Typical failure mode and effect analysis of flight control electromechanical actuation system

摘要

Flight control Electromechanical Actuation System (EMA) has gradually been used in modern civil aircraft and has become one of the typical features of multi-electric aircraft. Since the failure mode of flight control EMA is complicated and its effect on the system is uncertain, this paper investigates the failure mechanism and failure modeling method for the typical failure modes of flight control. The effect of system design and nonlinear factors on failure characteristics can be clarified. The system architecture, fault classification and failure mechanism were firstly described. Next, the fault simulations are carried out in three different system cases, which consists of linear, nonlinear and open-closed-loop cases. Then the simulation analysis summarizes the corresponding relationships between nonlinear factors, system design and failure effects. The failure effect analysis methods can be obtained as well. In addition, the results developed in this work provide theoretical support for fault detection design, system safety-reliability enhancement and airworthiness certification.