Mission reliability modeling method of integrated modular avionics system based on Stateflow

Integrated Modular Avionics (IMA) system is modular and with ability of reconfiguration, however its reliability model and analysis is complex. In this paper, a modeling and simulation method was designed upon the principle of the technology of Stateflow to analyze its mission reliability. At First, IMA system fault logic process is discussed considering reconfiguration strategy when lower layer module is broken down. Then, system simulation model is put forth with assumption of exponential distribution which lower layer module fault time obeys to simulate system mission failure time by Monte Carlo method. Finally, design and simulation process in a simplified IMA system is provided and the validity and rationality of the method is validated by the result.