基于FPGA的AFDX端系统的设计与实现

摘要

Avionics Full Duplex Switched Ethernet (AFDX) is one of the best choices of avionics data bus. AFDX end-system (ES) is an important part of AFDX network. It is the channel for sending and receiving information between avionics subsystems and AFDX network, it can ensure safety and reliability of data exchange among avionics subsystems. Based on the analysis of ARINC664 specification part 7, this paper provides a solution of AFDX EX based on FPGA, and the realization of virtual link layer module is given. The test results show that the ES meets the requirements of ARINC664 specification and has high reliability and stability.%航空电子全双工交换式以太网(AFDX)是航空数据总线的最佳选择之一; AFDX端系统是AFDX网络的重要组成部分,为航空电子子系统与AFDX网络之间提供了信息收发的通道,保证了航空电子子系统之间数据交换的安全性和可靠性；文中在分析研究ARINC664规范第7部分的基础上,提出了符合该规范要求的基于FPGA的AFDX端系统设计方案,给出了虚拟链路层模块的具体实现;在TechSAT测试平台的实验结果证明,设计的端系统满足ARINC6664规范要求,具有较高的可靠性和稳定性.