THE APPROACH TO GEOMETRIC MODELS FORMATION OF A DIGITAL TWIN AT THE PRODUCTION STAGE

Abstract

The article highlights the problem of ensuring the compliance of  actual geometric characteristics of aircraft units at the manufacturing stage with the characteristics provided at the design stage. For comprehensive definition of this problem, it is proposed to apply the concept of a digital twin with the usage of approaches of process geometric modeling. The application of the concept of a digital twin for technical product is nowadays one of the most effective and perspective ways to study the actual characteristics of complex technical objects, including geometric ones. Despite the fact that aircraft flight characteristics directly depend on its geometric parameters (GP), the geometric component is extremely important when creating a digital twin of the product. Note that different scientific and technical specialists interpret the concept of a digital twin in different ways. At the moment, there is no generally accepted methodology for creating a digital twin, and methods and approaches of its development are the subject of research. The article proposes an approach to forming the geometric component of a digital twin for research of the aircraft geometric parameters at the production stage by the appliance of process geometric modeling approaches. For this purpose, the life cycle of an aircraft is investigated at the production stage, aspects of the geometric parameters formation are analyzed at each stage of production, as well as the main factors are shown that can lead to deviations of geometric parameters of aircraft units and the aircraft in whole. The GP investigation stages sequence is proposed at the key milestones of the life cycle, along with the set of geometric models and their creation process. The developing process of the geometric models' sequence ensures the implementation of the concept into modern technologies of supporting the entire product life cycle, oriented on the process approach (PLM technologies).

Key words: aircraft, production, geometric parameters, digital twin, process geometric modeling.