大型民机配电系统AFDX总线应用技术研究

Research on Application Technology of AFDX Bus in Distribution System of Civil Aircraft

基于AFDX通讯总线模拟了大型民机配电系统的高速通讯网络,对配电系统中AFDX总线的应用技术进行了研究,提高了配电系统软件在AFDX总线中的读写效率和兼容性,为系统中AFDX总线的应用提供了借鉴和参考;首先分析了AFDX通讯总线的组成和关键技术,并构建了大型民机配电系统的模拟通讯网络;随后,进行了AFDX总线端系统应用软件的研究,采用数据压缩和基于"位运算"的数据处理方法;以LabVIEW软件为例,针对端系统中用户软件无法开发相应的AFDX总线驱动问题,设计了无AFDX底层驱动软件与AFDX通讯网络的接口程序;并基于AFDX总线的采样端口模式,提出了一种基于AFDX网络的多余度系统的冗余通讯方法;最后,通过通讯实验验证了接口程序及冗余通讯方法的正确性和可靠性。

Based on AFDX communication bus,this paper simulates the high-speed communication network of civil aircraft distribution system,and studies the application technology of AFDX bus.Firstly,the composition and key technologies of AFDX communication bus are analyzed.Then,an analog communication network for civil aircraft power distribution system is constructed.The method of data compression and data processing based on bit operation is adopted to improve the efficiency of communication data reading and writing.The interface program of communication network between LabVIEW and AFDX is designed.The application of end system based on LabVIEW software in AFDX bus is realized.Based on the sampling port mode of AFDX bus,redundancy communication problem of redundant system in network is solved.