GEOMETRIC MODELING IN THE ASPECT OF PRODUCT DIGITAL TWIN CONCEPT

Features of reproducing aircraft design geometric parameters during the production stage analyzed in the presented study. Problematic issues highlighted on unit production and aircraft final assembly due to the influence of various objective and subjective factors on variations of geometric parameters of a product. Such factors can be fluctuations in the ambient temperature, internal stresses of the material, the accumulation of errors, and inaccuracies in design calculations, et cetera. Lines determined for comprehensive solutions of problems on geometric parameters variations by creating a sequence of geometric models with actual geometric parameters using the concept of a digital twin. It was demonstrated that the geometric model sequence of aircraft outer contours is an integral component of its digital twin and the basis for the designing of models of different technical paths. It was proposed to apply the methodology of structural-parametric modeling using approaches of process-based geometric modeling to create the sequence of geometric models of an aircraft digital twin. It was demonstrated that approaches to the creation of geometric models of a product actual geometric parameters at the production stage are different from methods used for geometric modeling at the steps of research and development. A number of the main issues were considered that facing the design and technological departments when creating models of actual geometric parameters of aircraft units at each stage of its production. The general directions were determined for further research of geometric modeling methods to solve the problems of changing geometric parameters during the manufacturing of aircraft. The materials presented serve as the basis for the development of appropriate geometric models and software tools for computer-aided design.