同轨热备份GEO星座网络可靠性建模
Reliability modeling of GEO constellation network with hot backup satellite on the same track
查看参考文献24篇
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文摘
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地球同步轨道(GEO)通信卫星星座系统具有拓扑结构复杂、系统状态难以准确划分等特点.在分析包含三颗正常工作卫星和一颗同轨热备份卫星的GEO星座体系拓扑关系基础上,借助Markov过程对系统运行状态进行划分和聚合.依据Kolmogorov定理建立各聚合状态停留概率的微分方程组,通过Laplace变换及其逆变换进行星座网络可靠性指标的推导.分析备份星失效率变动时系统访问安全状态集、劣化状态集、警戒状态集和故障状态集共四类状态集的概率敏感性,为提高星座网络可靠性及制定备份策略提供定量支持.案例对某卫星通信公司设计的GEO星座体系的可靠性进行建模,对比了备份星在不同失效率下系统可靠度的变动. |
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其他语种文摘
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The topological structure of geostationary earth orbit (GEO) communication satellite constellation network is usually very complex and it is often difficult to define system state accurately.In this paper,we first analyze the topological relationships of a GEO constellation system containing three working satellites and one warm backup satellite,and then define and aggregate the system operating states by means of stochastic process.Based on Kolmogorov theorem,differential equations of aggregated state residence probabilities are built.In addition,with Laplace transform and its inverse transform,reliability indexes of the constellation network are deduced.Furthermore,probability sensitivity of the system's visiting various state sets containing safe state subset,deteriorating state subset,alert state subset and failed state subset is studied with failure rate change of the backup satellite,which can provide quantitative support for improving the constellation network reliability and adopting a backup strategy.In the case study part,we study a specific GEO constellation system of a commercial company and compare the effect of different varied failure rates of the backup satellite,which supports the theoretical conclusion in the previous part. |
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来源
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系统工程理论与实践
,2019,39(12):3188-3196 【核心库】
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DOI
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10.12011/1000-6788-2018-0952-09
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关键词
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可靠性
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热备份卫星
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敏感性分析
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Markov过程
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Laplace变换
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地址
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南京航空航天大学经济与管理学院, 南京, 211106
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-6788 |
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学科
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系统科学 |
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基金
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国家自然科学基金
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中国博士后科学基金
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江苏省研究生科研与实践创新项目
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国家留学基金
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文献收藏号
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CSCD:6697620
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