论文部分内容阅读
航空航天生产厂商正在寻求减少航空电子系统重量、体积及功耗要求的各种途径。同时，航空电子设备的数量及复杂性连续剧增。为了满足这些对立的要求，就需要进行高水平的综合．ＳＡＥ（汽车工程师协会）一直在设法解决先进的航空电子系统对数据总线的需要。自１９７９年起，ＳＡＥ已成立各任务组，开发一系列民用数据总线标准，这些标准是为满足航空电子应用上独特的容错要求而特别设计的，即：ＡＳ４０７４．１线性令牌传递多路转输数据总线（ＬＴＰＢ）ＨＡＳ４０７４．２高速环形总线（ＨＳＲＢ）。本文说明了两种总线标准的背景，简要概述两种规约，并评述了现在及未来ＳＡＥ在航空电子数据总线领域的活动。
Aerospace manufacturers are looking at ways to reduce the weight, size and power requirements of avionics systems. At the same time, the number and complexity of avionics continued to increase dramatically. To meet these conflicting demands requires a high level of synthesis. SAE (Automotive Engineers Association) has been trying to address the need for advanced avionics systems on the data bus. Since 1979, SAE has set up task forces to develop a series of civil data bus standards that are specifically designed to meet the unique fault tolerance requirements of avionics applications: AS4074.1 Linear Token Transfer Multiplexer Input Data Bus (LTPB) HAS4074.2 High Speed Ring Bus (HSRB). This article describes the background of the two bus standards, briefly outlines the two statutes, and reviews current and future SAE activities in the avionics data bus.