Knowledge Graph Based Method for Tracing Quality of Aerospace Products

Abstract

Nowadays, the internal structure of spacecraft has been increasingly complex. As its “lifeline”, cables require extensive manpower and resources for manual testing, and it is challenging to quickly and accurately locate quality problems and find solutions. To address this problem, a knowledge graph based method is employed to extract multi-source heterogeneous cable knowledge entities. The method utilizes the bidirectional encoder representations from transformers(BERT) network to embed word vectors into the input text, then extracts the contextual features of the input sequence through the bidirectional long short-term memory(BiLSTM) network, and finally inputs them into the conditional random field(CRF) network to predict entity categories. Simultaneously, by using the entities extracted by this model as the data layer, a knowledge graph based method has been constructed. Compared to other traditional extraction methods, the entity extraction method used in this study demonstrates significant improvements in metrics such as precision, recall and an F1 score. Ultimately, employing cable test data from a particular aerospace precision machining company, the study has constructed the knowledge graph based method in the field to achieve visualized queries and the traceability and localization of quality problems.

Keywords

knowledge graph / named entity recognition / quality control / aerospace product

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