In GNSS (Global Navigation Satellite system) distributedsimulation Environment (GDSE), the simulation task could be designed with the sharing models on the Internet. However, too much information and relation of mode...
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In GNSS (Global Navigation Satellite system) distributedsimulation Environment (GDSE), the simulation task could be designed with the sharing models on the Internet. However, too much information and relation of model need to be managed in GDSE. Especially if there is a large quantity of sharing models, the model retrieval would be an extremely complex project. For meeting management demand of GDSE and improving the model retrieval efficiency, the characteristics of service simulation model are analysed firstly. A semantic management method of simulation model is proposed, and a model management architecture is designed. Compared with traditional retrieval way, it takes less retrieval time and has a higher accuracy result. The simulation results show that retrieval in the semantic management module has a good ability on understanding user needs, and helps user obtain appropriate model rapidly. It improves the efficiency of simulation tasks design.
As advanced monitoring and controlling systems have been developed, accuracy of real-lime simulators must be improved and simulation limits must be extended. Therefore the authors have developed a distributed simulati...
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As advanced monitoring and controlling systems have been developed, accuracy of real-lime simulators must be improved and simulation limits must be extended. Therefore the authors have developed a distributed simulation system to achieve high processing performance using low cost hardware. Moreover, the authors have developed a thermal-hydraulic computer code, using drift-flux non-equilibrium model. This code can realize a high precision two-phase flow analysis, to he considered to have the same prediction capability as two-fluid models, while achieving high speed and stability for real-time simulators. The distributed plant simulator for PWR plants was realized as a result. The distributed simulator consists of multi-processors connected to each other by an optical fiber network. Controlling software for synchronized scheduling and data transfer was also developed. In terms of the code development, the numerical calculation method and implemented correlation chosen for this code are described. The simulation results during both code development and validation testing of the four loop PWR simulator are compared with experiment data and real plant data;the agreement was satisfactory for a plant simulator. The simulation speed was also satisfactory being twice as fast as real-time.
AST-CGF (Advance simulation Technology Laboratory CGF) system is a universal Computer Generated Forces system established by the key laboratory of Advanced simulation Technology in BUAA. This paper is concerned with A...
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ISBN:
(纸本)7506278413
AST-CGF (Advance simulation Technology Laboratory CGF) system is a universal Computer Generated Forces system established by the key laboratory of Advanced simulation Technology in BUAA. This paper is concerned with AST-CGF system and gives a design of the architecture for it. It also discusses the development and use procedure of the model under this simulationsystem, as well as establishing a development framework of the model. Including a series of normative interfaces, documents and collection of managing and developing tools, this framework benefits the establishing of model. The model under this framework has the features of extensibility, reusability and usability. The model framework is also an important layer of the whole AST-CGF distributed simulation system. Therefore, it plays an upholding role in the whole system.
The database architecture is classified as database, database management system and users. The database management system is composed of several core modules named as internal mode, external mode, and mapping relation...
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ISBN:
(数字)9789811026669
ISBN:
(纸本)9789811026669;9789811026652
The database architecture is classified as database, database management system and users. The database management system is composed of several core modules named as internal mode, external mode, and mapping relations. Database design is discussed as conceptual model design and physical model design respectively. Important technologies such as database connection pool and ORM mapping framework database in database access layer are discussed specially. At last, design validations are presented.
AST-CGF (Advance simulation Technology Laboratory CGF) system is a universal Computer Generated Forces system established by the key laboratory of Advanced simulation Technology in BUAA. This paper is concerned with A...
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AST-CGF (Advance simulation Technology Laboratory CGF) system is a universal Computer Generated Forces system established by the key laboratory of Advanced simulation Technology in BUAA. This paper is concerned with AST-CGF system and gives a design of the architecture for it. It also discusses the development and use procedure of the model under this simulationsystem, as well as establishing a development framework of the model. Including a series of normative interfaces, documents and collection of managing and developing tools, this framework benefits the establishing of model. The model under this framework has the features of extensibility, reusability and usability. The model framework is also an important layer of the whole AST-CGF distributed simulation system. Therefore, it plays an upholding role in the whole system.
Profound research on the atmospheric influence of aircraft model were presented and studied in details. Further studies of atmosphere environmental impact on 3 subsystem models of aircraft, such as kinematic system, E...
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Profound research on the atmospheric influence of aircraft model were presented and studied in details. Further studies of atmosphere environmental impact on 3 subsystem models of aircraft, such as kinematic system, Engine system and guidance system, had been conducted. The models and the modeling methods of these subsystems were described in detail. A distributed flight simulationsystem based on HLA was constructed and both the structure and the work flow of the flight simulationsystem had been expounded. The flight simulation sample had been implemented. Finally, simulation results and pictures were presented. It can be found that atmospheric environment has a strong influence on the flight process.
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