| 基于时间触发通信的机载网络可靠性 |
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| 引用本文： | 马跃,朱纪洪,杨佳利. 基于时间触发通信的机载网络可靠性[J]. 计算机工程与设计, 2020, 41(5): 1201-1206 |
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| 作者姓名： | 马跃 朱纪洪 杨佳利 |
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| 作者单位： | 清华大学计算机科学与技术系,北京100084;清华大学计算机科学与技术系,北京100084;清华大学计算机科学与技术系,北京100084 |
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| 摘 要： | 根据分布式综合模块化航空电子(DIMA)系统的组网需求,对比事件触发(ET)机制和时间触发(TT)机制,分析时间触发以太网(TTE)的网络特性,说明TTE应用到DIMA的可行性和必要性。针对航空电子系统的高可靠性需求,采用贝叶斯网络分析TTE在环形拓扑、网状拓扑和星型拓扑等结构下的系统可靠性,分析结果表明,在多余度的情况下,星型拓扑具有最高的可靠性。总结了TTE应用到DIMA的拓扑结构选择和余度设计原则,即根据不同的应用场景和通信节点的重要程度,选择合适的拓扑结构和余度。
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| 关 键 词： | 分布式综合模块化航空电子系统 时间触发网络 可靠性 贝叶斯网络 余度设计 |
Reliability of airborne network based on time-triggered communication |
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| MA Yue,ZHU Ji-hong,YANG Jia-li. Reliability of airborne network based on time-triggered communication[J]. Computer Engineering and Design, 2020, 41(5): 1201-1206 |
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| Authors: | MA Yue ZHU Ji-hong YANG Jia-li |
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| Affiliation: | (Department of Computer Science and Technology,Tsinghua University,Beijing 100084,China) |
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| Abstract: | The event-triggered(ET)and time-triggered(TT)mechanisms were compared according to the networking requirements of distributed integrated modular avionics(DIMA).The network characteristics of TT Ethernet(TTE)were analyzed to illustrate the feasibility and necessity of applying TTE to DIMA.For high reliability requirements of DIMA,Bayesian network was used to analyze the system reliability under ring,mesh and star topological structures respectively.Results show that the star topology has the highest reliability when networking redundancies are considered.For applying TTE to DIMA,some suggestions in networking topology and redundancy are also provided according to concrete application scenarios and different significances of communication nodes. |
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| Keywords: | DIMA time-triggered Ethernet reliability Bayesian networks redundancy design |
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