| Title |
Author |
Abstract |
| Development
of Distributed Simulation of Control System for Multi-user |
LIU
Guo-gang, SHEN Chun-lin, XIN Ji-ling |
Distributed computing is applied to the simulation of
aero-engine control system by combining the Client/Server
communication mode of computer networks with the communication
mechanism between the controller and controlled object. A
distributed and multi-user simulation system is developed which
can run within the local networks. One mathematical model of
aero-engine in the Server computer can be shared by multi-client
i.e. controller in different computers at the same time, thus,
resource of computing is economized and work efficiency is
improved. |
| Training-based
Simulation Model and Algorithm of Plesiochronous Digital
Hierarchy -Fiber Communication System |
Xu
yong-ping,
Zheng ling-hua,
Han
fang-jing |
The core problem of developing Fiber Communication Training
Simulation System is to set up the simulation model. In this
paper, NOKIA Fiber Communication System is used as an example, a
modeling method and a model example are proposed, related data
and data algorithm are given out. Experiment results indicate
that this model and the related algorithm are right. The basic
modeling method holds true for other communication transmission
systems. |
| Object-Oriented
Modeling of Automatic Train Operation Simulation System |
LU
Yan-dan, TANG Tao |
Automatic train operation is one important part of the automatic
train control system. It can operate the train taking the place
of driver to ensure train’s running in efficiency and energy
saving. This paper illustrates the process of analysis and
design of automatic train operation by use of object-oriented
method, and completes the software design of this simulation
system. |
| A
Track Association Algorithm and Simulations |
JIA
Pei-zhang, QI Quan-yue |
The problem of track association for multiple target tracking
via two sensors is studied in the paper. The sensor-A measures
range and bearing, while the sensor-B measures the bearing and
elevation. The algorithm consists of two steps: first step is
rough correlation test and the second one is a fine correlation
test. In the second step the performance index is obtained from
the likelihood rate test, and is applicable to formation flight
and cross flight of multiple target. The simulations show that
the efficiency of the algorithm is close to the theoretical
correlation probability. |
| Interacting
Multiple Model Algorithm in Transient Process |
JIA
Yu-gang, LIANG Yan, PAN Quan,
ZHANG
Hong-cai, DAI Guan-zhong |
Interacting Multiple
Model Algorithm (IMM) has been demonstrated to be the most
cost-effective algorithm in hybrid estimation. But its
performance degrades when the target real model has changed. The
transient process of IMM is proposed to account for the
performance degradation. Simulation results of the transient
process are analyzed in this paper. |
| High
Resolution Array Processing for
Direction-of-Arrival
Estimation of Underwater Multiple Targets by Computer
Simulation Method |
FENG
Xi-an, HUANG Jian-guo |
This paper studies the statistical performance of several
well-known DOA (Direction of Arrival) estimators of underwater
multiple targets by the computer simulation, which offers an
important idea for the underwater array processing. These
estimators include the signal subspace methods, ESPRIT and WSF.
They possess good statistical performance. We study the
resolvability and the bearing estimation precision of these
estimators based on our work by simulation. The resolution
probability curves and mean square error curves for two and
three targets respectively are obtained. These simulation
results are important reference to the DOA estimation of
underwater multiple targets. |
| Some
Methods of Developing 3D Graphics in Anti-Tank Missile Training
Simulator |
LI
De-qiang, HUANG Sha-bai |
In this paper, we present some methods for generating and
manipulating 3D models by WTK (World Tool Kit). First, we
establish 3D scene graph, a hierarchical architecture, which
depicts the relationship of objects in the scene. Next, discuss
the terrain matching between tank model and terrain model
in detail. Finally, how to detect collision between missile and
tank is reported as well. The methods mentioned above are proved
to be effective in our development of an anti-tank
missile-training simulator. |
| Object’s
Through Signature Simulation Based on Power Spectrum Density
Estimation |
WANG
Ben-gang, DONG Da-gang,
XIE
Song-yun |
This paper analyzes the frequency signature of real-detected
ship noise, proposes a kind of method to extract the object
signature, builds up object’s through signature mathematical
model and respectively simulates the through signature of whole
frequency channel noise and each frequency channel noise for two
class of objects on different conditions. The research result
can apply to the ship noise identification. |
| Proprioceptive
Simulation Algorithm and the Realization in 6DOF Flight
Simulator |
XIONG
Xiao-hua, LI Wei-jia |
A six-degree-of-freedom flight simulator was employed, which
simulates the Z9 helicopter. Having compared several mature
proprioceptive simulation algorithms, classical washout filter
algorithm was adopted to realize the proprioceptive control of
the simulator, and the washout filter algorithm was built on
Matlab and VC++ platform. Using this model we get the simulation
results, which indicate that the algorithm provides an effective
way to implement the function of the proprioceptive simulation
system sufficiently. |
| An
Adaptive Ant Colony Optimization Algorithm and Simulation |
Wang
Ying, Xie Jian–ying |
Ant Colony Optimization (ACO) algorithm is a new optimization
algorithm, and has the limitation of stagnation. In this paper,
the performance of ACO is improved by the adaptive variation of
the parameter in the algorithm. The simulations for TSP problem
show that the improved algorithm can find better paths at higher
convergence speed. |
| Lumped
Inductor Transmission Line Modeling Based Control System
Numerical Simulation |
YU
Zhi-yong, XU Hua-long, LIU Guang-bin |
This paper presents a numerical simulation algorithm based on
numerically solving differential equation system by means of the
Transmission Line Modeling (TLM) for lumped inductor. Mapping
state variables of a state equation to currents in some
lumped-inductors respectively, the state equation is worked out
by employing the transmission line model of those inductors, and
namely the simulation process for the control system is
completed. This process is unconditionally stable and it is
easily confirmed by the nature of the equivalent passive network
of a lossless transmission line. |
| Key
Computing in Monte Carlo Method for Remote Sensing Mechanism
Study |
Su
Li-hong, Huang Yu-xia,
Li Xiao-wen |
Several key computing methods in Monte Carlo simulation for
investigation of remote sensing imagery mechanism are
introduced. The leaf angle distribution function describing
inclination and orientation of leaves in a canopy is written in
a probability density function. Six essential leaf angle
distribution functions and the integrating algorithm are given.
The light intercepted probability at any direction in a canopy
is expressed by the G-function. Integrating nodes and weights of
24-nodes Gauss double precision integration algorithm are
listed. The way to obtain the photon fly direction for
Lambertian reflection and emission is deduced. Photons move and
hit leaves in canopy global coordinate system though the photons
are launched or reflected in leaf local coordinate system.
Judging rules whether a photon hits the above surface or the
under surface of a leaf or neither both are discussed. Two
matrixes, which transforms the direction in leaf local
coordinate system into the global coordinate system, are showed. |
| An
Empirical Self-Similar Traffic Generation Method |
WU
Ze-min, ZHENG Shao-ren |
An empirical self-similar traffic generation method is
introduced in the paper. Based on statistical characteristic of
measured data traffic, it can online generate self-similar
traffic with varying parameter. The affect of user behavior to
self-similarity is also proved because primary parameters used
are from application layer character. The performance of this
empirical algorithm is discussed by means of simulation; the
result shows its suitability. This algorithm can be a candidate
of online traffic generator. |
| Simulation
System of the Third Party Logistics’ Delivery |
Tang
Xiao-fei |
Problems such as traffic congestion, routing, environment noise,
energy crisis and cost control are usually to be considered for
the Third Party Logistics delivery system, which have come down
to a lot of unconventional mathematical models so as to
invalidate the practical application of the system. Based on the
idea of Object-Oriented and the conception of system theory,
this paper put forward a Object-Oriented TPL’s Delivery
Simulation Model. With describing the relationships among the
components of delivery system, the control functions of delivery
and its parameters can be studied by simulating with this model. |
| Simulation
Method for the Research of the Passengers’ Traffic Mode Choice
Behavior |
LIU
Wei-guo, HU Si-ji |
On the basis of random utility theory, this paper discusses the
simulation method for the research of the passengers’ traffic
mode choice behavior. Firstly, how to determine the structure
and parameters of the model is discussed; Secondly, the
simulation method for a single passenger’s behavior is
proposed; to obtain the statistical result, lots of passengers
must be generated randomly. Lastly, an example is presented. |
| Heuristic
Algorithm for Solving Resources Constrained Transportation
Optimization Problem |
Yang
Xiang-long,
Feng Yun-cheng,
JU
Yan-bing |
This paper introduces a heuristic algorithm to solve a
large-scale combinatorial optimization problem for
transportation problem with constrained resources. Because of
the complexity of the real transportation system, the objective
function of its performance about the total transportation time
cannot be obtained by analytic method. At the same time, the
difficulty in optimization process increased by the constraints
of resources about the route and transfer station, so the
traditional network method has no way to solve such bottleneck
transportation problem. The heuristic algorithm provided in this
paper utilizes the property of simulation on real system and the
feedback from the constraint to solve this difficulty and
demonstrate a satisfied optimization result. |
| Cochlear
Implant |
Christian
Berger-Vachon and Lionel Collet |
In this text, the authors recall the main principles and data
ruling cochlear implants. Then, a first circle of technical
equipment for assistance is presented. This circle includes:
device setting (DS), Electrically evoked Auditory Brainstem
Responses (EABR), Neural Response Telemetry (NRT), Stapedial
Reflex (SR) and Electrodogram Acquisition (EA). This first cycle
becomes more and more important as children are implanted
younger and younger; the amount of data available with this
assistance makes necessary the use of models (implicit or
explicit) to handle this information. Consequently, this field
is more open than ever. |
| Distributed
Real-time Simulation System Design for Integrated
Flight/Fire/Propulsion Control System |
ZHAO
Chao, PENG Ke-mao, LIU Jia-run,
SHEN
Gong-zhang, WEN Chuan-yuan |
This paper mainly deals with the total scheme and implementation
of the distributed real-time computer simulation system of the
Tactics / Mission Integrated Control System (TMICS). First of
all, the structure of TMICS and the characteristics of every
stage of the Mission were studied, and a simulation scheme based
upon LAN was formulated, then, a simplified simulation system
was proposed according to the actual experiment condition. After
that, a tactical mission process of aero-aero missile mode was
simulated in detail by the simulation system, and the results
show that the proposed scheme is practical and effective, and
the validity of the involved design method of integrated control
system is verified as a whole. |
|
Computer
Supported Cooperative Work Based Testing and Evaluation Technique for Distributed
Interactive Simulation
System |
YANG
Ming, ZHANG Bing, MA Ping,
WANG
Zi-cai |
In this paper, the authors introduce the requirement of testing,
evaluation and cooperative work supporting tools in the life
cycle of Distributed Interactive Simulation (DIS) System. A CSCW
(Computer supported Cooperative Work)-based integrated testing
and evaluation (T&E) solution for DIS system (DisT&E&CSCW)
is present in order to thoroughly support T&E activities in
the life cycle of DIS. Some key technical problems solved in the
development of the prototype are discussed, which is valuable to
the future distributed interactive simulation T&E and CSCW
tools research work. |
| WEB-based
Collaborative Data Management in Distributed Interactive
Simulation Application |
GOU
Ling-yi, XIONG Guang-leng |
Web technology is supplying more powerful support for DIS. As an
important support for DIS, database is the back-end of the Web
application. Aimed at the DIS collaborative environment in the
full life cycle of the car product, this paper proposes a
practical database design that can support the dynamical data
management in the collaboration of simulation though Web.
Referring to HLA/RTI, based on the database design, and using
current Web technology, advanced approach for the dynamical data
management is proposed. The initial combination of HLA, Web and
civil manufacture engineering is implemented. Particularly,
based on the analysis and comparison of four methods, in
connection with the engineering practice, a composite
implementation solution for data interaction is proposed. |
| Simulation
Management of Distributed Virtual Battlefield |
HU
Ya-hai, ZHANG Yu-hong, PENG Xiao-yuan |
The authors analyze the specification of layered hierarchical
software, then propose the concept of blackboard model, and
discuss the detail of its mechanism. Finally the implementation
approach has been applied to the development of the
multi-weapons aerial defense system successfully and is proved
to be effective. |
| Effect
of Network Delay on
Distributed Interactive Simulation Systems Based on High Level
Architecture/Run Time Infrastructure |
HUANG
Song, LIU Xiao-ming, SONG Zi-lin, Song
jin-yu |
The effect of network delay on distributed interactive
simulation systems based on HLA/RTI is studied. Details on the
distributed simulation environment are provided. The
instrumentation and technique of network emulation are also
provided. When the delays are emulated as 50 ms, 100 ms and 200
ms. the effects of real-time performance of the DIS System are
studied. One technique for mitigating the effects of network
transit time, time-tagging of the state data and state
forecasting, has shown that the entity location errors arising
in a distributed simulation (with up to 200 msec of network
delay) can be reduced below 0.5 m. |
| Simulation
System of Carrier Crane |
ZOU
Ji-gang,
ZHANG
Jie,
ZHANG
Rui,
LI
Wen-xiu,
LIU
He |
Based on spline function trajectory planning method, Lagrangian
kinetics equation, fuzzy control theory, and OpenGL dynamic
three-dimensional display, the simulation system of carrier
crane is founded. The function，construction
and realization of the simulation system are described in
detail. |
| Applications
of Dynamic Link Library to Simulator Program Designin |
TANG
Sheng-li, GOU Xiao-long, HE Zu-wei |
A method of using Dynamic Link Library (DLL) to design power
plant simulator program is put forward. Since many different
program languages can be used in one program designing easily,
and the program can be tested online, with this method, we can
choice program language freely during the designing period, and
much times will be saved. In this paper, the methods of building
DLL and the data transfer between the DLLs are introduced. |
| Key
Technologies and Developing State of 6-DOF Motion System for
Flight Simulator |
YANG
Hao-quan, ZHAO Ke-ding, WU Sheng-lin, CAO Jian |
As motion-base of flight simulator, parallel 6-DOF motion system
is one of the chief part in flight simulator. Its motion nature
is one kind instantaneous overload-simulating vehicle, which can
provide pitch, roll, yaw, heave (vertical), surge (longitudinal)
and sway (lateral) motion. In this paper, the state-of-the-art
and the key issues of 6-DOF motion system for flight simulator
are briefly addressed on the designer’s standpoint. And at the
same time, in conjunction with the practical experience of
design and manufacture, some desiderative theories and technique
problems are proposed. In addition, we’ll discuss some viable
developing approaches as well. |
| Research
on Warship Tactical Decision-Making System in Sea War Simulating |
WANG
Yi,
ZENG
Fen-fang,
BAI
Ying-cai |
During the research of warship command and control system based
on fuzzy reasoning, we established a framework of fuzzy expert
system on tactical decision-making. And proposed an improved
fuzzy reasoning algorithm, which could simplify the procedure of
reasoning, but would not affect the result. Meanwhile, with the
combination of 3D and 2D simulation, we mimicked the part and
the whole situation of war for one to multiple warships case. |
| Implementation
of an Interface Agent in the Field of Emulator of Space-flight
Track |
TANG
Yue-ping, WU Yan-mei, LI Yong-qiang |
The track user interface Agent is an intelligent interface.
Application of track user interface Agent in software will
improve affinity and efficiency. It’s an important side of
software engineering on AI. It can implement the cooperation of
human and computer. Its application in emulator of space flight
track will further the efficiency. |
|
Supporting Environment to Develop the Multimedia Simulation and Training
System for the Stored
Program Controlled
Telephone
Exchange |
DING
Hong, ZHENG Lin-hua, HAN Fang-jing, LEI Jing |
As a new and effective tool for research and design of complex
systems, the simulation technique is widely used in various
fields. Training simulation is an important direction among
them. To solve the scarcity of development for the MSTS
(Multimedia Simulation and Training Systems) for the SPCTE
(Stored Program Controlled Telephone Exchange) aiming at single
type, this paper advances a supporting software environment for
development of MSTS. General design is given and several key
problems are discussed. This supporting environment provides an
effective common platform for the development of MSTS. |
| Design
& Realization of Control System of the Three-axis
Electric-driven Flight Turntable |
WU
Yun-jie, WANG Wei-hong, ER Lian-jie |
The integrated design of control system of a three-axis
electric-driven flight turntable is discussed. According to the
structure of servocontrol, the realization of the hardware and
software is introduced in detail. |
| Towards
the Integrated Modeling Method of Virtual Prototypes |
ZHAO
Wen, WANG Wei-ping, ZHU Yi-fan |
The core of the collaborative design process of virtual
prototypes is the integrated model. Integrated model of Virtual
prototype (We call it VIM model) is responsible to provide the
information of all relevant sides of the virtual prototype
during the design lifecycle, and the VIM model is an important
research area of virtual prototyping. In this article, the
status in quo of research in the area of VIM model is discussed
first. Based on the analysis of the characteristics of the
integrated model of virtual prototypes, the VIM formal
description is given. |
| Computer
Simulation of Tool-post’s Position-orientation for Orthogonal
Virtual 6-Axis Machine Tool |
LU
Yi, HUANG Zhen |
A computer simulation approach to determine the workspace and
the flexibility of a virtual orthogonal 6-rod machine tool is
presented. Based on Stewart's parallel mechanism, two types of
virtual 3-dimensional orthogonal 6-rod machine tools with 6
degrees of freedom are created with advanced CAD software. The
tool-post's position and orientation for an orthogonal virtual
6-axis machine tool are simulated and analyzed in computer. In
order to make the trajectory planning and position-orientation
of the tool post, the boundary curves and surfaces of the
tool-post's working space are obtained. The tool-post's
flexibility is also determined without interference among the 6
driving rods. The results from computer simulation provide a
foundation for designing and analyzing the virtual 3-dimensional
orthogonal 6-rod machine tools. |
| Virtual
Automobile Wind Tunnel |
ZHOU
Ting-mei, WANG Zhong-fan |
Based on the solution by CFD technique for the Reynolds averaged
incompressible Navier-Stokes equation of 3D turbulent flow
around a car body, virtual automobile wind tunnels are built by
virtual reality technique. The virtual automobile wind tunnel
can present external flow field around a car body in a more
objective way than previously used CFD visual technique can,
thereby realizing a cost savings and shortening development
time. |
| On
the Application of Virtual Reality Technology to Moral Education |
LU
Yao-huai |
With the aid of virtual reality technology, we can construct a
virtual environment for ethical training. In this system, we can
design all kinds of ethical relations, and simulate various
moral problems in real life. Compared with traditional moral
education, this new form of moral education can bring about a
better effect. |
| Application
and Development of Computer Simulation Research on Airport
System |
NI
Gui-ming,
YANG Dong-yuan |
Computer simulation analysis is important way for improving the
quality of plan and design and operation of airport system. This
paper summarizes the research on airport system computer
simulation in the world. Base on these research, it analysis
insufficiency in airport system simulation. The contents that
should be further studied in airport system simulation also are
put forward. With development of computer simulation technology,
this paper points out the development way of airport system
computer simulation. |
| Two
Model Reference Adaptive Control Schemes for Following the Low
Order Model and Simulation |
WU
Zhong-qiang |
Two kinds of model reference adaptive control scheme are
designed for high order system following the low order model
with the method of reducing order by filter and decomposing
system into some factors viewed as un-modeled dynamics so as to
be translated into disturbance. The system structure is
simplified by using low order model. Simulation shows its
efficiency. |
| Optimal
Unbiased Converted Measurement Kalman Filtering in the
Mean-Square Sense |
WANG
Guo-hong, MAO Shi-yi, HE You |
The converted measurement Kalman filter (CMKF) has been widely
used for radar tracking problem. However, it has been found that
the performance of CMKF degrades considerably when cross-range
measurement errors of the target position are large. Due to the
advantage of exact debiasing of unbiased CMKF, a new Unbiased
CMKF (UCMKF) is presented. The key of the presented filter is to
derive the best estimate of the covariance matrix of the
unbiased converted measurements in the mean-square sense. For
constant-velocity target, simulation is made and it is seen from
the simulation results that the presented method can get better
performance especially when the standard deviation of azimuth
increases. In
addition, discussion is also made for maneuvering target case. |
| Importance
Sampling in Performance Evaluation of Long Range Dependence
Network Traffic |
JIN
Zhi-gang, SHU Yan-tai, WANG Ji-dong |
This paper proposes the importance sampling technology for
performance evaluation of computer networks. The importance
sampling theory and the typical algorithm in network simulation
are discussed. Given a queue fed by a FARIMA process, the
simulation results show that the long range dependence of
traffic gives rise to the overflow of queue. The importance
sampling significantly reduces the time of simulation. The
simulation results are accordance with the analysis result by
large deviation technology and other analysis result. |
|
A
Design Method for Generalized Discrete Model Reference
Adaptive Control Scheme Based on the Compensation via
Neural
Network |
Zhang
Xiu-ling |
The plant is identified by a normal linear model, and the
deviation identified by the linear model is compensated via a
neutral network. The identification model consists a linear
model and a neutral network. By using the state of model’s
output and plant’s forecast, a design method is presented for
generalized discrete MRACS (Model Reference Adaptive Control
System). It applies to linear, nonlinear, minimum phase and
non-minimum phase system.. The simulation shows that this plant
has fast response speed and can follow the arbitrary given
reference sequence. It has stronger robustness and better
control precision. |
