Periodic message-based modeling and performance analysis of AFDX

Avionics Full Duplex Switched Ethernet (AFDX) has developed into a new generation avionics bus system with its superior performance of network communication, such as the low cost, good scalability, and deterministic latency. Based on periodic message, this paper gives the Petri Net model of AFDX and simulates it, and the solving of the model provides two important performance indices—network load and delay time in the process of periodic message transmission. It helps to further the understanding of the message transmission mechanism of AFDX network by analyzing the performance curve, and proves that AFDX can satisfy the transmission requirement of new generation avionics bus system, which provides the important technology support for the design and improvement of the system.