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数据总线已成为实现机载电子设备功能综合,信息综合的关键所在。它渗透、溶合于整个航空电子综合系统之中,而成为不可分割的组成部分。数据总线性能的好坏直接影响到整个系统综合能力的优劣和综合程度的高低。因此,随着航空电子综合化的强化,数据总线的面貌也不能不发生变化,以适应其要求。即使在按照同一标准研制的大规模集成芯片功能上,也带有各生产厂家的技术特色。本文试从三个方面论述国外机载数据总线的现状和发展趋势。首先,对目前业已装备飞机使用的三种标准的数据总线性能作了对比。其次,以使用最广的1553B 总线为例,列举了美国几个主要厂家关键芯片 BIU 的性能指标,以求窥视1553局部网络实际技术发展的方向。第三,对比美国和北大西洋集团为了统一今后舰载系统所制定的高速数据总线标准 STANAGd153、美国高速机载数据总线 DDCIOMHz 及目前使用的几种标准的总线,以求看出1553取代标准 MIL-STD-1773的趋势。
The data bus has become the key to realizing the function integration and information synthesis of airborne electronic equipment. It infiltrates and dissolves into the entire avionics complex and becomes an integral part of it. The performance of the data bus directly affects the merits and demerits of the overall system and the level of comprehensiveness. Therefore, with the enhancement of avionics integration, the face of the data bus can not but change to meet its requirements. Even in accordance with the same standard developed by large-scale integrated chip functions, but also with the technical characteristics of each manufacturer. This article discusses the current situation and development trend of foreign airborne data bus from three aspects. First, compare the performance of the three standard data buses that are currently used in aircraft. Secondly, taking the most widely used 1553B bus as an example, the performance indexes of BIU, the key chip of several major manufacturers in the United States, are listed in order to peep the direction of actual technology development of the 1553 local network. Third, comparing the high-speed data bus standard STANAGd153 developed by the United States and the North Atlantic Group to unify the future carrier-based system, the DDCIOMHz high-speed airborne data bus in the United States and several standard buses currently used in order to see that the 1553 replaces the standard MIL- STD-1773 trend.