Testability Design and Analysis of an Airborne Avionics System

This paper is related of the avionics system development of a national application project, which involves a certain type of military trainer aircraft. According to the overall design requirements, this aircraft avionics system needs to fulfill the testability requirements. Based on the research and development process, this paper introduces the structure of the avionics system, and assigns the system indexes according to the system testability requirements and the system reliability model.Then it introduces how to reasonably design the detection circuit according to the allocation. By combining with FMECA, the BIT system architecture is completed in the system, and the testability results are analyzed.