Reliability analysis of flight control system for large civil aircraft with Imperfect Fault Coverage Model

Reliability of flight control system (FCS) is a key factor of the aircraft safety. Therefore, redundant technology and Built-in Test (BIT) technology are usually adapted by flight control system for modern large civil aircraft so as to improve the system reliability. Taking Boeing 777 as an example, Imperfect Fault Coverage Model (IFCM) is built with the analysis on the influence of dissimilarity technology, redundant bus, and false alarm of BIT technology. Finally, the comparisons on reliability calculation between the IFCM proposed in this paper and other analytical models are presented. The computational result shows that, by taking into account more complex conditions, the proposed method is of great value in engineering applications and analysis.