Research on test technology of airborne ADVB avionics system

In recent years, with the rapid development of ADVB (Avionics Digital Video Bus) avionics digital bus, ADVB bus has gradually replaced the original airborne DVI (Digital Visual Interface), VGA (Video Graphics Array), LVDS(Low- Voltage Differential Signal) and other video transmission modes in advanced fighter aircraft, civil aircraft, helicopters, trainers and other new test aircraft. ADVB bus is gradually replacing the original DVI (Digital Visual Interface), VGA(Video Graphics Array), LVDS (Low-Voltage Differential Signal) and other on-board video transmission modes, and has become an important data carrier in the avionics systems of advanced fighter aircraft, civil aircraft, helicopters, trainers and other new types of experimental aircraft. Faced with the test of new video bus, the existing test methods can no longer satisfy, so this paper starts from the basic protocol research, combines the ICD (Interface Control Document) structure of the airborne avionics system with the characteristic information, and completes the adaptive processing of high-speed and diversified video formats through the adaptive identification, resampling, and timing reconstruction technical paths. Through the adaptive identification, resampling, time sequence reconstruction and other technical ways, it completes the adaptive processing of high-speed, diversified video formats, realizes the generalized testing of multiple types of machines, and successfully realizes the collection and recording of unconventional videos suchas1680*1050@60fps and high-resolution videos such as 2560*1024 @30fps through the construction of a test platform, and the playback of video data is complete and clear, which verifies the validity of the method of this paper. The designed test system is compatible with the existing video test status quo, and can effectively reduce the cost of test flight and improve the efficiency of test flight.