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网络作为航电系统的核心部分,其性能直接影响航电系统。AFDX网络是新一代航空电子系统的传输网络技术,具有高速、确定性和稳定性的特点。在深入研究AFDX网络协议的基础上,结合航电网络的实际应用,根据AFDX端系统关于冗余管理、完整性检测和VL隔离的特点,提出了一种AFDX端系统协议软件的设计方法。该方法通过采样、队列和SAP三类端口实现了AFDX标准数据的发送和接收功能,支持10(Mb.s-1)/100(Mb.s-1)的数据传输,并采用了VL管理、冗余管理和完整性检测方法,有效提高了数据传输的确定性和稳定性。多次的功能和性能测试表明,该软件设计方法实现了ARINC664 P7协议规定的AFDX端系统协议栈功能,具有良好的正确性和可靠性。
Network as a core part of avionics system, its performance directly affects the avionics system. AFDX network is a new generation of avionics system transmission network technology, with high speed, certainty and stability characteristics. Based on the deep research of AFDX network protocol and the practical application of avionics network, according to the characteristics of AFDX end system about redundancy management, integrity detection and VL isolation, a design method of AFDX end system protocol software is proposed. This method realizes the sending and receiving of AFDX standard data through the sampling, queuing and SAP ports. It supports 10 (Mb.s-1) / 100 (Mb.s-1) data transmission and uses VL management, Redundancy management and integrity testing methods to effectively improve the certainty and stability of data transmission. Multiple functions and performance tests show that the software design method has realized the function of AFDX end system protocol stack stipulated by ARINC664 P7 protocol and has good accuracy and reliability.