To promote the digital transformation and upgrading of smart manufacturing,a conceptual model of the digital twin for smart manufacturing is proposed.It includes four dimensions:requirements of the conceptual model,architecture of the conceptual model,and methods to ensure the accuracy and reliability of the conceptual model.Based on this conceptual model,the technical framework of the digital twin for smart manufacturing is introduced.Key technologies such as digital twin modeling,simulation,and data analysis are analyzed,and future technological developments are prospected.
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