Title

Author

Abstract

Modeling and Control Research of the Triple-Evaporator Air-Conditioner with Inverter

CHEN Wu, CAI Zhen-xiong, ZHOU Xing-xi

The interaction between different evaporators complicates greatly the control characteristics of the triple-evaporator air-conditioner, which makes it hard to control and mathematically model. Based on component models and a new methodology, herein a system’s transient thermodynamic model of the triple-evaporator air-conditioner was established. Control strategies featured with refrigerant suction pressure control, of the variable-speed compressor and electronic expansion valve were proposed. A fuzzy control method with modifying factor was used and the simulation research on the control strategies and method proposed here was carried out. The simulation results show that the control strategies and method are feasible and can achieve satisfying control results.

Research on the Model of the Interception of Anti-ship Missile by Phalanx Close in Weapon System

SONG Gui-bao, KONG Li, LI Hong-liang, LI Yi

Interception of anti-ship missile by phalanx close in weapon system needs the solution urgently. Based on the application of this system in the ship defence, phalanx close in weapon system is introduced in this paper, the anti-ship missile interception model of phalanx close in weapon system, average need hitting number and the penetration probability of the missile are founded. Meanwhile the creditability of the model is validated.

Research on the Methods of SoC System Modeling and Simulation in YH-PBDE Environment

ZHAO Peng，XIONG Zhi-hui，LI Si-kun

This paper puts forward a novel SoC system modeling and simulation method based on Constrained Taskflow Graph (CTG) as SoC system model, and implements a SoC system modeling and simulating tool in YH-PBDE environment which supports SoC SW/HW co-design. The tool can describe the SoC system behavior accurately and simulate the system at arithmetic level. It can support system re-use effectively. The example of Digital Soldier Audio/Video Decoder proves that this method ensures the accuracy of development and reduces the time of up-to-market.

A Multimodal Integration Model of Military Control System

HUANG Bo, ZHOU Fang, SUN Ya-min

A method of modelling multimodal integration in military control systems is proposed in this paper. Every multimodal task is decomposed into a group of meta-actions according to some key information and the integration is complete when feature structures have been fully filled by meta-actions according to some rules. An event-classified table and a meta-action table are used to make multimodal integration independent of the specific tasks. In the process of integration hybrid fusion method is used. At the end of the paper, some design rules of multimodal integration in military systems are given

Study on Combat Agent Model

HE Jian-min, WANG Yuan-yuan, MIN Rui

Warfare is a typical complex adaptive system. Agent-based simulation is a new approach to analyze complex systems. This paper introduces the basic concept of agent, Multi-Agent System, and agent-based simulation. It gives an example of modeling the combat agent under the situation of combat simulation. The characteristics of agent-based simulation over the traditional simulation methods are discussed in this paper. The expectation of future research work is finally proposed.

Simplified Linear Macromolecular Dynamics Model

LIU Yang, FU Zhuang, ZHAO Yan-zheng, CAO Qi-xin

Molecular kinetic simulation is one of the important issues of computer aided drug design (CADD). To model the state of low-energy configuration of linear biomacromolecular by simplification, this article presents the “ball-virtual spring” structure model to simulate the transverse flexing vibration and torsional vibration, and probes into the mechanics affecting the flexibility of linear macromolecular in theory. The model has profound applications in kinetic simulation of linear macromolecular.

Improved Real-time Ocean Wave Mesh Model

XIE Cui, JIN Yi-cheng, LI Zhi-hua, LIU Xiu-wen

We present an eye-point related adaptive ocean surface mesh model for real-time simulating irregular long crest waves in navigation simulation system. The method restricts computations to the visible part of the ocean surface in each view channel, the generated mesh density transition is continuous and an adequate resolution being maintained everywhere in the computed ocean image. The method provides a flexible control of the quality/cost ratio by adjusting the mesh density and the number of simulated unit waves. The method allows the user to move over an unbounded ocean following the own-ship, and immersed in a real-time updated photo-realistic ocean environment.

Research on Behavior and Plan Model of Virtual Human

The architecture of virtual human is presented based on agent theory in this paper. The architecture of virtual human includes sense module, perception module, plan module, behavior module, action module, database module, knowledge base module, emotion module, internal variable module, and motor control module. These modules are integrated as a system. This paper mainly introduces function of plan module and behavior module. The behavior of virtual human is expressed with productive rules, each productive rule has different prior degree, synthetic operation can be set up among different behaviors, and inhibitory gain coefficient and fatigue coefficient is used to represent sequential feature of behavior. At last, a behavioral animation system based on the model in this paper is realized on PC.

Modeling Methods for Medical Simulation Calculation with the Code MCNP

MCNP is a general-purpose Monte Carlo N-particle code that can be used for neutron, photon, electron, or coupled neutron/photon/electron transport. It’s used widely, but it is very complicated to construct its simulation model, especially when it is used in medicine field. MCNP often cannot run because the calculation model goes beyond the limit of MCNP geometry disposal capacity. Three modeling models with their own specialty will be put forward in the paper. According to these methods, the author programmed to realize MCNP automatic modeling and automatic conversion into MCNP input files. The program has been put into practice, and the result is satisfied.

Modeling and Simulation of Route Active Lock

Based on the RNA (Routing network algebra), a new method for modeling Route Active-Lock is proposed. By analyzing the RNA expression of route Active-Lock, it illuminates reason of route Active Lock. Following this point of view, an algorithm for testing Active-Lock is proposed, which partly solves the problem of testing route Active-Lock. To support our viewpoint a simulation experiment is designed by SSFNET, and the experiment result further demonstrates the validity.

The Complemental Proof of Recursive Least Square Algorithm

QIN Ting, CHEN Zong-Hai, LI Yan-Jie

When using Recursive Least Square Algorithm, it is merely considered the case that the equations composed by the preceding sample data are contradictory equations. By further theoretical proof and analysis, it is concluded that at any th step, the estimated values of the unknowns converge to the minimum norm solution if the equations composed by the preceding sample data are compatible equations or minimum norm least square solution in case that they are contradictory equations，Moreover, the solution is unique. The simulations also testify the validity of this conclusion.

Scheduling Simulation System of Hybrid Flow Shop and Algorithms Analysis

CHEN Yu-wang, YANG Gen-ke

This paper studies the scheduling problem of hybrid flow shop under the objective of minimizing makespan. The design of scheduling simulation system is given in the paper. The system consists of three modules: database, algorithm and control center; in the algorithm module, numerous heuristic algorithms extended from flow shop are used to sort jobs, and then First Available Machine rule is applied to allocate parallel machines. In addition, the paper proposes a heuristic algorithm which is based on virtual machine and the slope index of Palmer to sequence jobs. Extensive experimentation with different problem sizes is conducted through the scheduling simulation system. The advantage of the algorithm proposed in this paper is demonstrated by both simulation results.

A Matrix Method for Coherent System Analysis

Probabilistic Security Assessment (PSA) is an efficient method for complex system analysis. The coherent system analysis is a key issue in PSA and is boolean expression deduction substantially. Matrix calculation can be realized easily in computer. This paper gives the definition of disjunctive normal formal matrix and its formulae, and boolean operation is changed to matrix form. Based on that, the concept of extended disjunctive normal formal matrix is presented. Then it presents the matrixing method using analysis tree for coherent system analysis. The method is put into practice by programming and shows good results. This method can be applied not only to coherent system static analysis, but also to coherent system dynamic real time simulation analysis.

Simulation for Sound Radiation of Structure Based on Virtual Boundary Element Least Square Method

CUI Zhe, HUANG Xie-qing

In this paper, virtual boundary element least square method is applied to study structural sound radiation. The formula of virtual boundary element least square method is founded and the computer program is coded to calculate the acoustic radiation of the structure. Compared with the general boundary element method, numerical treatment for singular integration is avoided, and the coefficient matrix is a symmetrical one. The simulation result of these numerical examples show that the method is simple and efficient, and has higher calculation precision of the near-field of acoustic radiation. The method can also overcome the non-uniqueness problem effectively. It can be suitable for engineering application.

Image Resolution Enhancement Based on Dyadic Wavelet Transform

ZHAI Guang-tao, XU Jin

One common task of image interpolation is to enhance the resolution of the image, which means to magnify the image without loss in its clarity. Traditional methods often assume that the original images are smooth enough so as to possess continues derivatives, which tend to make the edges of the interpolated image blurred and over-smoothed. We propose a novel image interpolation algorithm based on wavelet transform and multi-resolution analysis, which estimates the higher resolution information of the image and extrapolates a new sub-band of wavelet transform coefficients to get processed image with shaper edges and preserved singularities.

The Hybrid Structure Optimization Algorithms of Radial Basis Probabilistic Neural Networks

ZHAO Wen-bo, YANG Lu-yi, WANG Li-ming

The recursive orthogonal least square algorithm (ROLSA) is used to optimally select the hidden centers vectors of the radial basis probabilistic neural networks (RBPNN). The micro genetic algorithm (mGA) is applied to optimize the controlling parameter of the kernel function, and is combined with the ROLSA, i.e., ROLS-mGA, so as to optimize the overall structure of RBPNN (including controlling parameters of the kernel function and hidden centers vectors). The experimental results show that the ROLS-mGA has good optimization performance. Furthermore, in the generalization ability, the networks optimized by ROLS-mGA have no loss of performance. The experiments demonstrate that ROLS-mGA can also be employed to optimize the radial basis function networks (RBFNN).

Research of an Efficient Simulated Annealing Algorithm in the Very Low Bit Rate Speech Coding

ZOU Xia, CHEN Liang, ZHANG Xiong-wei

An improved simulated annealing algorithm is proposed and applied to the 600bps speech coding to solve the problem of low quantization SNR and the poor performance in noisy channels. First, the algorithm is used to design the codebook of the speech coding parameters. And then, simulated annealing algorithm is employed to assign binary codewords to the codebook to improve the speech quality in noisy channels. Simulation results show that the quantization SNR of the algorithm is about 0.4dB better than that of the traditional LBG algorithm, and the improvement of average distortion per bit error exceeds 60% compared to randomly selected codewords. The result of informally subjective listening test indicates that the intelligibility and naturalness of the 600bps vocoder is quite well. Furthermore, the speech coding algorithm is robust in a noisy channel with 1% BER.

A Chip-Increment Support Vector Machine-based Algorithm for Multi-user Detection

YANG Tao, XIE Jian-Ying

Multi-user detection (MUD) in code-division multi access (CDMA) system is in essence of a problem of blind source separation (BSS). This paper firstly presents a pre-separation framework based on spreading code for mixed signal at uplink receiver, and then formulates a multi-object classifier through one-against-one mode. A chip-increment learning algorithm is implemented in classifier to obtain the desired sign information. Finally the simulation is given to support the theoretical result.

An Efficient Lossless Compression Algorithm for a Kind of Two-Dimension Vector Maps

ZHONG Shang-ping, GAO Qing-shi

Aimed at the memory characteristic of two-dimension vector map files, we propose an efficient lossless compression algorithm. Firstly, different lossless geometry compression transforms are applied to point-files, line-files and region-files. Then, our algorithm is integrated with needless appended-code-book dictionary-based compression scheme and the famous BWT Block-Sorting text compression algorithm. Results of experiments with practical map a show that our algorithm is fairly good in efficiency, and the algorithm is very simple.

A Data Reduction Algorithm Using Clustering Based on Rough Set Theory

YANG Tao, LI Long-shu

To the question of the optimization of the enterprise resources, the study presented in this paper reduces the original data with clustering algorithm firstly, and eliminates the suspicious information, which makes the data consistent. Then the data are made a qualitative analysis and reduced based on rough set theory. The data are reduced in both horizontal and vertical directions by using hierarchical clustering and rough set methods. The favorable economic profit can be obtained by using this algorithm in the process of the optimization of the enterprise resources configuration.

Hough Transform (HT) and Logic Based Track Initiator in Three Dimensional Space

WANG Guo-hong, SU Feng, HE You

Under heavy clutter conditions, Hough transform has been used to initiate in the two dimensional space, but it has not been used in the three dimensional space yet. The paper presents a new Hough transform (HT) and logic based track initiator in the three dimensional space. First two projecting planes are chosen in the three dimensional space, then HT and logic based track initiator is applied respectively in the two projecting planes, and finally two tracks initiated in the two planes are compared to initial track in the three dimensional space. Simulation results show that this algorithm is effective to initiate tracks quickly in the three dimensional space in clutters environment.

Modular Model Library and Simulation of Turbine-fan Engine

CAO Yuan, JIN Xian-long

The design and development of new turbofan engine is time consuming and expensive, while computer simulation is a promising method to solve the problem. Based on the object oriented technology and new simulation tool---- Dymola/ Modelica, the paper gives a design pattern for developing a generic modular-modeled library of air gas turbine and then builds it. The hierarchical structure, extensible and standardization are the characteristics of this library. It enables users to customize and extend the framework to add new functionality or to adapt the simulation behavior as required, and it allows new models to be composed programmatically or graphically to form more complex models. The model library can be used in steady state and transient state analysis of the aero engine. It is also a user-friendly, accurate, fast PC-based and easily reusable simulating tool. A double tools turbofan engine with switch reluctance generator model is constructed based on this library. The model and the library have been validated through simulation.

Data Distribution Management Based on The Layer of Interest

LIU Cheng-gang, ZHOU Zhong, WU Wei

Data Distribution Management (DDM), which is a service defined by HLA interface specification, uses a value-based filtering mechanism to further enhance federates’ ability of interest expression and data extraction. So it can discard the irrelevant data, lower network and host communication. In this paper, a DDM filtering mechanism based on the Layer of Interest is designed, combing some current mechanisms. We try to balance the filtering efficiency and computation.

Design and Implementing of Simulation System for Battlefield Versatile Defense

HAO Yu-long, ZHANG Hong-jun, SONG Xiang-bin

Based on the research of battlefield versatile defense system, a method is proposed of using muti-agent to design battlefield versatile defense simulation system. Furthermore, a deep research is made on how to implement the system based on the component model of EJB and JMS (java message service) driven mechanism. The evaluating model of capability of battlefield versatile defense is built and the simulation results are analyzed.

Petri Net Model for Reconfiguration of Fault Diagnosis Multi-agent

FAN You-ping, CHEN Yun-ping, SUN Wan-sheng, MA Xiao-xiao, HUANG Xi-yue

To adapt the model in reconfiguring fault diagnosing to dynamic environment and the needs of solving the tasks of complex system fully, based on the thought of the structure of diagnostic decision and hierarchy in modeling, the paper presents cubic hierarchy Petri Nets used as visualized modeling tools to support the nesting modeling, researching the cubic hierarchy Petri Nets framework structure of reconfiguring multi-agent diagnosis system and analyzing the resource scheduling Petri Nets model, cubic hierarchy Petri Nets model of reconfiguring multi-agent diagnosis system and Petri Nets model of executing reconfiguring function agent. Examples are used to illustrate the design method of Petri Nets model. Finally, the paper gives a computing algorithm for cubic hierarchy Petri Nets.

RoboCup Simulation Research

SHU Wen-jie, GENG Li-na, ZHENG Zhi-qiang

RoboCup simulation has been develop for a few years in the world. This paper gives some methods and thoughts about several main issues in RoboCup simulation research. And then we summarize our works on world model, opponent modeling and team strategy.

Simulation of Neural Network Affected by Humor Factor

FAN Shu-hai, XIAO Tian-yuan, LOU Pei-huang, ZHANG Lin-xuan

There exist three regulation methods in human organism, auto-regulation, nervous regulation and humoral regulation. This article integrates the humoral regulation to the nervous regulation and carries out the simulation of the neural network affected by humor factor. In the open loop mode, it is deduced a very useful learning formula of the threshold affected by humor system in BP neural network. Considering the back action of the neural network to the humor system, it is proposed in the paper a close loop mode system, which can eliminate the error of the neural network. In the anesthetic mode, the conditions of the loop mode is deduced and the stability of it is validated. And then the paper describes a method to extend the mixed network to a grey humor factor affecting network. Finally, the mixed system is applied to the quality control in the production process of Mass Customization.

Structural Optimum Design of Flight Motion Simulation Table’s Frame

XIE Tao, CHEN Zai-li, LIU Jun-kao

Mode updating and analysis utilizing finite element analyse software was carried out on a certain type of simulation table frame on the basis of optimization goal of guaranteeing the frame rigidity and reducing its inertia.The result of uniform of first-order natural frequency of every orientation was achieved. The inertia of the frame was reduced without reducing of rigidity, and this method has provided important reference of optimum structure design of simulation table frame.

Digital Platform for Satellite Orbit Design and Mission Analysis

CAO Xi-bin，ZHANG Jin-xiu，SUN Zhao-wei

In order to adapt to the trend of digitized and integrated design of satellite, it is integrated that Satellite Tools Kit (STK) with great demonstration and verification and satellite orbit design software faced to customer by STK/CON function. From the viewpoint of satellite customer, digital platform for satellite orbit design and mission analysis is built. It is provided with design, demonstration, verification and great data report and access, according to different missions of respective satellite customer. The platform is used to optimize and verify the project of satellite orbit design during the development stage.

Study of Digital Stabilization Technique and Simulation for Strapdown Antenna Platform

ZHOU Rui-qing, LV Shan-wei, LIU Xin-hua

The technique of feedforward compensation combined with feedback control was put forward and applied to stabilize Line-of-Sight (LOS) of strapdown antenna platform. The scheme for digital realization was presented by analysis. Simulation of platform with gyro nonlinear factor, measuring noise and sensitivity to acceleration was carried out for availability checkout. The results show that compensation can reduce error. The method is proven to be effective in reducing body disturbance within the scope of definite gyro noise and sensitivity to acceleration.

An Investigation of Bicycle Dynamics in Interactive Bicycle Simulator

HE Qi-chang, FAN Xiu-min, MA Deng-zhe, CHEN Cong

The interactive bicycle simulator is a motion simulator system which includes motion and force cueing, dynamics simulation, and computer graphics technologies. The dynamics model is the core of its simulation software. On the basis of the analysis of bicycle dynamics, this paper proposes two “slightly” coupled dynamics sub-modules: the stability model and the vibration model, which fully describe the dynamics of bicycle traveling over rough surfaces. This paper also solves the key input data of dynamics model under bicycle simulator environment.

An Algorithm for Energy-Efficient Train Operation Simulation With Fixed Running Time

DING Yong, MAO Bao-hua, LIU Hai-dong, WANG Tie-cheng, ZHANG Xin

This paper explores the simulation problem on train energy-efficient operation with fixed running time. A simulation system has been developed suitable for different running conditions and train parameters. As an emphasis, the paper discusses the optimized model and the heuristic algorithm for locomotive to work under the practical operating environment. The paper also analyzes the control strategies base on the target speed and describes the knowledge expression of train expert control. An application of the methods on the energy-efficient operation for long-haul freight trains in an uneven railroad has been presented. The average energy-efficient ratio is about 8.0％. With the aids of simulator, the algorithm can provide a fast simulation results and expediently human interference for the practice.

Implementation of Functional Simulation of Infrared Fuse in One Kind of Anti-Air Missile

LI Shi-lei, LI Hong-ru, LI Xu-yuan, FENG Zhen-sheng

The overall accuracy and the result are determined by the simulation module of infrared fuse in the simulation system of one anti-air missile’s dynamic flying process. Using the platform of Matlab/Simulink, the contradiction of the module’s required accuracy and the system’s running efficiency is solved effectively and the module has a good result in the practice.

Research of Intelligent Vehicle Lateral Control Algorithm Simulation Based on Fuzzy Logic and GA

RUAN Jiu-hong, FU Meng-yin, LI Yi-bin，DENG Zhi-hong

Controller design can be regarded as a process of structure and parameters being searched. An algorithm for controller design is proposed. Fuzzy logic (FL) is used as its control strategy. T-S fuzzy-neural network (FNN) is used as controller’s structure and Genetic Algorithm (GA) is used to search and optimize controller’s parameters. By simulation, intelligent vehicle’s lateral controller can be automatically designed. The simulation results show that the controller has better performances, and the algorithm can effectively resolve non-linearity and time-variant parameters problem of intelligent vehicle lateral motion.

Simulation and Research on the Clobber Probability of ALCM

XIE Bang-rong, YIN Jian, SONG Jin-song

This paper puts forward the necessity of research on the probability of ALCM, and also establishes the model of ALCM’s clobber probability based on both the Butterworth terrain model and the Dryden atmosphere model. It simulates much of the computation of its clobber probability under typical cruise conditions and analyzes those simulation results deeply, and also comes to some important conclusions. The results prove the model’s correctness and validity. This research can provide theory-bases on finalizing the design and making use of the combating–ALCM.

Study on the Simulation for Train Operation Adjustment under Moving Block

ZHANG Li-yan, LI Ping, JIA Li-min，YANG Feng-yan

In this paper, according to the actuality of inconsistency between train transportation capacity and freight quantities in our country, a method by increasing train density under moving block system is put forward. Firstly, on the base of brief analysis of the difference between moving block system and fixed block system, train operation adjustment model under moving block system is built up. Secondly, expert system is adopted to build train operation adjustment simulation system under moving block system. Finally the simulation outcome is analyzed. The building of the simulation system will provide common platform for train operation simulation under moving block.

Simulation of Recon-sat Reconing Process and Evaluation of Reconing Effect

GUAN Ai-jie, YU Da-tai, WANG Yun-ji, AN Yue-sheng, LAN Rong-qin