To meet the need of evaluating fight efficiency of modern aviation weapon systems, a scheme of air combat simulation system based on distributed interactive simulation (DIS) was presented. With describing the architecture, the function divisions and the critical technology points of the scheme, an experimental example of air combat simulation using this system in a virtual simulation environment was introduced. The simulation results showed that the new scheme can develop much better simulation content, scale, reality and reliability than traditional methods and so displayed broad application foreground.

The definition, research objects and main research contents of simulation science and technology (SST) were introduced. Its significance, development history and the relationship with other disciplines were analyzed. A knowledge system consisting of theoretical foundation, specialized knowledge and methodology for SST was proposed. Academic degrees and graduate education of SST in China and abroad were studied and summarized. The study shows that the education conditions of SST discipline in Chinese key universities are good and the social requirements for SST personnel are large in China. Finally it is concluded that SST is a new discipline developed when mankind steps from the industry society into information society, SST becomes a mature discipline, and a large numbers of excellent PhD/MSc graduates of SST have been educated in China. Therefore, the discipline of SST should be a first-level degree program in discipline catalog of China education ministry and its second-level degree programs could be simulation modeling theory and methodology, simulation systems and technology, simulation application engineering.

Through its rapid development during recent thirty years, MS has become a universal and strategic technology. It has brought broad applications and deep impact on many areas around the world, so the importance of MS degree education has been recognized. The situations about degree education pattern, objectives, the rules of education program, mainly taken by universities in the world, were introduced. Then based on these, the body of knowledge (BOK) was analyzed, and the principle of BOK establishment and the core content of BOK were proposed. In order to support the subject setting of Simulation Science and Technology in China, the body of course (BOC) and the core courses of BOC were discussed.

Virtual sound modeling and rendering are key technologies in the virtual environment of an aircraft simulator. Based on physical acoustics, psychoacoustics, architectural acoustics, room acoustics and digital audio technology, a synthetic underline audio modeling method and an optimal dynamic audio rendering algorithm are presented for a distributed aircraft simulation system. Large-scale sound data are remodeled by the digital compressor, expander and aural exciter. A 5-segment equal loudness level contour is proposed and an advanced compressor ratio algorithm is realized based on psychoacoustic parameters. An equivalent absorption coefficient and reverberation time estimating algorithm are also presented based on virtual capsule environment information. Frequency spectrum and formant data samples are summarized according to different state variables and a back propagation (BP) network algorithm is realized by several equalizer parameters adjusted in real-time thrust noise simulation. A real-time virtual sound system is adopted in a certain aircraft simulator based on high level architecture (HLA) which makes the aural rendering more accurate and vivid.

High resolution video displaying is widely needed in the area of simulation, virtual reality and entertainments. The paper proposed a multiple projectors based video display system, which is constructed by a hierarchical architecture and manages the distributed video data by Master-Slave model. With the event-based driven model, the proposed system synchronizes the nodes and windows decoding, rendering and displaying. Combining with BH-TDAPI, the system can project seamless tiled images on large scale screens and get seamless, tiled, wider images. Experiments demonstrate the system’s great scalability and high cost performance.

引言 "系统建模与仿真技术"是以建模与仿真理论为基础,以计算机、物理效应设备及仿真器为工具,根据研究目标,建立并运行系统模型,对研究对象(系统)进行认识与改造的一门多学科的综合性、交叉性技术.其中,模型(model)是对实体、过程、系统、现象的数学、物理或逻辑的描述,仿真(Simulation)是模型随时间运行的手段和方法.

Synthetic natural environment (SNE) data is different from the general entity data. SNE data are data-field changing with time and space. The hierarchical synthetic environment database system was designed according to the SNE data characteristics and the simulation application needs. The SNE database system included primary environment database, standard environment database compatible with synthetic environment data presentation interchange specification (SEDRIS) and run-time environment database. Primary environment database was composed of all kinds of primitive data. The standard database compatible with SEDRIS was completed combined relational model with object model. The run-time database was developed using memory database technology. Finally, a simulation instance was used to validate the synthetic environment database performance. The results show that synthetic environment database can support the diverse application needs, and can meet real-time simulation requirement.

自然场景仿真是虚拟现实技术的重要部分,夜间海上飞行时,星空、月亮以及海面的倒影是独具特色的自然场景.为营造沉浸感强的夜海飞行虚拟现实系统,用粒子系统实现了星空的模拟,将星体动态闪烁现象演化为粒子生命的概念,并按照主导算法加扰动的思想实现星空随机性模拟;用特殊纹理融合算法模拟月亮及星月在海面的镜像,特殊纹理经过制作、着色和融合3个过程,并根据夜空景像在海面倒影的亮度衰减规律确定融合因子,将纹理和背景按照融合因子进行深度融合;最终实现了较逼真的夜海飞行虚拟现实系统.

Based on abundant characteristic of SNE data and the requirement of real time performance during simulation runtime, SNE database was divided into SNE database of SEDRIS standard and running SNE database, and the development process of SNE database was provided. It was analyzed how to utilize SEDRIS kernel technology namely DRM (Data Representation Model), EDCS (Environmental Data Coding Specification), SRM(Spatial Reference Model), API(Application Program Interface) and STF (SEDRIS Transmittal Format) to realize environmental data representation, and achieve standardization of environmental data, and build SNE database. The relative technology was discussed during the process of constituting database based on the SEDRIS standard. Atmosphere database of hiberarchy was built.

The development of the distributed simulation technology is greatly dependent on the development of computer technology and information technology.Characterized by information sharing and collaboration,the grid technology provides new thoughts for the simulation application.The features of grid technology and distributed simulation technology are analyzed,and the consistency in design conception between them is discussed.Using the grid technology thoughts for reference, the architecture for complex distributed simulation system is emphasized.The architecture of aviation domain could be divided into simulation research and development environment,run time environment and resource repository.The aviation system simulation integrated environment would provide effective technical methods and comprehensive platform for the design of aviation weapon systems.

A model is a physical,mathematical,or logical representation of a system,entity,phenomenon,or process.Simulation is a method for implementing a model over time.Modelling and Simulation are widely used in all life cycle of products:requirements analysis,concept development,preliminary design,detailed design,manufacturing,testing,and training.Some key technologies of modelling and simulation are discussed in this paper.

The modeling and simulation of Synthetic Natural Environment (SNE) is an important component of distributed complex simulation system, and the modeling and simulation platform of SNE in distributed complex simulation system support environment was put forward, and the development environment and running environment were divided into two parts in this platform. In the development environment, the environmental database was built in terms of SEDRIS (Synthetic Environment Data Representation and Interchange Specification), and the foundation was built for sharing of environmental data. In running environment, the method of environmental federate was adopted, and the abundant characteristic of environmental data was taken into account. Key technologies involved with the modeling and simulation platform of SNE were analyzed and realized, and the detail process of development was provided.

The modeling and simulation (M&S) architecture describes and defines the relationship between the different parts of a simulation. The simulation system architecture and simulation support platform architecture are discussed separately. The simulation support platform architecture consists of the management layer, the resource layer, the communication layer, the application layer and the infrastructure layer. The best way is to design and realize the M&S collaborative environment for simulation support platform in the resource-communication-application three-dimension space.

The programming of HLA application software is very complex.In order to make the development convenient,and decrease developing time and workload at the same time,encapsulation of RTI application programmable interface(API) was studied.As the result,concepts of HLA application software frame,data structure templates,and program code templates were proposed.Encapsulation of HLA function was discussed based on these concepts,such as object class publish model,discover object instance model,mission focused model,and so on.By using the templates,different kinds of simulation system could be developed under the developing frame.

Synthetic natural environment (SNE) includes four primary domains: terrain, ocean, air and space. As an important part of air environment, variable wind field would affect the performance of aircraft. Considering the two main representations of variable wind field, the engineering simulation method of wind shear and atmospheric turbulence were established. With a simulation example of a certain missile, the effect of variable wind field to the attitude and track characters of the missile was analyzed. The results show that the model established is valid and practicable for engineering.

MS architecture describes and definitudes the relationship between different parts of modeling and simulation. In this paper we discuss the simulation system architecture and simulation support platform architecture separately. Simulation support platform architecture consists of management layer, resource layer, communication layer, application layer and infrastructure layer. The best way is to design and realize the MS collaborative environment for simulation support platform in the resource-communication-application three-dimension space.

In order to meet the training requirement of a person controlling the Aerial Vehicle on the ground,an Unmanned Aerial Vehicle Simulation Training System based on a new type Aerial Vehicle is constructed and realized.The structure of system and implementing procedures are introduced.In this paper,a wavelet filter method for flight data is provided.The system is composed of command and control,datalink communication,flight control,mission load and displaying.It reproduces the whole actual procedures of a person controlling Aerial Vehicle.For training a controlling person,the Unmanned Aerial Vehicle Simulation Training System makes the period of training shorter and shorter,makes the cost less and less,and is a more advanced training method.The success of system development is very important for improving efficiency of training controlling person and expanding the application of the new type Aerial Vehicle.

多联邦系统的逻辑结构对系统的开发、运行、以及可扩展性有着重要的影响.提出了基于树形拓扑结构的多联邦系统,在此系统中联邦之间通过代理（proxy）相互连接,每个联邦只与上级和下级联邦存在直接的逻辑连接关系,避免了数据传输多通道问题和传输回路等问题.针对实时树拓扑结构分级多联邦系统,提出了利用运行时间框架（RTI,Run-TimeInfrastructure）的时间管理机制对系统的时间推进进行同步的策略,通过合理设置时间主控联邦成员和受控联邦成员,源自根联邦的同步信号能够通过树拓扑结构传递到最底层的叶联邦,从而保证了整个系统在时间推进上的同步.最后分析了系统中同步信号的时间延迟,给出了计算时间延迟的公式.该公式显示,系统分级越多,同步信号的时间延迟越大.

给出了一种不确定非线性系统的基于模糊观测器的故障诊断方法.用T-S模型描述不确定非线性系统,从而得到一种新的模糊观测器,并给出了其稳定性约束条件LMI.将模糊观测器和实际系统的输出之差作为残差可对不确定非线性系统进行故障检测.最后给出了一个控制系统感应电机的故障诊断应用实例.