CONTENTS #10 (October) 2022

Active Identification of Aerodynamic Characteristics: from Test Signal to Test Control (p. 3 – 11)

N.V. Grigoriev

We consider the problem of control selection for identifying aircraft aerodynamic characteristics taking into account possible errors in a priori estimates of aerodynamic characteristics, the uncertainty of the test maneuver initial conditions and constraints on the admissible disturbances of the state vector. The possibility of identification accuracy improving in comparison with the accuracy of identification on the optimal program test signal due to a selection of the aircraft control law in the test maneuver is shown.

Keywords: aerodynamic characteristics; test signal planning; parametric identification; automatic control.

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Equations of Vortex Mechanics of Near-Wall Boundary Flows of High-Speed Vehicles (p. 12 – 20)

A.G. Prudnikov, V.K. Mamaev, M.K. Aukin, V.V. Severinova

Into the development of the existing equations of vortex mechanics of a free flooded boundary layer the equations of motion of a high-speed wall-mounted vortex boundary layer are also given with the only determinant of the same known parameter – the injection velocity.

Keywords: vortex mechanics; large vortex; boundary layer; injection velocity.

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Data Markup Methodology for Compact Сlusters of Objects in Machine Learning Problems (p. 21 – 28)

V.K. Abrosimov, V.I. Nikonorov

The paper considers the problem of automating a data labeling process of the subsequent classification of compact accumulations of military equipment on the ground, detected by air reconnaissance and presented by optoelectronic information. The key idea is the possibility of systematizing the classification features that guide the data labeling operator in such situations and fixing the sequence of his decision reasoning. The methodology for recognizing a cluster class as a spatially distributed group of objects of interest has been developed.

Keywords: automation; machine learning; data labeling; classification; objects.

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Problems of Foreign Economic Activity in the Conditions of Increasing Geopolitical Acuity (p. 29 – 37)

Yu.S. Bogachev, S.R. Bekulova, P.V. Trifonov

The article deals with the problems of Russia's foreign economic activity in the context of financial and product technological restrictions on the part of NATO countries. The state and development potential of Russia's export activities are analyzed. Substantiated proposals for improving foreign economic activity in the context of expanding sanctions restrictions.

Keywords: foreign economic activity; export; import; development institutions; industry; industrial policy; import substitution.

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The Analytical Mathematical Model for Calculating the Spoke-Type Design of Six-Component Rotating Shaft Balances (p. 38 – 47)

V.S. Manvelyan

The analytical mathematical model for calculating the spoke-type design six-component RSB’s main geometrical parameters is presented. The use of this model can significantly reduce the time of design optimization when calculating by the FEM in high-level software packages that are demanding on computing power.

Keywords: rotating shaft balances; mathematical model; design optimization; analytical calculation.

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РCalculation of the Сertified Takeoff Characteristics as the Part of the Aircraft Flight Manual (p. 48 – 54)

Yu.I. Maltsev

This article describes the structure of the algorithms for calculating takeoff characteristics, satisfying the relevant aviation requirements, and in order to create the AFM-DPI software based on them. The main attention is paid to the constraints placed on the airplane’s allowable takeoff weight and the allowable assumed temperature. The calculation results are presented as functional dependencies and as web chart for illustration.

Keywords: aircraft flight manual; takeoff characteristics; allowable assumed temperature; decision speed; web chart.

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