关键词: 系统理论过程分析（STPA）, 复杂网络, 襟翼控制系统, 故障分析

Abstract: Aiming at the limitations of systems-theoretic process analysis (STPA) in the safety analysis of civil aircraft airborne systems, this study firstly transforms the control structure model into a causal propagation network based on complex network theory. Parameters such as in-degree and out-degree are used to reflect information interac鄄 tion and causal propagation situations, enabling the identification of key components responsible for system fail鄄 ures for targeted prevention and control. Secondly, improvements are proposed for the STPA method in three as鄄 pects, including safety requirement capture, safety verification and key cause identification, to enhance the pro鄄 cess of system safety assessment confirmation and verification. Finally, the flap control system is taken as a prac鄄 tical object to verify the feasibility and effectiveness of this method, which can provide a systematic safety analy鄄 sis approach for complex airborne systems.

Key words: systems-theoretic process analysis (STPA), complex network, flap control system, fault analysis