A Method of Data Acquisition Network Delay Measurement for AFDX Avionics System in Flight Test

Full Duplex Switched Ethernet AFDX is gradually replacing the traditional 1553B as the architecture of the new generation avionics system. AFDX bus has the characteristic of Ethernet delay. However, special needs for measuring avionics AFDX network delay are required to meet in flight test. According to the characteristics of flight test, this paper proposes a method of data acquisition network delay measurement for AFDX avionics system to solve the puzzle of delay measurement. The experiments on a test aircraft demonstrate that the method can improve the calculation accuracy of an avionics system and it’s effective in engineering applications.