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With the implementation and application of MBSE (Model Based System Engineering) in enterprises, a vast number of system model files is constantly and increasingly generated. The problem of how to acquire the knowledge carried by the system model and reuse the system model is urgently required to be solved. Therefore, a cross-products system model graph construction method supporting system model reuse is proposed. System model graph is constructed by defining the SysML metamodel ontology and the construction strategy is given. The entity alignment based on the relationship set and the rule-based reasoning is applied to achieve the fusion of multiple subgraphs, and the semantic extended retrieval of design requirements is realized based on this graph. Finally, the case studies of the Automatic Climate Control Integrated System of car and satellite design verify the effectiveness and practicability of the method, supporting system model reuse. In conclusion, the paper indicates that it is feasible to express the system model with knowledge graph and the constructed system model knowledge graph can well support the retrieval and reuse of cross- products system models.

Building SysML Model Graph to Support the System Model Reuse