Ontology Construction of Fault Diagnosis Knowledge Graph for Civil Aircraft Maintenance

Maintenance of civil aircraft systems is crucial for ensuring air travel safety. However, managing a large volume of maintenance data can lead to inefficiencies in operation support work. Knowledge graphs are utilized to visualize maintenance manuals and historical fault diagnosis records. Therefore, this paper presents a novel ontology construction approach for fault diagnosis knowledge graphs in civil aircraft maintenance, focusing on event domain, fault domain, and product domain. The ontology construction process follows the “ontology seven-step method.” Finally, several applications, including information retrieval, intelligent question answering, and optimal route recommendation, are implemented using this knowledge graph.