Paliy O. The designing of aerodynamic deorbiting systems for space technology objects from low Earth orbits.

The object of the study is aerodynamic systems for deorbiting (ASD) of objects of space technology from low near-Earth orbits. The purpose of the study is the development of the theoretical basis for ensuring the possibility of deorbiting of space technology objects from low near-Earth orbits. Methods of research - hierarchical method of classification of technical systems, the method of decomposition of partial models of interconnected subsystems on the basis of their physical, mathematical and combined models, the method of allocating the main criterion for solving a multicriteria problem, the method of simulation modeling. The scientific result is the development of scientific and methodological support for the design of aerodynamic systems for the deorbiting of space technology objects from low-Earth orbits. The practical significance of the results of the work is as follows: systematized results of design studies in the field of the creation of ASD from the orbit of spacecraft of different purposes, which can be used as prototypes at the stage of sketch design; the developed method is used in the synthesis of design schemes of aerodynamic systems for the separation of spacecraft from various orbits; rational parameters of the ASD are found; new design schemes of the ASD are proposed. The scientific novelty of the results of the dissertation research is as follows: for the first time a classifier of constructive circuits of the ASD has been developed, in which all the attributes refer to the form, shaping and various modifications of the aerodynamic element, which interacts directly with the flow of a rarefied flowing atmosphere; a model of ASD is developed that differs from the ones known in that it uses the method of systematic analysis of decomposition of the system, which allows to generalize and formalize the description of the functioning of different classes of aerodynamic systems; the method of structural and parametric design of the ASD of space technology objects is developed, which is based on the synthesis of the modular structure of the system, decomposition of partial models of interconnected subsystems on the basis of their physical, mathematical and combined models; the principle of transformation of elements of a regular design of a spacecraft in the ASD was proposed for the first time, which allows, without the use of a specialized deorbiting system, to reduce the period of orbital period of a deorbiting spacecraft. The degree of implementation – in the “Yuzhnoye” State Design Office, Dnipro. The field of application – rocket and space technology.