Reliability analysis of structure and control mechanism of aircraft flap

Abstract

The aircraft flap structure and its control mechanism are considered as an entire system for analysis of the system's reliability. The significant failure modes of a flap structure are based on the following engineering criteria: the magnitude of the computational safety factors of different structural members and the possible patterns that compose failure modes. According to these significant failure modes, the failure probability of a single failure mode can be computed, and the failure probability of the flap structural system can then be solved based on these single failure probabilities. For the flap control mechanism, besides the static strength reliability, it is necessary to compute the function reliability. The reliability of the control mechanism can be synthesized from the above two kinds of reliabilities. Finally, the entire flap system failure probability can be solved by synthesis of the flap structural system failure probability and the flap control mechanism failure probability.