AFDX的分布式仿真

航空电子全双工交换式以太网(AFDX,Avionics Full Duplex Switched Ethernet)技术基于IEEE802.3以太网和TCP/IP通用原理,对于商用货架(COTS)网络化技术如何应用于未来飞机数据网络给出了定义[1],已经成为了一种新的航空电子数据网络标准。由于AFDX协议以及航空总线布局的复杂性,采用网络仿真技术可以大大缩短网络建设周期,减小网络建设的投资风险。为了模拟AFDX的网络性能,尤其是其在数据通信方面的高可靠性和高实时性,根据AFDX协议及其传输和交换原理,建立了基于高级仿真体系结构(HLA)的AFDX分布式仿真体系,并对各子系统的构成以及仿真执行流程进行了研究。通过对仿真结果的分析,验证了仿真模型的正确性,并表明仿真设计满足系统性能要求。

Distributed simulation of the Avionics Full Duplex Switched Ethernet

Avionics Full Duplex Switched Ethernet(AFDX) based on the IEEE802.3 Ethernet and TCP/IP general principle has become a new standard of the avionic data network,which presents how COTS network technologies can be applied in future aircraft data network.Considering the complexity of both the AFDX protocol and the layout of the aviation bus,simulation can shorten the construction cycle of the network and reduce the investment risk.To simulate the AFDX network performance,especially its high reliability and high real-time performance in data communication,a distributed simulation system of AFDX based on High Level Architecture(HLA) was built up according to the protocol of AFDX and its transmission and switch logic.The composition of each subsystem and the execution process of simulation are also studied.Simulation results verified the correctness of the simulation model,and indicated that the simulation design may satisfy the system performance requirement.