Abstract: The function of hardware and Sorftware structure of ground simulating and inspecting systems for airborne electronic devices has been discussed in this paper, as an example, a real simulation and test system is given.The system connects different kinds of 11 microcomputers as DIMENSION 68000, S'DK-86,TP-801 to compose a distributed simulation and test network through a 8-terminal optic fiber communication net.The system can imitate signals of the motive target of radars and signals of ARINC-429 of the Navigation Subsystem and the air data computer.It can receive,store and process the realtime data from the airborne electronic devices, perform erorr analysis, draw curves of the motive target, print tables of various test parameters by directly interfacing to the airborne devices. The system is easy to use and operate with perfect function.The technique criteria accomplished and evaluation of the system are also given.

Key words: avionics simulation, airborne data bus, distributed computer system