Benefiting from the digitization of mechanical equipment, the digital twin of smart bearing can better realize the whole life cycle intelligent operation and maintenance of mechanical equipment, where the twin data are normally utilized to realize the state mapping with the identification or prediction model. Whereas, this process is mostly single interaction, and the dynamic update of the twin model and mapping results is not considered, and this makes its real application difficult. Focusing on this issue, an information scene-augmented mapping method (ISAM) is proposed for the smart bearing whole life cycle digital twin, so as to realize the accurate dynamic interaction of virtual-real scene in the twinning process. Different from the conventional digital twin models, ISAM creates an state mapping method that can dynamically update real state and simulation parameters, and it simultaneously enhances the scenario self-consistency ability based on information scene augment. First, a physical information and prior-knowledge driven feature parameter matching network (PK-FPMN) was constructed, and the actual fault size can be dynamically matched by the measured data and the dynamic model. This will realize the virtual-real scene interaction of the digital twin. Considering the difference between the twin data and the actual data, progressive style cyclic enhancement network (PSCEN) model is then introduced in the parameter matching process. By transferring the style information of the measured information scene to the twin data, the self-consistency ability of the method in different application scenarios is improved. Finally, ISAM combines the physical entity and dynamic model to form a whole life cycle digital twin of smart bearing. And the mapped degradation state and twin data can be operated for state identification and degradation prediction. Experimental results demonstrate that the ISAM can accurately map the actual degradation state and improve the quality of twin data based on the real information scene. With virtual scene and real scene interacted, the degradation state and twin data can be used for accurately state identification and degradation prediction. It can be foreseen that the proposed ISAM for smart bearing has the potential to realize the intelligent operation and maintenance of mechanical equipment in actual industrial digitization scenarios.
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