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Theory and Implementation of Distributed Visual Simulation
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作者 徐昌伟 侯朝桢 《Journal of Beijing Institute of Technology》 EI CAS 2001年第4期429-435,共7页
The development process as well as the core theory of distributed interactive simulation and high level architecture are discussed, and combined with graphics features, a system of real time distributed visual simula... The development process as well as the core theory of distributed interactive simulation and high level architecture are discussed, and combined with graphics features, a system of real time distributed visual simulation is established. Based on computer network, simulation platform is built by installing related software and modeling object, and the interactive functions are extended by programming. A set of solutions for building a distributed visual simulation system that include both hardware and software are put forward, and a practical instance is also provided. The whole building process can be summarized into two steps that are scheme consideration and system realization. 展开更多
关键词 visual simulation distributed interactive simulation high level architecture
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Integration of naval distributed tactical training simulation system based on advanced message queuing protocol 被引量:2
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作者 柳玉 Wen Jiayan Ji Daqin 《High Technology Letters》 EI CAS 2016年第4期385-394,共10页
Aiming at the problems of unreliable data transmission,poor steadiness,nonsupport of complex data types,direct couple between data transmission and exchange,a high-level method based on advanced message queuing protoc... Aiming at the problems of unreliable data transmission,poor steadiness,nonsupport of complex data types,direct couple between data transmission and exchange,a high-level method based on advanced message queuing protocol( AMQP) is proposed to integrate naval distributed tactical training simulation system after serious consideration with current information exchange features of military combat system. Transferring layer in traditional user datagram protocol is implemented by publishing and subscribing scheme of message middleware. By creating message model to standardize message structure,integration architecture is formulated to resolve potential information security risks from inconsistent data type and express data transmission. Meanwhile,a communication model is put forward based on AMQP,which is in the center position of the whole transmission framework and responsible for reliably transferring battlefield data among subsystems. Experiments show that the method can accurately post amounts of data to the subscriber without error and loss,and can get excellent real-time performance of data exchange. 展开更多
关键词 tactical simulation message middleware advanced message queuing protocol(AMQP) software architecture distributed interactive simulation
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Dynamic Multicast Grouping Approach in HLA-Based Distributed Interactive Simulation
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作者 戴忠健 侯朝桢 《Journal of Beijing Institute of Technology》 EI CAS 2005年第1期37-40,共4页
In order to improve the efficiency of data distributed management service in distributed interactive simulation based on high level architecture (HLA) and to reduce the network traffic and save the system resource, th... In order to improve the efficiency of data distributed management service in distributed interactive simulation based on high level architecture (HLA) and to reduce the network traffic and save the system resource, the approaches of multicast grouping in HLA-based distributed interactive simulation are discussed. Then a new dynamic multicast grouping approach is proposed. This approach is based on the current publication and subscription region in the process of simulation. The results of simulation experiment show that this approach can significantly reduce the message overhead and use fewer multicast groups. 展开更多
关键词 distributed interactive simulation high level architecture (HLA) multicast group router space REGION GRID
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Modeling and simulation of torpedo acoustic homing trajectory with multiple targets
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作者 GU Hao KANG Feng-ju NIE Wei-dong 《Journal of Marine Science and Application》 2006年第2期30-35,共6页
The characteristics of a torpedo's acoustic homing trajectory with multiple targets were studied. The differential equations of torpedo motion were presented based on hydrodynamics. The Fourth order Runge-Kutta metho... The characteristics of a torpedo's acoustic homing trajectory with multiple targets were studied. The differential equations of torpedo motion were presented based on hydrodynamics. The Fourth order Runge-Kutta method was used to solve these equations. Derived from sonar equations and Snell' s law, a simple virtual underwater acoustic environment was established for simulating the torpedo homing process. The Newton iteration method was used to calculate homing range and ray tracing was approximated by pieccwise line, which takes into consideration distortions cause by temperature, pressure, and salinity in a given sea area. The influence of some acoustic warfare equipment disturb the torpedo homing process in certain circumstances, including decoys and jammers, was alsotaken into account in simulations. Relative target identification logic and homing control laws were presented. Equal consideration during research was given to the requirements of rcal-timeactivity as well as accuracy. Finally, a practical torpedo homing trajectory simulation program was developed and applied to certain projects. 展开更多
关键词 TORPEDO virtual underwater acoustic environment acoustic homing trajectory multiple targets distribute interaction simulation (DIS)
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An HLA/RTI Architecture Based on Multi-thread Processing 被引量:1
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作者 管莉 邹汝平 +1 位作者 朱斌 郝重阳 《Defence Technology(防务技术)》 SCIE EI CAS 2010年第3期182-188,共7页
In order to improve the real-time performance of the real-time HLA(high level architecture) in the application of massive data communication volume,multi-thread processing was adopted,thread pool structure was introdu... In order to improve the real-time performance of the real-time HLA(high level architecture) in the application of massive data communication volume,multi-thread processing was adopted,thread pool structure was introduced into the system,different threads to handle corresponding message queues was utilized to respond different message requests.Furthermore,an allocation strategy of semi-complete deprivation of priority was adopted,which reduces thread switching cost and processing burden in the system,provided that the message requests with high priority can be responded in time,thus improves the system's overall performance.The design and experiment results indicate that the method proposed in this paper can improve the real-time performance of HLA in distributed system applications greatly. 展开更多
关键词 computer application HLA/RTI MULTI-THREAD distributed interactive simulation system
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