Aiming at the problems of lacking of site physical characteristic data and model foundation for high-performance assembly of aeronautical thin-walled structural component with low stiffness

construction and actualizing techniques for virtual assembly prototype for aeronautical structures with on-site physical characteristics constraint were studied. Firstly

the technical connotation and construction framework of virtual assembly prototype were defined. Its essence was a highly quasi reality digital twin assembly system

which could not only carry out multi-scale assembly geometric and physical quantity simulation in virtual environment

but also analyze and verify assembly performance in advance. Secondly

high fidelity and dynamic construction on virtual assembly prototype for aeronautical thin-walled structure fused with on-site physical characteristics was elaborated from four implementation plans

i.e. multisource heterogeneous assembly data acquisition and processing

multi-class assembly digital twin integrated modeling

synchronous modeling of linking virtual with reality for assembly prototype system

visual modeling of assembly process and assembly quality condition. Finally

the “double line” and “different classification” comprehensive construction measures of virtual assembly prototype were adopted

which could provide the data/model basis for the virtual simulation during the assembly process and the accurate control of assembly quality. With the above research

a solid foundation for active real-time control of assembly quality can be established.