Abstract: As the modern aviation industry continues to evolve,flight simulators have become increasingly crucial for pilottrai-ning,system testing,and fault diagnosis.Among the tools used to enhance pilots' ability to handle abnormal conditions,fault tree analysis plays a pivotal role in ensuring the rationality of simulator design.Addressing the redundancy backup design in aviation systems,we propose a fault tree generation method based on network decomposition.This method takes system structure diagrams and target nodes as input,analyzes the connectivity paths within the network,and generates intuitive and clear fault trees.Common logical gates such as AND and OR are employed for readability and ease of integration with other software.The algorithm not only reduces manual workload but also enhances the efficiency and accuracy of simulator design.Additionally,we introduce a weighted node selection rule and simplify common topologies to optimize network decomposition efficiency.Finally,through examples using partial network diagrams of aircraft systems,we validate the correctness and performance of the proposed algorithm.

Key words: Fault tree, Aircraft flight simulator, Complex network, Network decomposition, Aircraft system