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.
Today, more and more software-intensive equipments are used in weapons, and their reliability is gradually being looked closely. For these equipments, software and hardware are coupling; their reliability can't be verified separately. Design testing profile is an important work to reliability verification. Hardware test profile design method is mature relatively. Software test profile design and test case generation method is developing. Although several operation profile construction methods have been proposed, they are not fit for hardware & software (SW&HW) cotesting. This paper combines testing profile of hardware, with utilized information of mission profile and environment profile, divides operation profile into three layers and model by diverse UML diagrams. This method considers both input parameters complexity and real-time requirements. It can be used in operation profile design and test case generation of SW&HW reliability co-testing.
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