基于高级在轨系统的虚拟信道技术研究本科生毕业（设计）论文.docVIP

摘 要 ?为了适应空间技术的发展满足复杂航天器的数据处理需求国际空间数据系统咨询委员会CCSDS开发了高级在轨系统AOS。AOS以标准化的方式进行数据处理与交换能够在空间链路中双向传输音频、视频、科学实验等多种不同类型的数据。目前AOS在航空航天技术领域中的作用越来越突出。AOS的核心技术之一是虚拟信道调度策略。合理的调度算法是保证AOS能够高效、有序的在同一物理信道上传输多种不同类型数据的关键。本文重点对AOS中虚拟信道调度算法进行研究接着对虚拟信道调度中的经典虚拟信道调度算法进行研究。 最后对传统的虚拟信道动态调度算法进行了分析通过建立虚拟信道调度的仿真模型对虚拟信道调度算法进行仿真实验Abstract In order to adapt to the development of space technology,to meet the complex spacecraft data processing needs,CCSDS in 1986 developed advanced orbiting system. AOS in a standardized way for data processing and exchange,can in the space link in a variety of bidirectional transmission of audio,video,scientific experiment data of different types.At present,the AOS and role in the field of aerospace technology in more prominent.One of the core technology of AOS is the virtual channel scheduling strategy.Rational scheduling algorithm is to guarantee that AOS can be efficient,orderly transfer key to many different types of data in the same physical channel. This paper focuses on the study of virtual channels in AOS scheduling algorithm,the main contents include:first,The virtual channel is studied, and the research on the channel division and package are both introduced in detail, then, we also study the classical virtual channel scheduling algorithm in the virtual channel scheduling. Finally, the virtual channel scheduling algorithm of traditional is analyzed, through carrying out the simulation model for the establishment of virtual channel scheduling, we do some simulation experiment on the classical virtual channel scheduling algorithm.Study the static priority algorithm, time slice rotation and first come first serve three scheduling algorithms, and then we make the simulation experiment of the virtual channel scheduling algorithm, the results obtained are compared and analyzed. Keywords: CCSDS ;AOS;dispatching algorithm;Virtual channel 目 录 1 绪论 1 1.1 课题研究的背景和意义 1 1.2 国内外研究现状 1 1.2.1 国外研究现状 1 1.2.2 国内研究现状 2 1.3 本论文的结构安排 2