Title

 Author

Abstract

　Simulation Study on the CGF Entities of Tank Element

　HAN Zhi-jun, XU Ke-hu, LI Meng

Tank element CGF entity model is an indispensable part of developing fight simulation systems of army. Starting with building the abstract model of CGF entity’s behavior, it studies CGF tank entity on expression, production and controlling the method of behavior. In analysis the classification of CGF entity model is used in the simulation system of tank element fight. It realizes the formulation method of the general physics behavior especially, including the locomotion, reconnaissance, fire, outside trajectory, and cannon scattering model of CGF tank entity, and studies the method of aggregating entity realization, such as route program, formation changing, firepower employment of the tank element in virtual battle fields. Finally, setting about from artificial intelligence theory, it carries on the theory study at the advanced intelligent behavior simulation method of tank element entity and puts forward corresponding implementation methods, so as to lay the foundation emulation about training simulation system for practicality development in the future.

　A Simulation Research for Chaotic Micro Mixer Based on Lattice Boltzmann Method

　LI Chuang, CHEN Tian-ning

Micro mixer is an important part in bio-microfluidic chips. Since the cross section of the channel is of micrometers scale, the analysis would not get satisfactory result if we use general fluidic FEM. In this paper, a lattice Boltzmann method was used to simulate the characteristics of a micro mixer. Based on the computation of the flow speeds in the chaotic micro mixers with oblique grooves on the floors, the dispersive mixing processes of the trace sample particles in carrier flows were simulated, and the relation between mixing standard deviation and mixing passage length for the sample particles was investigated, which was found consistent with Gauss curve pattern. The simulation results agree well with the experiments data in the literature. Above results show that the lattice Boltzmann method could be used as a powerful tool for the researches of microfluidic mixers and microfluidic chips.

ANN-based Intelligent Simulation on Flow Field

GU Zheng-hua, TANG Hong-wu, GAO Zhu, Li Yun, Xiao Yang

On the basis of Flow Intelligent Model (FIM) conception from Gu Zheng-hua and Tang Hong-wu, penetrating frame-tetrahedron’s wake field was simulated through artificial neural networks method, and a new idea was provided on flow field’s simulation. Through flume experiment with Acoustic Doppler Velocimeter (ADV) system, nine kinds of penetrating frame-tetrahedron’s wake fields on the different conditions were measured as learning and testing samples of penetrating frame-tetrahedron’s FIM. The expression of the wake field’s intelligent model was obtained by training, and its’ simulation result was consonant with prototype. Conclusions illustrate that FIM-based ANN will be prosperous for its’ rapid simulation speed, good extension generalization capability and tolerance, and high precision.

Two Artificial Intelligent Methods Applied in the Identification of Geothermal Heat Pump System

ZHAO Li-li

Artificial Neural Network (ANN) and Genetic Programming (GP) Algorithm were used to identify the geothermal heat pump system (GHPS). Judging from the result data, the average errors of two models obtained by ANN and GP Algorithm respectively are within 7%. So it is feasible for artificial intelligent methods to solve the identification problem of geothermal heat pump system (GHPS). And Genetic Programming (GP) Algorithm has a potential capability to solve the optimal design and control problem in the field of HVAC.

Study on VV&A for Simulation Model of Phased Array Radar

LUO Jia, LI Yong-zhen, WANG Xue-song, ZHOU Ying, XIAO Shun-ping

The validation, verification and accreditation (VV&A) method for simulation model of phased array radar is discussed in this paper. At first, the conception of VV&A is briefly reviewed and the factors that influence the validity of simulation model is analysed. On the basis of the coherent video simulation, the paper studies some methods of verification of the basic model, especially focusing on the verification of power and precision of the radar simulation system. The methods in this paper were testified practically to be available.

A Kane Formulation for the Inverse Dynamic of Stewart Platform Manipulator

ZHANG Guo-wei, SONG Wei-gang

A formulation based on Kane Equation was educed for the dynamic of the Stewart platform manipulator from the kinematics analysis of the model. The velocity and acceleration between platform and driving poles were deduced. The progression of velocity of centroid and angle velocity of platform was looked as the generalized velocities. We obtain compact expression. These expressions should be interesting from a control point of view. In the end, two examples for a test manipulator model were used to simulate the dynamic of the parallel manipulator. Kane approach doesn’t explore the constraint force of joints and the derivatives, so it can be easily implemented by computer.

Simulation and Research of Multiple Parallel Interference Canceller

WU Qi, SHEN Min

Due to comprise of performance and complex, parallel interference canceller (PIC) is one of the most feasible multi-user detection technologies in CDMA system. However, the performance of PIC is easy to suffer from the estimation bias of interference. In order to solve this problem, it is researched and simulated an improved PIC in this paper. The results show that the improved PIC can increase performance and get better BER.

The Orbit Perturbation Calculator Simulation to an Autonomous Orbit Determination for Satellite

XUE Shen-fang, SUN Cai-hong, NING Shu-nian, JIN Sheng-zhen

presents an expanded Kalman Filtering nonspherical perturbation model to an autonomous orbit determination for satellite with large field sensors. In this filtering algorithm, the traditional one-step forecast is modified into one-step elementary forecast and the correction to it. The simulation shows that the precision of the mean square deviations of position and velocity is high. The orbit variation in one day under the nonspherical perturbation is shown and the motion of the orbit plane is computed.

Payload Oscillation Modeling and Error Analysis for Rotary Crane

DONG Ming-xiao, ZHENG Kang-ping, JIANG Hong ,et al

According to the characteristics of payload oscillation on a rotary crane, a polar coordinates system and a non-inertial Cartesian coordinates system were set up. The linear and non-linear models of payload oscillation under the operating conditions of simultaneously traveling, slewing and hoisting or lowering were built based on the general form of Lagrange’s equation. The errors resulting from the linearization process were analyzed quantitatively. The influence rules of dynamic parameters on the oscillation frequency, maximum amplitude and the tilted offset of the oscillation central axis were presented. Therefore the dynamic performance of the system can be described more accurately so as to provide the theoretical basis for the anti-swing control of the rotary crane.

A Model Identification Software Design for Complex Industrial Processes and Its Application

WANG Yue-xuan, HU Xi-xiang, LIU Lian-chen, WU Cheng

An effective model identification software is immediately needed to help to construct dynamic mathematical model in practical industrial processes because it is hard to be constructed from the real time experimental data under the corresponding producing environment. According to the global identification technique based on parametric dispersion and the multi-layer distributed component technique, a model identification software is designed for complex industrial processes with characteristics of open, generalized and component. The detail design scheme and functions are introduced as well. The software is applied to a practical industrial process and the results show that it dramatically improved the efficiency of modeling in industrial process.

Sampling Strategy in the Profile Measurement of Mill Roll

JIA Lei, PEI Ren-qing, YAO Guang-xiao

The profile of mill roll is measured with the error separation technology and uniform sampling method. In this paper, the important sampling strategy in the measurement process is investigated. The strategy includes how to choose the sampling numbers and set the range interval between sensors. Not only is the sampling numbers determined with probability theory, but also the influence of parameter setting in the following filtering process is considered. When determining the range interval between sensors, the effects of it on the spline interpolation and statistical process are also studied. Finally, the optimum sampling strategy is found.

The Multi-stage Blind Phase Estimation Algorithms for High Order QAM Signals and the Simulations of their Performances

XU Hua, GUO Jian-xin, ZHENG Hui

the blind phase estimation algorithms and, especially, the acquisition algorithms for high-order QAM signals are studied and some new multi-stage phase estimation algorithms are presented. Compared with the other ones presented before, they have much better performance with the cost of introducing some delays. And the simulation results show that the multi-stage algorithms with various structures have different performances, so the algorithm should be selected according to the requirements of practical application.

Numerical Simulation of Two-dimensional Metal Cutting Process

XIE Feng, ZHAO Ji-wen, Liu Zheng-shi, ZHANG Chong-gao

Based on the numerical simulation and FEM software, the chip forming and the stress-strain distribution in cutting zone for the two-dimensional metal cutting process have been simulated, and also the shearing angle and the change of cutting force in the beginning of metal cutting process have been calculated. Through experiments, the feasibility of this method is confirmed. This method is new and unique. Its application will be helpful to the analysis of metal cutting principles and to the design of the cutting tool.

Simulation and Evaluation of Phased Array Radar’s Tactical Ballistic Missile Defense Capability

YANG Li-bin, WANG Xue-song, DAN Mei, XIAO Shun-ping

The problem of evaluation of a multi-function phased array radar’s tactical ballistic missile defense (TBMD) capability has been highly concerned for years. The TBMD process, in which a multi-functional phased array radar is involved, is studied by using the technique of modeling and simulation of radar and electronic war (EW) systems. On the basis of simulation models of radar and EW systems, which are constructed at the signal level, simulation software is developed. In typical anti-TBM scenarios under the conditions of stealth targets and electronic countermeasures, simulation experiments are conducted. Simulation results provide effective supports for the evaluation of phased array radar’s TBM defense capabilities.

Simulation Study for the I~V Characteristic of the High Temperature Superconducting Bicrystal dc SQUID

QI Han-hong, TIAN Yong-jun, WANG Tian-sheng, ZHENG Dong-ning

The equations which describe the characteristics of the dc SQUID are concluded according to the equivalent circuit theory of the dc SQUID in this paper. The simulation study for symmetrical high temperature superconducting bicrystal junctions dc SQUID using Matlab software is also carried through. The simulation results indicate that the output voltage of the dc SQUID changes periodically along with the outer flux and the periodical cycle is the flux quantum Φ₀. The simulation study also provides effective reference for deciding the parameters of the fabricated dc SQUID.　

Research on Disc One-cone Bit’s Working Performance Simulation

WANG Guo-rong, LIU Qing-you

Along with the oil prospecting and production, the existent drilling bit (steel and tungsten carbide tooth bit) was not effective in some complicated stratum. In this situation, Southwest Petroleum Institute developed disc one-cone bit. This kind of drilling bit had some excellence performance such as little torsion, high bottom-hole coverage coefficient, long bearing life and so on. And the bit has expansive application foreground in deep drilling. The main content of this paper is the simulate study on its working performance. Under some appropriate supposition, this paper established the simulate model, and developed the simulate software. Compared the result of the simulate model with the experimental data that collected by the Lab. of Drilling Bit in Southwest Petroleum Institute, the model has been validated. With the simulate program, the simulate study on the working performance of disc one-cone bit had been done in different conditions such as different drilling parameters, different bit structure, different rock performance and so on, which was the theoretic reference to the design of disc one-cone bit.　

Dynamic Simulation of High-Speed Tracked Vehicle Suspension System

SHI Li-chen，WANG Liang-xi，ZHANG Bing-zhi

High-speed tracked vehicle suspension system dynamitic response on irregular ground (including obstacle) was concerned in this article. Theory of multibody dynamics was used to setup the motion equation of interaction between vehicle suspension and road surface. And track loop contribution to vehicle dynamic equation were also considered of which track loop was regarded as forces on chassis and road wheels composed of track dynamics force and track loop tension. According program was developed through Matlab/Simulink to solve these mathematical models with animation output on PC. Case analysis proved to be acceptable and show that the model and its method can be used for armored tracked vehicle suspension design and dynamical analysis.　

MATLAB-Based Dynamic Simulation of Tracking Control of Nonholonomic Dynamic Systems

SONG Zuo-shi, YI Jian-qiang, ZHAO Dong-bin, LI Xin-chun

The simulation problem of tracking control of nonholonomic dynamic systems is addressed. The simulation model consists of model module, controller module and connection module connecting model and controller. The three parts are built by using the combination of Simulink and S-function in MATLAB and the connection module exhibited clearly nonholonomic constraint relation which is difficult to handle. The simulation results were given to demonstrate the effectiveness and feasibility of the proposed scheme. The proposed model provides a new approach to simulate the tracking control problem of nonholonomic dynamic systems. It is also helpful to design and optimization of nonholonomic dynamic systems.　

The Research and Realization of a Real-time Management Model of Engineering Flight Simulation

PENG Hua, SHEN Wei-qun, SONG Zi-shan

In the development of a large engineering flight simulator, this paper has built a service-object oriented model of the real-time management system. This model is based on the customer/server model and has been applied to realize rapid constitution of a complex simulation system. In the paper, the structure and functions of the simulator has been introduced. Then the construction of this model has been fully expounded. And the realization of this mode has been described in detail.　

Modeling and Simulation of Torpedo Trajectory Using WISE

NIE Wei-dong, KANG Feng-ju, CHU Yan-jun, GU Hao

Aiming at the disadvantages in developing integrated simulation software using current simulation languages for weapon continuous system, such as long developing period, difficulties to set up standardization and low reusability, this paper discusses the visualized and modularized modeling method provided by WISE (Weapon system Integration Simulation Environment). Using this method, various granularity reusable models are designed and integrated simulation software is generated, which can be run independently without WISE environment. For practice, a torpedo trajectory 3D demo simulation system has been build. And the method has been verified that it is a flexible effective method in designing reusable models.　

An Intrusion Detection System Based on Load Balancing

LI Ren-fa, LI Hong, YU Fei, XU Cheng

The processor's development speed has already fallen behind that of network development. So, at present, how to realize real-time intrusion detection has become a problem which network security is confronting with. By redesigning current IDS's hardware structure and algorithm, this paper presents an intellective load-balancing algorithm based on genetic algorithm on network and establishes a corresponding instruction detection model. In the end of paper, there is an emulation experiment to this improved algorithm. The results of experiment show that improved algorithm can increase the system performance.　

Design and Development of Reusable Dynamic Simulation ModelBase Based on MATLAB

LIU Xing-gang, YUAN Feng-hua, XU Xin-he, et al

The framework of simulation ModelBase is designed in this paper to satisfy the requirements of analyzing the technical and control model of cold rolling process. The function partition and the object-oriented hiberarchy structure of the system are introduced in detail. Based on the MATLAB simulation platform, the reusable technology is applied to construct ModelbBase, and S function blocks are programmed , supported by the DDE of MATLAB, to execute the data exchange between simulation system and the field monitoring platform ONSPPECT. The concrete example is provided at the end of the paper, which can be used for reference by other applications.　

Construction of a New Simulation System Combining Hardware and Software for Underwater Vehicles

KANG Feng-ju, GAO Li-e, YANG Hui-zhen, et al

To satisfy the requirement of high accuracy simulation of complicated control system of underwater vehicle, a new plan of simulation system consists of AD/RTS simulation workstation, triaxiality rotated-table, water pressure simulator and visual simulation workstation was put forward. Furthermore the real-time communication between the three platforms interconnected by reflective memory was realized. Using Simulink combined with C/C+ + programming, modular simulation model of underwater vehicle was built. In the end, the simulation system was tested. The simulation result shows that it completely satisfies the real-time requirement, and it is valuable for the underwater vehicle design and research.　

Data Fusion Managing and Jamming-effect Evaluation System for Tail-end Compound Guidance

PENG Hao, WANG Guo-qing, YANG De-gui, LI Xiang

As for a few typical compound guidance and under given compound rule, it is designed and realized a semi-physical emulate system for evaluating the anti-jamming ability of tail-end compound guidance. The system is based on the data from six tail-end guidance sensor on-earth and the GPS data of target. After coordinate-transition, on-missile fusion, trajectory imitate, we give the result for anti-jamming ability. It provides technique sustain for weapon development.　

A PC-based Simulation Platform for Unmanned Aerial Vehicles (UAVs)

DONG Miao-bo，SUN Zeng-qi

A PC based simulation platform for unmanned aerial vehicles (UAVs) is introduced. The application is constructed using MFC Document-View framework. The componentialized system structure is employed, providing strong flexibility and expansibility. The function and the interface of the application are introduced finally.　

Research on Train Running Line Simulation System

ZHOU Lei, YU Zu-jun, SHI Hong-mei

introduces the whole function and architecture emulate system and describes emulation theory and technique of the whole emulate system, for instance, the traction force, the brake power, the operation emulation of running resistance and the emulation of route graph and material object landscape. It is also represented in detail the simplified process for differential equation of train running in the emulation process while train is in motion, and the way of seeking changeable slope point in the route ramp process emulation. Moreover, it also focuses on presenting the control method adapted the latest multimedia techniques to realize the synchronism of route image in visual landscape emulate process; the technology that realizes smooth-speeded change by inserting frame when the train is in motion slowly.　

Real Time Simulation of SHEV Powertrain System

CHENG Xi-ming, XU Liang-fei, HE Bin, et al

About the powertrain of a series hybrid electric transit bus, one simulation model and its real time methodology were presented. Based on MATLAB/Simulink^®, the dSPACE controller and xPC target were integrated by the CAN technology. The former emulated the system control unit, and the latter personal computer ran the system model. At the same time, another personal computer monitored both of them and logged. On the novel real time platform, the model and its system controller of the SHEV powertrain system were simulated. The results testify that the real time simulation makes the system operation clearer, validates the real time control algorithm, and builds up the quick prototype of the vehicle control unit.　

Research on A Software Architecture Framework for Knowledge Base System

LI Long-shu, NI Zhi-wei, YE Hong

Advanced applications in fields such as expert system, real-time process control, problem solving, machine learning require the construction, efficient access and management of large, shared knowledge bases. Such knowledge bases cannot be built using existed tools such as expert system shells, because these do not scale up, nor can they be built in terms of existing database technology, because such technology does not support the rich representational structure and inference mechanisms required for knowledge-based systems. This paper proposes a generic architecture for a knowledge base management system intended for such applications. The software architecture assumes quotient space structure which analyses identic problems in different granularity space. A new software architecture model for knowledge base system based on quotient space is given. The atomic component, quotient component, connector and configuration are defined. It is described building a knowledge base system framework for agro-meteorology. Some components and a configuration about agro-meteorology are given. All above work sets up basic theory of software architecture for knowledge base system based on quotient space and provides new way for further research.　

A COM-Based Multiple Mobile Robot Simulation System

HU Rong, WANG Shuo, CAO Zhi-Qiang, TAN Min, TU Xu-Yan

A system framework and architecture based on COM technology are presented for multiple mobile robot simulation system. Based on this architecture, a simulation system is designed and realized, in which mobile robot controllers are provided as COM components. COM is a kind of object model released as component unit, which can be reused and can interact with the client in a transparent way. The characteristic of COM corresponds well with the property of distributed system. Multiple mobile robotic simulation system based on COM works well in distributed simulation environment and can be interacted real-time as well, which facilitates the research on multiple mobile robot system.　

Design and Implementation of Multi-resolution Modeling Based on HLA

LIU Bao-hong，HUANG Ke-di

Multi-resolution modeling (MRM) used for connecting models of different resolution is one of the key technologies in HLA-based distributed simulations. In this paper, after introducing some essential concept of MRM, we concentrate on how to design and implement the HLA-based multi-resolution modeling framework (MRMF/HLA). First, the design goal and the scheme are given. Then, we discuss the design of FOM used for MRMF/HLA, the base class for MRM, the class for MRM service in detail. The implementation of MRMF/HLA main functions of is also given. At last, the plan for next step study is proposed. The realization of MRM/HLA makes it possible for the model developers to develop models of multi-resolution in a rapid and standard way. It also exhibits a feasible way of adding some extended common service into RTI.　

Torpedo Weapon System Simulation Environment Design Based  on High Level Architecture

CHI Gang，WANG Shu-zong

Distribute simulation base on High Level Architecture (HLA) is the direction of system simulation development. This paper preliminary researched torpedo weapon system simulation under HLA simulation environmental, came up with basic frame of torpedo weapon system simulation software, and then simulated and analyzed the operational effectiveness of torpedo weapon system under diverse battlefield environment on the foundation of this frame. Finally some conclusions were drawn.　

Research on Implementation Technique of the LAN-based Distributed Real-time Simulation

LI Shao-yan, HUI Tian-shu, CHEN Zong-ji

The real-time characteristic of the LAN-Distributed Real-Time Simulation System (LDRSS) was analyzed in detail. The quantitative analysis of real-time was given and the necessary and sufficient conditions satisfying the real-time requirements were presented. The real-time performance of LDRSS was described by the defined Real-time Simulation Redundancy. The real-time characteristics of general network transfer modes, Broadcast, Unicast and Multicast were contrastively analyzed and Multicast mode was regarded as the best selection for the LDRSS. Finally, the above-mentioned theory of LDRSS was successfully applied to analyze the real-time performance of an aircraft simulation system.　

Force Computation and Rendering Method for Real-time Force Display

WANG Dang-xiao, ZHANG Yu-ru, WANG Yu-hui, et al

This paper discusses force computation and rendering method for simulating contact interaction between handheld tool and static environment. Static object in virtual environment is modeled using triangle mesh, and dynamic tool is modeled using point-based model. Based on principle analysis of the haptic display device, the difficulty of virtual force computation is explained firstly. Then, virtual force computation process are divided into two phases, collision detection and collision response. In first phase, uniformed spatial partition method is used to accelerate collision detection; in second phase, minimal distance iteration method combined neighborhood topology is utilized. Force-rendering method is introduced to achieve the tradeoff between fidelity and stability, and rendering criteria is proposed to meet the requirement for displaying different geometry features on the virtual object. Haptic display platform is constructed using Phantom, and several objects with typical geometry features are selected to evaluate system performance. Good fidelity and stability result indicate the validity of the force computation and rendering method.　

Research on Getting D Navigational Maps of the VR Scene

WANG Jiang-chun, LUO Jian-qiang, ZHANG Shen-sheng

Virtual reality provides a versatile view for us, and it has become a popular interactive way between computer and human. Although a lot of virtual scenic resources can be found in the Internet, it’s a big problem to use these shared resource to create a new virtual world. The lack of a 2D navigational map for path planning is an obstacle, which constricts the selected scope. In this paper, a simulated controller approach, which composes the map with motion traces acquired on tracking moving viewpoints of a simulated user in the virtual scene, is proposed to overcome it.　

An Algorithm of Mapping Additional Scalar Value to Imaged Based Vector Field Visualization

LU Jian-feng, PAN Zhi-geng, ZHANG Ming-min, LIANG Jian-dong

Line Integral Convolution (LIC) method is a powerful technique for representing directional information in vector field visualization. To Display multidimensional information on the output image, some methods such as color mapping and tone mapping are developed to show the direction, orientation and magnitude of the vector field. In this paper, we propose a new method that maps additional scalar values to the local contrast of the output texture.　

Research on the Virtual Prototyping Platform of Hydraulic System

CHEN xin-yuan, ZENG liang-cai, CHEN kui-sheng, ZHOU yun-gen

investigates the feasibility of establishing virtual prototyping platform for hydraulic system design. We develop the platform design software based on SolidEdge, Ansys, Matlab and Access. This software is helpful to choose hydraulic component, create 2D principle drawing and engineering drawing, make 3D models, simulate assembly, and simulate operation and develop 3D virtual product on the internet. The hydraulic application center of Panzhihua Iron and Steel Group has applied the platform design software to the design of piston servo cylinder test system, and the result proves that the platform design software can reduce the cycle time and cost of product development and improve the quality of design.　

A Virtual Collaborative Design Space for Integrated Missile Design

MEI Shan, ZHAO Wen, WANG Wei-ping

The integrated design of missile weapon system is quite complicated, which challenges the sharing and optimization of models and design parameters. This paper first presents the conception of Virtual Collaborative Design Space on the basis of technology of Virtual Prototype and Computer Supported Cooperative Work, then brings forward the architecture of Virtual Collaborative Studio for Integrated Missile Design and Optimization (VCSIMDO), and finally accomplishes a prototype system.　

Simulation Study of Fault Detection and Diagnosis on Three-phase Sine-PWM Inverter

WU Xiao-hua, SHI Zhong-ke

Nonlinear MATLAB simulation model of three-phase sine-PWM inverter was setup. The data matrix made up of the learning samples of the neural network was obtained by simulating the fault types of the switch off of the switches in the inverter. After training the network, the optimum structure and parameters of fault diagnosis system were achieved. The well-designed training set was verified by simulation test. The simulation result proved that the model was correct and the diagnosis method was feasible.