Unmanned Aerial Vehicle Mass Model Peculiarities

Toward Building a Functional Image of the Design Object in CAD

“…The perfection of the chosen scheme is characterized by functions of the airframe geometry such as the lift coefficient Cyα, drag coefficient Cxα, aerodynamic quality K, and the efficiency of the power unit, which are functions of the gas dynamic characteristics of the engine, e.g., the specific fuel consumption Cp and the relative fuel mass mt [14].…”

“…The traditional solution to the problem of selecting rational options for design solutions at the preliminary design stage is to use empirical or approximate analytical dependencies to determine the aerodynamic and flight characteristics [14]. The same path was proposed in the works of recent years [15,16].…”

“…The number and types of these sub-models can change when moving between hierarchical levels (product, assembly, assembly, and part) and development stages. For an aircraft, the most important of these submodels are geometric, weight, aerodynamic models, models of flight dynamics, power unit, layout and alignment, efficiency, and economic models [14]. Note that the listed models relate only to the functional aspect; in the tasks of resource (strength), structural, and technological design, the corresponding submodels are added to the general list.…”

“…However, dividing the description of a complex object into particular models and corresponding groups of tasks significantly simplifies the modeling process within each aspect, while significantly complicating the procedures for corroborating particular design solutions obtained within this framework. Decomposition of a technical system reduces the explicit complexity, but increases the so-called implicit complexity associated with the difficulties in determining the expected properties of the system by the characteristics of its elements, which is a manifestation of the emergence property of complex systems [14].…”

“…One of the modern trends in the development of CAD is exactly the desire of developers to build systems of interconnected models that characterize various aspects of describing the design object. An example of such an approach is [14], where the modules of weight design, aerodynamic, and strength calculations were combined. This area also includes the work of a number of foreign research groups, particularly the Delft Technical University (The Netherlands), where the knowledge-oriented multi-model generator (MMG) system was created, the diagram of which is shown in Figure 14.…”