simulation System for Filling Lines Based on
Object-Oriented Technology
|
WANG
Shu-ting, LIU Ji-hong, GUO Yu, ZHONG Yi-fang |
The requirements needed in designing of filling lines are discussed and
the framework for 3D simulation system is presented. The modeling based on
object-oriented technology and 3D graphics is introduced. An application
based on the OpenGL and VC++ to simulate the process of beer filling lines
is given. |
|
Modeling
and Dynamics Simulation Analysis of Principal Axis System of
Revolving Cutting Tube Machine
|
RUI
Zhi-yuan，LING
Wei-ye，JIN
wu-yin，CHEN
Wei-zheng |
Based on the function structure of principal axis system of cutting tube
machine, the dynamics model of principal axis system of the cutting tube
machine is build, and then the dynamic simulation for equilibrium and
running stability of the system is conducted by employing MATLAB/SIMULINK.
By unloading experiment of actual structure and cutting experiment, it is
showed that the precise of numerical simulation is satisfactory, and the
dynamics model of the principal axis system of the cutting tube machine is
feasible. |
|
A
Simulation Approach to Analyzing the Aiming Accuracy
of Neutralization Weapon Affected by Sensor Error
|
FAN
Sui-kang,
ZENG Jian-ping |
The analysis problem of the aiming system accuracy affected by sensor one
is studied. A mathematical modeling of aiming system accuracy resulting
from sensor error is proposed. Based on this modeling, an approach to
estimating and verifying the aiming system accuracy is obtained via
statistics theory. Finally, a simulation example of the neutralization
weapon aiming system is given to show the approach is practicable. |
|
Dynamic
Characteristics of Vehicle Suspension with Non-linear Springs
|
ZHAO
He-ping, HUANG Hong-cheng,
LI
Hong-guang, ZHANG Jian-wu |
In this paper, the dynamic performance of vehicle suspensions having a
non-linear variable stiffness spring instead of conventional one is
studied. The effectiveness of the
small parameter perturbation method by which responses of the non-linear
system are analyzed is discussed, and also the theoretical predictions
produced by the perturbation technique are compared with numerical
results obtained by computer simulations. It is demonstrated through the
comparison that an approximately analytic solution after using the small
parameter perturbation method under periodical excitation can be obtained.
The present research also provides a useful method for the design of the
non-linear suspension system.
|
|
A
Simulation Training Model for Penicillin Fermentation Process
|
XIANG
Hong, XU Fang-wei,
WU
Chong-guang |
It's very useful work to
establish a simulation training system of biochemical reaction for
pharmaceutical industry and higher education of engineering. This paper
roundly considers the specialty of fermentation process and the changes of
various parameters, establishes the dynamic mathematical model for a
penicillin fed-batch fermentation process. The general physic-chemical
conditions of the fermentation, such as temperature, pH, flow rate of air,
and rotational speed of mixer, are taken into account, the model is
therefore dependent on these variables. The simulation result shows that
the model agreed well with real conditions, and reflects the general
characteristics observed in the penicillin fermentation process. |
|
Multi-Reach
Linear Water Quality Model and Its Visual Simulation
|
HU
Wen-hai, LIU yu, SHI Zhong-ke |
Applies GIS to the design of water quality simulation
information system, deduces the linear water quality model of multi-reach
and uses object-oriented method to integrate so as to make the abstract
water quality simulation interactive and visual, to perform the map
solving and data analyzing, and to shorten the model-making period. |
|
Computer
Simulation on Vegetative Growth Process of Seed Plant
|
HUANG
Xi |
Strategies and objects of computer simulation of the vegetative growth
process of seed plant were discussed in this paper. Some general problems
of the process were studied with the biotic dynamic model of life energy
system and computer simulation, such as identification of eigen
coefficients in the energy system, digital analysis of dynamic equation
and its trajectory graphs visualization, mapping between material space
and energy space in plant life active processes. It was attempted to use
computer simulation for analysis of the dynamic process of plant
vegetative growth that can be effectively applied to the quantitative
research of life sciences. |
|
The
Application of Finite State Machine in the CGF’s Behavior Modeling
|
LIU
Xiu-luo, HUANG Ke-di, ZHU Xiao-jun |
This paper makes a comprehensive discussion on the application of Finite
State Machine (FSM) in the computed generated forces (CGF) system. It
first introduces the mathematical model of FSM, then it gives the
principle of using FSM to model the CGF’s behavior. In the end, it
introduces the application of FSM-Modeling method in the ModSAF in detail. |
|
A
New Method of Elevation of Confidence Level of Large-Scale Perplexing
Simulation System
|
LIU
Shi-kao, LIU Xing-tang |
According to the characteristic of large-scale perplexing simulation
system, a new method that is based on similarity theory and evaluates
confidence level with fuzzy mathematics has been put forward. The
principle that establishes fuzzy synthetic discrimination system of
elevation confidence level of large-scale perplexing simulation system is
put forward. So are the techniques of establishing fuzzy synthetic
discrimination matrix and fixed quantity elevation algorithm and method,
which are particularly applicable ‘black box’ and ‘ashen box’
systems. |
|
An
AGV Route Optimization Arithmetic Based on Partition Planar Coding View
|
WU
Yao-hua, WANG Chang-qing |
We use a type of planar coding view arithmetic based on partition in the
process of AGV route planning of material handling simulation. It also has
been used to our computer software Simulate and has good effects. |
|
An
Algorithm for Deformable Model Based on Finite Element
|
WU
Peng, ZHAO Long, WANG Yong-Jun,
LI
Si-Kun |
In this paper, an algorithm is presented for elastic deformable objects
suitable for real-time virtual surgery simulation. This algorithm
considers the special conditions within virtual surgery, and has a good
balance between real-time interactivity and accuracy of the deformable
model. Its real-time interactivity is gained through pre-computing some
data to fasten the calculation of deformation in real-time response to
user’s inputs. Its accuracy comes from the accuracy of the Finite
Element Method (FEM), the base of this algorithm. |
|
Research
on Error for a Three-Axis Flight Simulation Turntable
|
XIAO
Wei-guo, HAO Chong-en, LI Gao-feng |
This paper first studies the pointing error, rate stability error, and
amplitude phase error of the flight simulation turntable, then gives out
specific calculation method for pointing error. And all the investigated
errors of the turntable in some type are calculated. |
