基于HLA-RTI的AOS多信源链路层接收仿真系统研究

发布时间：2018-06-24 06:54

本文选题：AOS + HLA-RTI　；参考：《沈阳理工大学》2015年硕士论文

【摘要】：为了达到空间技术的发展水平,满足航空、航天诸多的复杂任务需求,国际空间数据系统咨询委员会(CCSDS)在1986年发表并扩展了高级在轨系统(AOS)协议。目前,AOS系统在航空航天技术领域尤为重要,相应的仿真技术也变得越来越先进,而HLA-RTI可以通过面向对象的方法来建立仿真系统模型,可以实现联邦成员在仿真系统中的交互,能够很好的AOS接收系统的仿真。本文是对基于HLA-RTI的AOS多信源链路层接收仿真系统进行研究,重点在于对帧同步模块和虚拟信道分用与字节提取模块进行仿真设计与实现。首先,给出了基于HLA-RTI的AOS多信源链路层接收仿真系统的总体设计,安装并配置了分布式仿真运行支撑工具MAK-RTI2.2和VR-Link3.9.1,以及软件开发工具Visual C++6.0,并给出了联邦功能设计以及基于UDP协议下的Socket通信接口设计方法,以便在此基础上进行仿真模块的设计。其次,分析设计了帧同步仿真模块。介绍了帧同步的原理,分析了漏检现象和虚警现象,并对帧同步四种状态转换进行了详细的分析,再根据AOS帧同步系统参数建议值,得出部分最佳同步码型(ASM)。在此基础之上对五种不同的信源进行帧同步的模块设计,得到帧同步运行的仿真结果,该结果可以很好的反映出帧同步的合理性与必要性。然后,分析设计了虚拟信道分用和包提取、字节提取模块。介绍了虚拟信道分用原理和包提取、字节提取原理,针对五种不同的信源设计出五个不同的VCID,在此基础之上对五种不同的信源进行虚拟信道分用和包提取、字节提取的模块设计,给出了虚拟信道分用和包提取、字节提取后的仿真结果,很好的实现了AOS接收系统的仿真。最后,对白噪声环境下的AOS传输系统性能进行了仿真研究。利用了VC与Matlab混合编程的设计方法。并以文本信息数据为例,仿真了噪声干扰所造成的影响,给出了文本信息数据字节出错的仿真测试结果。
[Abstract]:In order to achieve the development level of space technology and meet the needs of many complex missions in aviation and aerospace, the International Space data system Advisory Committee (CCSDS) published and extended the Advanced in-orbit system (AOS) protocol in 1986. At present, the AOS system is particularly important in the field of aerospace technology, and the corresponding simulation technology has become more and more advanced. HLA-RTI can establish the simulation system model by object-oriented method, and realize the interaction of federates in the simulation system. Can very good AOS receiving system simulation. In this paper, the simulation system of AOS multi-source link layer based on HLA-RTI is studied. The emphasis is on the simulation design and implementation of frame synchronization module and virtual channel separation and byte extraction module. Firstly, the overall design of AOS multi-source link layer receiving simulation system based on HLA-RTI is presented. The distributed simulation running support tools MAK-RTI2.2 and VR-Link3.9.1 and the software development tool Visual C 6.0 are installed and configured. The design of federated function and socket communication interface based on UDP protocol are also given. In order to carry out the design of simulation module on this basis. Secondly, the frame synchronization simulation module is analyzed and designed. This paper introduces the principle of frame synchronization, analyzes the phenomena of missing detection and false alarm, and analyzes in detail the four state transitions of frame synchronization. Then, according to the suggested values of AOS frame synchronization system parameters, the partial optimal synchronous code type (ASM) is obtained. On this basis, the frame synchronization module of five different sources is designed, and the simulation results of frame synchronization are obtained, which can reflect the rationality and necessity of frame synchronization. Then, the virtual channel partition and packet extraction, byte extraction module are analyzed and designed. This paper introduces the principle of virtual channel separation, packet extraction and byte extraction, and designs five different VCIDs for five different sources. On this basis, the virtual channel separation and packet extraction of five different sources are carried out. The module of byte extraction is designed, and the simulation results of virtual channel and packet extraction are given, and the simulation of AOS receiving system is well realized. Finally, the performance of AOS transmission system in white noise environment is simulated. The mixed programming method of VC and Matlab is used. Taking the text information data as an example, the effect of noise interference is simulated, and the simulation test results of the error of the text information data byte are given.
【学位授予单位】：沈阳理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：V411.8

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