Vxi Bus Automatic Test Design And Development Of The Hardware System

This dissertation focused mainly on the research of an automatic test stand for Flight Management Computer (FMC), and some test technique based on VXI bus system was discussed. First, the testing principle and the functions of Built In Test (BIT) of FMC were introduced, as well as their functions in testing of the FMC interface were analyzed in detail. Then, the general design plan of the hardware system for the test stand was made on the base of some researches of VXI bus techniques. With respect of the analysis results of the input and output signals of FMC , the functions of each subsystem module were proposed, and the frame of each subsystem module were on reference of the VXI structure. According to the bus signal distribution rule of EISA and PCI , the bus signal distribution method of the no source motherboard of the switching box was proposed, and the address identification, switching control and back-loop self test control were specified to meet the needs of system control and reliability. Finally, the detailed principle design for each switching board was given, and the circuit schematic drawing of discrete input switching board was presented. The reliability design and some experimental result analysis were made on conclusion.