Volume17  Number 12  (2005)

Title Author   Abstract
Research on Modeling of Battlefield Roles Based on Multi-Agent YIN Quan-jun, ZHANG Qi, GUO Gang, HUANG Ke-di  The complexity of war game simulation model comes from the complexity of battlefield roles’ behavior and battlefield environment, and the system based on multi-agent is an effective approach to solve complex problem. The characteristics and construction of war game simulation model were analyzed. Through integrating behavior modeling and synthetic natural environment (SNE) modeling, the approach of battlefield role modeling based on multi-agent was researched. The required components of battlefield role agent were described. A kind of general agent architecture was designed to simulate battlefield roles. The theory and application issues on planning, communication and teamwork were studied.
Research of Hardware-in-loop Simulator on ABS Self-optimizing Controller WANG Ji-sen, FU Wei-qiang, YU Yang, YUE Xiao-jie2 A Self-optimizing Controller applied in anti-lock braking system (ABS) was introduced based on TI’s 2407A DSP processor. A single-wheel and a double-wheel model were built. Under different road conditions, the feasibility and availability of the controller are verified in ABS applications by hardware-in-loop simulation.
Mathematical Modeling of Marine Waterjet Propulsion System and Simulation Research on Transient Process KONG Qing-fu, CHEN Guo-jun, ZENG Fang-ming  The working safety of waterjet pump under transient process plays a very important part in the whole study on marine waterjet propulsion system, however, the working safety of waterjet pump is mainly decided by the factor that whether the development of the system control parameters is correct or not. The mathematical and simulative models of marine waterjet propulsion system suitable for system simulation under transient process were presented firstly; and then, from the aspect of preventing the operating curves of the waterjet pump from passing through the limited operating area under transient process, two kinds of transient processes including accelerating course and turning course were taken as main studying objects to be simulated, and the results derived form simulation are used to give a correct instruction of the development of the corresponding control parameters. 

Short-term Forecasting Model of Regional Economy Based on SVR

 XIAO Jian-hua, LIN Jian, LIU Jin Based on the analysis of the regional economic development, the forecasting of regional economy has highly non-linear and obvious fluctuant characteristic. As a result, the general forecasting methods for macro- economics become inefficient. Kernel method can obtain the non-linear mapping from data space into feature space. SVR based on kernel method, has excellent ability of solving non-linear problem. The correlation analysis of the factors which effect the development of regional economy were conducted first. Then the short term forecasting model of regional economy based on SVR was built. The validity of the model is demostrated by applying it to a city as a real example.

Efficient Simulation Method of Underwater Target Echo Based on Complex Envelopes

WANG Xin-xiao, HUANG Jian-guo, ZHANG Qun-fei, YAN Wei Target echo signals are the main information source in underwater acoustic detection system. The reality and quantity of simulation for the echoes is the pivotal factor which restricts the real-time of the simulation system. It is very important to form a model which can meet the requirements of real-time and reality performance. An efficient simulation method of underwater target echo based on complex envelopes is presented. The method based on the complex envelopes of narrowband signals, which includes the influence of Doppler shift and frequency compensation in real system. New method can satisfy the requirements of real-time and reality in simulation system. It has been applied in an developed underwater acoustic countermeasure simulation system and the results show the correctness and validity for the new method.
Using Shooting Point Stepping Pace for Evaluating

One-versus-one BVR Combat Effectiveness

 ZHAO Zhi-zhong, GAO Zheng-hong, LIU Xing-wei, ZHAO Fu-cheng  A new criterion of evaluating one-versus-one BVR combat effectivness is presented. In BVR combat simulation, the exchange ratio is usually the main criterion which reflects fighter's combat effectiveness. According to the one-versus-one BVR combat philosophy, airspace control can be achieved by killing the adversary directly, on the other hand, it can also be established by driving away the adversary through missiles shooting. The new criterion －Shooting Point (the position where fighter shoot missile) and Stepping Pace can directly reflect fighter's ability of occupying the airspace step by step. Using this criterion and exchange ratio in BVR combat effectiveness evaluation can reflect the nature of BVR combat much exactly. This criterion is proved to be feasible by an example and the concept of this criterion can also be expanded when evaluating many-versus-many BVR combat effectiveness.
Study on Modern Avion Simulation Fidelity HUANG An-xiang, PAN Zhi, CHEN Zong-ji, LI Jin-song The requirements of those main training subjects to simulation systems were analyzed. Based on these discussions, two methods to evaluate the modern avion simulation fidelity were put forward quantificationally and qualitatively. Hereafter the fidelities of visual system and moving system of avion simulation system were calculated and the optimization visual system and moving plate-form combination scheme with fidelities were analyzed and a summarization of the ways was made to choose visual and moving systems at last.
Dynamical Simulation Analysis on High Pressure Water Injection Pump LENG Ru-bo, YU Sui-ran, WANG Cheng-tao, LIANG Zheng, ZHONG Gong-xiang The development of petroleum mechanical equipment in China was reviewed and the importance to apply modern design methodology to petroleum equipment in China was suggested. Dynamical simulation and its related technique were also given. 3H-8/450 pump was studied. The simulation model was set up. Dynamics and kinematics simulation analysis were processed, and drive torque for this system was also calculated. Results in theory were used to check the model and motion analysis results. After reviewing the motion analysis results, some advices for the improvement of the pump were given. Simulation analysis is processed on the pump which is improved, and results show that reaction forces are decreased
Study on Fast finite Element Simulation Model of Thermal Analysis of Vehicle Brake LI Liang, SONG Jian, LI Yong, GUO Zhen-yu Based on study of the energy dissipation during the vehicle braking and the method of the phase transfer in the time region, the fast finite element simulation model for the braking cycle was established. The two dimensional FEA model was used to simulate the full symmetrical cycle brake-disk and brake-drum, and the three dimensional model was used for the hollow brake-disk with the thermal dissipation of the rib in the disk. The transient character of the energy dissipation coefficient, the thermal exchange coefficient, and radiation coefficient were considered, and then the simulation results of the transient temperature field distribution of disk were obtained. The simulation results are validated by the experiment test. So the validity and practicability of fast finite element simulation model are verified, and the model can be used in the anti-heat fade design and thermal fatigue design of the vehicle brake system.
A posteriori Probability Analysis for Matched Field Inversion ZOU Shi-xin, MA Yuan-liang, YANG Kun-de, LEI Bo  A posteriori probability analysis method was proposed based on a parallel optimization algorithm, and applied to quantitative analysis of matched inversion results. The frequently appeared the uncertain of   convergence criterion was resolved. The problems of harmony between sample number and calculation time, as well as between sample number and sample quality in higher order statistics calculation were achieved. Examples based on synthetic data show that posteriori probability analysis for matched field inversion can be conducted effectively by the proposed parallel optimization algorithm.
Fuzzy Neural Network Based on Hybrid Learning Algorithm and Its Application to Soft Sensor LIU Rui-lan, SU Hong-ye, CHU Jian A new hybrid learning algorithm was proposed to train the fuzzy neural network based on TSK fuzzy model. Firstly, fuzzy c-means algorithm was applied to initialize the parameters of the fuzzy neural network. Secondly, the parameters of the premise part of the fuzzy rule were learned by the gradient descent algorithm. Finally, the parameters of consequent part were learned by the partial least squares algorithm. The proposed hybrid method could automatically give appropriate initial parameters of the fuzzy neural network and prevent the fuzzy rule number from increasing for high-dimensional systems. The results of simulation and industrial application show that the hybrid learning algorithm has properties of fast convergence and high accuracy. The proposed method has been applied to build a soft-sensor for measuring the 4-CBA concentration in the industrial PTA（Purified Terephthalic Acid）oxidation process and the result demonstrates that the proposed method is suitable to practical application.
Modelbase of Tube-and-shell Heat Exchangers and Its Application to Simulation of Heat Exchanger Networks XIE Zeng-zhong, ZHANG Jun-feng, LUO Xiong-lin, CHEN Yu-kun, JI De-wei By means of the method of piecewise centralizing the distributed system parameters, a dynamic mechanical model of the tube-and-shell heat exchangers was proposed. Based on this model, two basic simulating modules were established as components of all kinds of simulating modules of multipass tube-and-shell heat exchangers. These simulating modules formed a modelbase, which could be used to establish a simulation system of any given heat exchanger networks according to their frames. A simulation system of a practical crude oil heat exchanger networks was established with the aid of the modelbase. The simulation results show that this simulation system not only works perfectly but also can be used conveniently to study the influence of the flow or/and temperature disturbances of the involved streams. Moreover, the modelbase built by this means can be expediently used to simulate other complex heat exchanger networks.
Manifold Object Petri Data Model of Product for Creative Design WEN Gui-hua , JIANG Li-jun  Creative design includes a large number of design intents, design elements, materials, activities, in addition to a diversity of data types and complex relationships. The need to adopt appropriate product data model schemes and database technologies that can handle these complex cases continue to hinder the implementation of creative design for product. A new product data model called MOPN（Manifold Object Petri Net）is proposed to support for creative design with the ability of depicting the static structure and the dynamic working process of the product. The model is integrated with object-oriented paradigm to implement encapsulation、abstract and hierarchical modeling of the product, particularly where the attribute value of the product can be extended to manifold, and the high level petri net can be applied to describe the dynamic working process of the product. A prototype of a simulation tool with graphical interface has been implemented for this model.
Research on General Physical Model for Simulation of Infrared Image of Sea Object SHEN Guo-tu, YANG Bao-cheng, CAI Ji-guang, WANG Zhi-hua, GAO Jing, WANG Zhang-ye Based on the general three dimensional description method of geometrical model of objects and the corresponding generating principle in light of semi-uniformed element division method, the physical model for the simulation of sea object infrared images which was developed earlier was improved and a more generic model developed with software to use the model was established. Calculation results prove that the new model is more universal than the previous ones and the latter can be taken as special cases of the former. The new model can improve the precision of some result and it can be used to simulate infrared radiation fields of object in other environment after a little modification.
Algorithm of segmentation of medical series image 3D reconstructs YANG Jin-zhu, ZHAO Shu-ying, HU Ying, LIU Ji-hong, XU Xin-he

An algorithm of serial images segmentation was proposed based on the combination of Live Wire algorithm and contour interpolation algorithm. Using the ideas of active contour model, this algorithm combined with the ternary algorithm, modified traditional contour interpolation and Live Wire algorithm. Combining with the ideas of active contour model，the images are self-shrinking on the basis of actual images local character in contour of rebuild. The experiment shows the algorithm can obtain the boundary of the desired object from a series of medical images quickly and reliably.

Direct Data Domain Approach to Space-Time Adaptive Processing

WEN Xiao-qin，HAN Chong-zhao In non-homogeneous environment, traditional space-time adaptive processing doesn’t effectively suppress interference and detect target, because the secondary data don’t exactly reflect the statistical characteristic of the range cell under test. A novel methodology utilizing the direct data domain approach to Space-time Adaptive Processing (STAP) in airborne radar non-homogeneous environments is presented. The deterministic least squares adaptive signal processing technique operates on a “snapshot-by-snapshot” basis to determine the adaptive weights for nulling interferences. Furthermore, this approach eliminates the requirement for estimating the covariance through the data of neighboring range cell, which eliminates calculating the inverse of covariance, and can be implemented to operate in real-time. Simulation results illustrate the efficiency of interference suppression in non-homogeneous environment.
Dynamic Linear Regression Modeling and Real-time Prediction Based on Bayesian Network and Neural Network HUANG Guang-qiu, JIA Ying-feng, ZHOU Jing A new method was represented to model dynamic linear regression system driven by data, in which a bayesian network was combined with the RBF neural network. Based on this model, the knowledge distribution of nature connection tied in bayesian method was used to formalize all kinds of information and implement the durative process of learning. An improved RBF neural network with the exponential-longevity linked weights was used to optimize importing data and enhance calculating velocity. An improved genetic algorithm was applied to realize the dynamic adaptation of the neural network. Based on all the algorithms, a dynamic linear regression modeling and real-time predictive control system was implemented. A simulation experiment demonstrates efficiency of the method.

Orthogonal Particle Swarm Optimization

XUE Ming-zhi, ZUO Xiu-hui, ZHONG Wei-cai, LIU Jing A new algorithm based on the optimality of orthogonal experimental design method and the abilities of memory in particles was proposed, which is called Orthogonal Particle Swarm Optimization (OPSO). Its characteristic is that initial particles of particle swarm are generated by orthogonal experimental design, so that these particles can be scattered uniformly over the feasible solution space and the particle swarm of the next generation is generated by means of memory. So the search space could be explored and exploited efficaciously. The OPSO was tested on four benchmark functions. The experimental results illustrate that the OPSO has the potential to achieve faster convergence and to find a better solution and has strong parallel characters and flexible features. In the end, the performance of the new algorithm was discussed caused by different settings of initial velocity and disturbance.
Modeling and Analysis for Self-healing Based Software System WANG Ji-wen, YOU Jing, XU Man-wu, LIU Feng-yu Complex software systems require themselves to self-manage at runtime in order to improve systems’ availability. Although there exist research papers for modeling self-healing based systems, little has been focused on the formalized analysis of this kind of systems.  Software architecture modeling was argued based on self-healing systems. After giving architectural style requirements, style characteristics, the self-healing mechanisms of the software architecture framework was designed according to the analysis of the requirements and the characteristics given before. Based on this model, a case study (command and control system) was analyzed by applying a formal systematic software architecture specification and analysis methodology (SAM). Conclusion shows this new model can satisfy the system’s time constraint requirements and improve the system’s availability.

Novel Modeling and Realization of Sports Simulation System with Multifunction

LIU Zi-hong, GAO Zhi, JIAN Ji-qi A novel model of sports simulation system with multifunction was proposed, of which the software, hardware and network platform implementations were discussed in detail. The system is primarily composed of video projector, virtual playground, wireless image sensor, central processing machine and sports equipment. With developed characteristics of “Many to One” and “One to Many”, the system could transform a variety of simulators for different sports exercise and provide different exercise modes for each simulator, resolving the problem of multi-sports compatibility for traditional systems. Moreover, several practical applications are also presented.

Physical Simulation of Flight Environment for High-Altitude High-Speed Vehicle

LIU Yong-ji, DONG Su-jun, WANG Pei-guang, NING Xian-wen, WANG Jun Vehicle is characterized by less flight time-consumption, high speed, quick change in altitude and rigorous flight environment. According to the present technologies being used in aeronautics and astronautics field, transitional heat balance physical simulation test technology, a new technology which couldbe applied to ground simulation test for high-altitude high- speed vehicle was put forward. The core part of transitional heat balance simulation test is dynamic simulation and physical simulation of the coat surface temperature in aerodynamic heating environment. Thoughts that coat surface temperature are regarded as control parameter of test was proposed. And key technologies, including computer simulation, simulated methods and temperature control strategy based on fuzzy control were introduced. Especially, dynamic simulation based on engineering prediction method by simulated example was analyzed.
Simulation Test System Design of Large-Scale High/Low Temperature Environmental Simulation System Based on MATLAB

DONG Su-jun, XIONG Wei, FENG Zheng-gang, WANG Jun

Based on MATLAB, the simulation model of a large-scale High/Low Temperature Environmental Simulation Systems was set up on the principle of modularization. A mimic interface was developed in MATLAB figure development environment. And dynamic data exchange among the simulation model, the interface figure and the monitor program on FIX software were accomplished by using the ActiveX control technology, which greatly strengthen the simulation test system on experiment scheme validation, process and control system optimization and staff training.
Design of Platform of Circuit Functional Reliability Simulation

ZHAO Guang-yan, SUN Yu-feng, YANG Li-bo

 Against the hot issue of engineering application of functional reliability simulation, after analyzing the function and characteristic of Circuit Functional Reliability Simulation Platform, the design method of CFRSP was proposed, and main function and framework of CFRSS was described, and the two key techniques (the integration of EDA simulator and the interface of EDA tools) and its resolve methods were discussed, and then a case experiment was carried out to validate this platform. The development of CFRSP realizes the synchronous analysis of performance and reliability on circuit, and will be significant for engineering practicability.

Research and Implementation on Intelligent Driving Behavior Model of Virtual Autonomous Vehicle

　

 LOU Yan, HE Han-wu, LU Gui-ping, ZHENG De-tao, CHEN Xin By analyzing the characters of intelligent driving behavior, a more satisfying intelligent driving behavior model of virtual autonomous vehicle was developed. It is divided into five units which are Perception Unit, Emotion Unit, Collision-Avoidance Unit, Decision Unit and Implementation Unit. Each unit describes the certain driving behavior and has its own set of fuzzy variables and fuzzy rules. Moreover the 3D model and behavior model are divided which makes the virtual autonomous vehicle model more usable. An Aggressive Driving Model was developed by EON Reality software. The result shows that the intelligent driving behavior model of autonomous vehicle provides more colorful and perfect virtual traffic environment in driving simulation, and it can also provide the nobody-driving vehicle with intelligent behavior model, and especially the pre-emergency model to the safety driving for the Collision-Avoidance Unit is added into the model.
3D Incomplete Data Repairing Algorithm Based on Neural Network XIONG Bang-shu, HE Ming-yi Due to surface reflection property, occlusion and accessibility limitation, certain areas of the object were usually not sampled, leading to holes and undesirable artifacts in the resulting models. To improve the quality of modeling, a new repairing algorithm for 3D incomplete data was proposed. First, the sample points were acquired around the incomplete data boundary by using a rectangle frame, and a local coordinates system based on the least square-fitting plane of the samples was established. Then, in this coordinates system, the new points were resampled over the incomplete region by the trained multi-layer perceptrons (MLP) network. Finally, the resampled points were used to displace the sample points in cloud data after these points were transformed from the local coordinates system to the original coordinates system. Experimental results show that the algorithm has higher repairing efficiency and precision.
Route Optimization and Dispatching for Transportation Net of Material Distributing System Based on Intelligent Ant Algorithm CHANG Fa-liang, WANG Peng, QIAO Yi-zheng To solve the bottlenecks effect of a material distributing system, a model of multi-vehicles and multi-routes transportation net and its describing were proposed. According to the characteristics of the distributing system, an intelligent ant algorithm was used to optimize the route of the transportation net, and the optimization algorithm and computation steps were given. Finally, experiments were given to verify the algorithm. The experiment results illustrate that the method can be used to solve the route optimization and dispatching problem of the transportation system, and improve the efficiency of material input and output from the warehouse.
Intelligent Control of Time-delayed System ZHENG En-rang, WANG Xin-min The auto-adapted fuzzy PID method was introduced based on the Smith construction of time delay system, and the method is utilization relationships eec with the PID three parameters. According to the fuzzy control principle to 3 parameters to carry on line revision, the system has satisfactory performance. The results of computer simulation and experimentation show that the method is efficacious.
Analysis and Design of Network Communication Components for DIS

MO Shi-feng, LI Qin, WANG Dan-xia, YOU Zhi-sheng

Simulation data was partitioned into the control and status information, so the simulation data transmission by using RTP/RTCP was proposed to improve the reliability and real timeliness; and data queue, assembly and recognition of the length-variant packet, detection of network exception were analyzed in detail to improve the performance. By using object-oriented framework and multi-thread technology, network communication components were designed and implemented for simulation client side and server side respectively. Through the usage in an ATC simulation platform, these network communication components are proved to be effective for DIS application, and also bear the features of reusability, extensibility and ease of use.

Design and Implement on SimGrid-HLA about Simulation Grid Prototype

LING Yun-xiang, LIAO Hu-xiong, SHI Xiang-ning, QIU Di-shan, GAO Ming

 On the basis of functions demand analyzing of warfare performance simulation and evaluation system, stakeholders in warfare simulation include scenario developers, running & managing personnel and model managers. Aspecial simulation grid architecture based on HLA was proposed which could be divided into three levels: application level, HLA/ RTI level and model level. The analysis and design of SimGrid-HLA prototype system were introdued including Model register, Index Manager, and Scenarios Manager. The SimGrid-HLA prototype accomplished the model registering, location, management and scenarios execution. Obviously the prototype couldmake contribution to construct the large-scale military simulation applications.
3D Modeling and Visualization Simulation of Near-earth Space Environment Elements WANG Peng，XU Qing，LI Jian-sheng The static model and survey model about the near-earth space environment element were advanced. On the base of each near-earth space environment element specialty, the relevant 3D data field was established by every static model and the survey data, and then the data field was partitioned off to hexahedron, thereof the survey spatial data was switched into the regular hexahedron data by Jacobi matrix. Finally the geometry model of the neutral atmosphere, the ionospheric plasma and geographic magnetic field and the earth radiation belt were given, and the universal 3D visualization scheme for the near-earth space environment element simulation was advance.
Design and Realization on 3D Visualization Simulation of Attack and Defense Based on HLA

LI Yu-xiang, GONG Guang-hong

 The establishment of 3-Dimension Node about Attack and Defense was discussed in order to develop 3D-program based on the standard protocols High-Level Architecture (HLA). Two level infrastructures of network including the external network based on HLA and the internal network based TCP/IP for the interaction of 3D-data were argued. On the premise of data’s precision, the communication flux of network was reduced and the real-time 3D-data was smoothly processed. In addition, many special effects rendered were located in the scenes and intelligent eyes were designed to act as the observer for the scenes. The system has achieved a very good demonstration effect through the technique of multi-thread, multi-scene, multi-channel, multi-viewpoint.
Two-Pass Mosaic Algorithm of Panoramic Image Using Maximum Grads and Intensity Correlation

XUE Feng, ZHANG You-sheng, JIANG Ju-lang, OU Chun-sheng

  A two-pass mosaic algorithm of panoramic image using maximum grads and intensity correlation was proposed. The algorithm synthesized methods of intensity matching and feature matching image mosaic methods. First, by matching maximum grads of two images, a search range for successive intensity correlation matching process could be remarkably shrunken which made the whole matching process more speedy. Then intensity correlation matching algorithm was used to search the optimal matching position of two images. These two processes ensure the algorithm simple, fast, robust, and false matching can be avoid. Some experiments demonstrate the simplicity, speediness, and efficiency of the algorithm.
Scene Simulation of Dynamic Responses of Offshore Stucuture in Ice Environment LIU Jian, CHEN Guo-ming, YIN Zhi-ming For the purpose of displaying the interaction process of ice-platform, the dynamic simulation system of platform in ice environment was developed. In this system, the visualization model of platform was built based on MultiGen and Vega, and the dynamic responses were calculated by ANSYS. The parameterized modeling method was used, and the parameters of platform and ice can be modified conveniently. The key technique of dynamic simulation of the platform and some details of the realtime simulation were introduced, and the effect of simulation was optimized. By use of the ANSYS, MultiGen and Vega, the good effect of dynamic simulation of platform under ice loads was obtained. The ice-induced vibration of platform can be known visual by this system. This system is helpful for the design, use and vibration control of platform.
Design and Simulation of Fuzzy Sliding Mode Controller for Servo Systems PANG Hai-ping, JIANG Shu-yan Integrating fuzzy logic control and sliding mode control, a new design method of fuzzy sliding mode controller is introduced. Then a system structure based on fuzzy sliding mode control is proposed for servo systems with large parameter variations and external disturbances. Finally, this method is applied to control one arm of a robot, and the simulations are given respectively when the object parameters changed in a large range and the system are affected by sinusoidal disturbances. Simulation results show that the fuzzy sliding mode control can reduce chatting aroused by conventional sliding mode control and at the same time it has high performance of robustness under certain conditions.
Simulation on H∞ Robust Control for Regenerative Braking of Electric Vehicle BAI Zhi-feng, CAO Bing-gang, LI Shu-xin, KANG Long-yun A novel scheme of regenerative braking of electric vehicle named as Charging Current Control was proposed based on the analysis of deficiency of schemes commonly used to avoid the damage on battery caused by large charging current. The design of H∞ controller for regenerative braking was given to guarantee the robustness of the closed-loop system under the presence of uncertainties, such as large variation of back electromotive force of propulsion motor, voltage of battery, state of road, and initial speed of vehicle. Moreover, the model of regenerative braking was built with SIMULINK, and the simulation results show that the controller based on H∞ theory has better performance of stability, robustness, and disturbance attenuation than traditional PI controller.
Graphic Realization of Phase Plane for Higher Order Nonlinear Control Systems ZHANG De-xiang, FANG Bin, GAO Qing-wei, CHEN Jun-ning Nonlinear control systems exist everywhere in the real word and they have many analysis methods. Phase plane analysis method is widely used in the nonlinear control systems because it can provide information of steady-state performance and time response, however, this method is restricted our attentions only to the first- and second-order linear systems. In order to obtain the phase plane of higher order nonlinear control system, a new graphic method of phase locus of phase plane for higher order nonlinear control systems in terms of state space method was proposed. The numerical simulation results show that the algorithm has superior static and dynamic performance、higher control accuracy and better robustness compared with analytical method. The numerical result shows the feasibility and efficiency of the method, and additionally, the algorithm is very easy to be implemented with low computational complexity.
Key Techniques of Passive Tracking of Multiple Maneuvering Targets by Single Observer Based on Information Fusion WANG Jie-gui, JIN Xue-ming, LUO Jing-qing Tracking initiation and data association are key techniques of multi-target passive tracking by single observer. A new adaptive passive tracking initiation algorithm based on information fusion was proposed. First, according to multiple features of the target, multidimensional dynamically variable tracking gate was built for adaptive detection. Further, the Sequential Probability Ratio Test (SPRT) rule was used to confirm the track. And also a new data association algorithm based on information fusion was proposed. Based on the information fusion of multiple features of a single valid observation, the decision of synthetic data association of all the targets was made. With the help of computer simulations, the tracking initiation algorithm is proven to be correct and effective, and the data association algorithm is proven to be superior to the NN method.
Approach of Chaotic Control Based on T-S Fuzzy Model QIAN Jun-lei, MA Xiao-feng, YANG Zhi-gang The limitation in tradition ways such as the complete and accurate knowledge of parameters in feedback linearation can be overcome by using fuzzy control technique in chaotic control .The T-S fuzzy system can approximate nonlinear system very well, and its IF-THEN rule is constructed by linear state space subsystems, and the fuzzy controller can be abtained by using fuzzy system control theory, and nonlinear system can be controlled by this nonlinear controller. The so-called T-S fuzzy model, including rules given in local linear equations, can approximate chaotic system very well by means of adjusting fuzzy parameters. Based on this kind of model, a novel fuzzy controller design method was proposed via parallel distributed compensation technique. The all controller parameters were obtained simultaneously by solving a set of linear matrix inequalities. The illustrative examples demonstrate the effectiveness of the presented approach.
Adaptive Synchronization of Lü System with Fully Unknown Parameters via Single Controller HUANG Wei, ZHANG Hua-guang , WANG Zhi-liang An adaptive control method for the synchronization of Lü system with fully unknown parameters is presented by employing only a single controller. The single controller and adaptive laws of parameters were designed based on Lyapunov stability theory. The obtained results here improved and extended the works of Elabbasy et al. with three controllers [8] and Han et al. with two controllers [9]. Numerical simulations are provided to show the effectiveness and feasibility of the developed method.
Decoupled Predictive Functional Control Algorithm Based on Nash Optimization for MIMO Processes

ZHANG Bin, WANG Xiao-yan, ZHANG Wei-dong

 A decoupled predictive functional control algorithm based on Nash optimization for MIMO process was proposed. The decentralized optimization method and Nash optimization were adopted to deal with coupled variables. Utilizing the characteristics of base functions of the predictive functional control algorithm, the online calculation was reduced significantly. The simulation shows that the proposed algorithm is efficient and effective.
Fuzzy Multiple Reference Model Adaptive Control and Simulation Study ZHU Rong-jia, JI Zhi-cheng  A new fuzzy multiple reference model adaptive control method combining the fuzzy select and conventional adaptive control was proposed. To overcome the control difficulties which were due to significant and unpredictable system parameter variations, this method used the fuzzy logic rules to choose the suitable reference model. The new method was applied to control the speed servo system of dynamic model of BLDCM, and the simulation results show it works well with high dynamic performance and control precision under the condition of great change in reference speed and load torque.

Robust Multivariable PID Arguments Tuning for Ball Mill System

 QI Shou-rong, WANG Dong-feng, HAN Pu1, GAO Ming Based on Internal Model Control(IMC) principle, a new kind of PID arguments tuning method for multivariable system was proposed. The coefficients of proportional term, integral term and derivative term were directly obtained from the present method. Computer simulations in ball mill process of pulverizing system was done, and the results show that PID controller tuned by the new method is very superior to the general tuning method in the following aspects: control quality, robustness and disturbance rejection capability while controlled plant varies.
Research of AGV Tracking Strategy Based on Fuzzy Immune PI and Cross-coupling Control XIAO Ben-xian, ZHAO Ming-yang, QI Dong-liu, LIU Hai-xia, WANG Qun-jing  In allusion to multi driving wheels, fuzzy immune PI and cross-coupling control method are proposed to realize expectant tracking path, which may resolve an unforeseeable problem caused by parameter changes or disturbance of any one driving system. Because cross-coupling control is advantageous to restricting and harmonizing between multi driving wheels, it can reduce orientation error and improve the accuracy of path tracking effectively. Fuzzy immune control based on the theory of immune feedback, can make the system having definite adaptive capability and robustness, and its performance will be superior to conventional PI control. Simulation results demonstrate that the method is feasible and valid.
Study on Simulation Model of Air Defense ATBM Command and Control in Information Age Warfare Based on OOA

ZHANG Ming-zhi, HU Xiao-feng, SI Guang-ya, YANG Jing-yu, LUO Pi

 Based on object-oriented analysis (OOA) and design (OOD) on the conception model and the software implementation model of air defense anti-tactical ballistic missile (ATBM) command & control (C2) in information age warfare (IAW), the object model of air defense ATBM command & control in information age warfare and the object class conception of air defense ATBM command & control in information age warfare were discussed. The object structure of air defense ATBM command & control in information age warfare was proposed. The object attribute, operation, interaction were discussed. The object model and the object classify structure of command & control simulation of air defense ATBM in information age warfare were given.
Modeling Complex Discrete Event Dynamic System Using ExSpect QU Chang-zheng, YU Yong-li, JIN Wei, GAO Lu By the development of the theory and application, Petri Net has been a strong tool of discrete event dynamic system modeling and analysis. It is impossible to do it without the scientific modeling method and computer software. The Executable Specification Tool: ExSpect were introduced and a method of using ExSpect to model complex discrete event dynamic system was provided. At last, an example wasprovided.
Integrated Modeling and Simulation Methodology for Complex Multi-satellite Systems Based on MAO HE Yong-jun, DAI Jin-hai Aiming at analyzing and optimizing the effectiveness of the complex multi-satellite Earth observation systems operating in intelligent，collaborative and autonomous mode, the basic ideas of modeling were put forward  and the integrated multidisciplinary hybrid heterogeneous hierarchical models in the description level of decomposing structure were constructed and integrated, which should be homo-structure as the corresponding systems. The supporting mechanisms and limits of the Object-Oriented methodology, and the excellent characteristics of the Multi-Agent Based methodology were analyzed. The MAO(Multi-Agent/Object)- based modeling，simulation and optimization methods for complex multi-satellite systems were proposed..
Overview of Complex Non-Entity Product Design Methodology and Simulation New Aspects OU Song Based on the complex product design research achievements and methodologies, the complex product definition of the finances was extensively probed，the Complex Non-entity Product (CNP) concept was given, and the product qualities were equally defined by the product risk. Comparing with the complex entity product, the CNP’ design methodology, resolution, simulation and some likely new respects and approaches were discussed.
Application of DIS and DVR to Simulation of Battleplane Aerial Warfare DONG Xiao-long, TONG Zhong-xiang, WANG Xue-de To meet the new tendency of large-scale distributed simulation training of air battle, the development of air campaign simulation software as background was taken, with having analyzed the new characteristic of the simulation training and having researched several crucial technologies such as real time network communication and scalability in the simulation of fighter plane of air battle with distributed virtual reality. The success of this system can serve as good reference for development of high-quality air campaign simulation software and drill.
Synchronization and Parameter Identification of Hyperchaotic System MA Jun, WANG Chun-ni, WEI Zhi-qiang, PU Zhong-sheng Two methods were given to identify the unknown parameters of the 4-dimension hyperchaotic system. For the first scheme, it led the system to reach arbitrary desired stable point by using negative feedback control, and the equation for unknown parameters was found by solving the equation of the stable point. Another method was given to find the unknown parameters by selecting right initial value and constructing observer basedon the stability theory. The controllers are found to be powerful. Based on the theory of linear error, the eigenvalues of the Jacobin matrix were got. Complete synchronization and phase synchronization were realized by setting the eigenvalues of the Jacobin matrix as right value (corresponding to negative and zero, respectively). Zero eigenvalues of the Jacobin matrix corresponding to phase was investigated in detail. The most interesting point is that all the controllers are got analytically.  The numerical simulation results are consistent with the theory analysis.
Research on Simulation Model and Control Method of Ballast Water System

XIAO Min, YAO Shou-guang, LU Shi-kui, ZHANG Xin

On the base of an oil tanker, the mathematic model of the whole ballast water system was built up. The general used simulation software MINIS and factory control software Intouch were used to develop the dynamic simulation program for the ballast water system. The program run on PC. The simulation and monitoring of the ballast water system during ship putting in, leaving port, loading or unloading cargo oil could be realized by the simulation program.
Modeling of Airplane ECS and Parameter Optimization for Heat Exchanger YAO Hong-wei, WANG Jun Mathematical models for the main components of the airplane air-cycle system and MATLAB simulation modules were constructed. The air-cycle system was built including these component models and the performance of this system was researched. The predicting result agreed with the experimental one. This system was researched as the object, and decreasing exit temperature of the system as the object function. Then heat exchanger parameters-the flow number and flow length in the hot side were optimized as viewed from a system. The result showed that there were partly optimized resolve about these two parameters, depending on the input. And optimized relationship of heat, pressure and energy among the compressor, turbine and heat exchanger existed. The conclusion is significant as the reference to the ascertainment and optimization of the system parameters.

Simulation of GPS Receiver Used in Fuze Based on SystemView

ZHANG Jian, LI Shi-yi, LI Hui-jie

 The theory of GPS receiver used in fuze was described. The simulation of the receiver was accomplished with SystemView and the whole simulation result was presented. After the model was found, the parameter of the design was adjusted based on the various application background.
Simulation of Multi-Function Displays in Virtual Cockpit LE Jian-wei, XIANG Fu-sheng, DAI Shu-ling The simulation of Multi-Function Displays in a virtual cockpit must meet some special requirements. Firstly, the detailed requirements of the simulation of MFD in a virtual cockpit were analyzed. Secondly, a complete resolution of simulating modern CRT or LCD MFDs in a HMD-based virtual cockpit was given using OpenGL and VTree SDK. Finally, the method of controlling the MFDs was introduced with a HOTAS system and data glove in a virtual cockpit.
Designing and Realizing Automatically Diagnostic Expert System for Simulation Test WU Xiao1,2,3, ZHAO Guang-heng2, YU Ying-jie2, XI Long2 Utilizing the principle of expert system to analyze and research the simulation test system for some spacecraft, an automatically diagnostic expert system for simulation test wasdesigned and realized. Instructs and inject files of the test system couldbe automatically analyzed. Analog and digital data couldbe real-time checked automatically, including ultra-limit warning for analog data and exactness checking for digital data. Several kinds of general diagnosis rules for analog and digital data and method of real-time dynamically reasoning were proposed. Proved by system testing and practical application, diagnosis accuracy and real-time character of the automatically diagnostic expert system are high.

Dynamic Model for Simulation of EV with 4 Independently-driving Wheels

JIN Li-qiang, WANG Qing-nian, YUE Wei-qiang, SONG Chuan-xue The research on the EV using 4 Independently-driving wheel is popular now. The dynamic model with 18 freedom for simulation of EV with 4IDW was made and the motion equation of the vehicle was proposed. Comparing the test result and simulation result and simulation result in same maneuver, it is proved that the presented model gets vehicle dynamic performance by simulation in high precision. It is the foundation for the research on the control method of EV with 4IWD by simulation.
Simulating Analysis of Shredding Process of Steel Scrap LIU Jian-xiong, ZHANG Zong-hua, FAN Yu-jin, LI Zhe-kun The shredding process of steel scrap was simulated through FEM software ANSYS/LS-DYNA based on Non- linear finite element method. The simulating results that steel scrap is shredded are acquired. The model and method introduced are of importance.
Study on Traffic Signal Control Simulation on Main Road ZHU Wen-xing, JIA Lei Study on traditional traffic signal control almost emphasized on the isolated intersection or two intersections as one basic unit in which the signal was controlled by some algorithms. The concept of “big unit” was developed which consists of three intersections and their phase partition was also proposed. The optimal model was built in order to minimize the vehicles average delay through using the relativity between adjacent intersections in the “big unit”. Then the objective function and its constraints were obtained and it was optimized by GA so that the splits of all phases in “big unit” were got. The states of the traffic flows between every two intersections were pre-estimated through using the high order general neural networks. The offsets between every two intersections and the time length of the second phase were figured out also. Through computer simulation, the signals in “big unit” were controlled effectively as well as the traffic flows in main road direction were improved obviously, while the traffic flows in the secondary road were not changed at all.
Adaptive Bit-interleaved Coded Modulation in MIMO System TANG Lan, WANG Shu-xun, LIANG Ying-chang An adaptive space-time bit interleaving coded modulation (ST-BICM) scheme was proposed in MIMO system. Combining with power allocation, bit allocation, and bit interleaving, this system minimized the system BER under constant data throughput. An ST multilevel puncturing scheme was adopted to solve the problem of symbol-by-symbol adaptive puncturing and interleaving. In receiver, a successive interference cancellation (SIC) receiver was proposed, which has a lower computer complexity comparing to ML.
Research on Modeling and Simulation of Switched Reluctance Generator System for More-Electric Aircraft LIU Zhen, LIN Hui, XU Min The structure and principle of a More-Electric Aircraft (MEA) power system equipped with a switched reluctance generator (SRG) were investigated, and a novel method for modeling and simulation of the SRG system was proposed. In this generator system, a high performance controller was designed based on the fixed turned-on angle PWM control strategy. The SRG machine, power convertor, excitation source, controller and loads were all modeled and integrated into a SIMULINK/PSB model in order to analyze the generator system’s outputs both in steady state and in dynamic state. Simulation results verify the validity of the modeling method, and this novel method also offers a new thought for studying the characteristics of the MEA power system.
Simulation on Adjustable Discharge Valve of Underwater Compressed-Air Launcher LI Zhong-jie, WANG Shu-zong, LIAN Yong-qing, CHEN Yi-hui In order to realize the function of adjusting muzzle speed on different weapons to compressed air launcher, a method of compressed air launcher was put forward using new-type adjustable discharge valve. The mathematical model of compressed air launcher was set up and the computer simulation was carried out based on this scheme. The simulating result confirms validity of scheme.
Overview of Research on Military Conceptual Model  WU Yong-bo, HE Xiao-ye, TAN Dong-feng, SHA Ji-chang Military conceptual model is a common beginning point to the development of military M&S systems. Military conceptual model and related techniques are one of the key answers to reusability、interoperability and VV&A of M&S, and have vital meaning to development of M&S systems.  The main research on military conceptual model is summarized including related concepts、definition、modeling language、modeling process、key technologies and tools. Application and future prospect are also presented.
A kind of Optimization Based on Adaptive GA for Cerebellar Model  Articulation

LIN Xu-mei, MEI TAO1

Cerebellar model articulation (CMAC) was developed about three decades ago, but yet it lacks good learning rate parameter. Without proper learning rate parameter, the control system based on CMAC will become unstable or its learning will become slowly converged after a period of real time runs. A new kind of optimization based on adaptive GA about learning rate parameter was proposed. The performance of the proposed CMAC was compared with those of conventional CMAC. The experimental results show that performance of the CMAC based the proposed learning rate parameter is stable and more effective than that of the conventional CMAC.

Simulation and Experiment Research  of Photovoltaic Generation System and Its Islanding

 

 ZHENG Shi-cheng, DING Ming, SU Jian-hui, MAO Mei-qin, ZHANG Guo-rong  The operational principles of photovoltaic generation system and the islanding of grid-connected generation system were analyzed, and the active identification method of islanding: active frequency drift method was proposed. The simulation model of system  was established, and the experiment was researched .The results prove: experiment is almost the same as the simulation, and the output wave of grid-connected current is better, and has the same frequency and phase as utility grid, and the islanding can be detected effectively within 100 milliseconds basically.
Vega Based Virtual Collision Avoiding Technology in Simulation System of Deep-sea ROV’s Near-Ocean-Bottom Operation

WANG Zhong-hua, GE Tong, ZHU Ji-mao

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