Research on Cascading Effect Analysis of Civil Aircraft Shared Data and Resource System Failures

Failures of shared data and resource system have now become a key concern in civil aircraft development process during recent years, especially considering the increase of the complexity and integration level of aircraft systems. Cascading and cumulative effect of these kind of failures needs to be investigated very well to ensure aircraft safety, for the reason that common systems always have lots of interfaces with other systems, and failures can propagate significantly due to the dependency of airborne systems. Considering current safety analysis approaches such as Failure Mode Effect Analysis (FMEA) and Fault Tree Analysis (FTA) are more applicable for federated systems architecture, this thesis presents a systematic way to Figure out all the direct or indirect effects caused by the shared data and resource system failures. A logic and iterative process, illustration of each steps, the synthetic evaluation and verification means are studied. Research contents and relevant practice provided in this thesis can be an important supplement to the safety process and airworthiness certification of civil aircraft development.