CONTENTS #3–4 (March – April) 2017
Experimental Research Of Aerodynamic Performance Of Airframes Of Various Versions
Of Mil-8/Mil-17 Helicopter Family (pp. 3 – 17)
B.L. Artamonov, A.V. Kuznetsov, V.A. Ivchin.
The paper describes the technology of design and manufacturing of a variable wind-tunnel model of an airframe of a single-rotor helicopter, which belongs to Mil-8/Mil-17 family. This model was created for experimental optimization of helicopter aerodynamic configuration by variation of the shape of the helicopter nose and tail parts, external fuel tanks, horizontal stabilizer, tail rotor pylon and engine air particle separators. The wind-tunnel model was designed on the basis of the virtual 3-D model of helicopter surface. This virtual 3-D surface model was created with the use of the Solid Works geometric computer simulation system. The variable wind-tunnel model was manufactured with the use of various 3-D prototyping technologies on a computer numerical control machine.
The experimental research of model aerodynamic performance was carried out in T-1 wind-tunnel of MAI for the following conditions: range of the angle of attack values from –30 to +30 degrees; range of yaw angle values from –180 to +180 degrees; different values of setting angles of horizontal stabilizer and vertical fin. The paper lists comparative aerodynamic performance of the different model configurations. The paper also adduces the assessment of the impact of the variable model parts on the aerodynamic forces and moments, which emerge and act on the helicopter airframe in different flight modes.
Keywords: aerodynamic performance; experimental research; model manufacturing technology.
Standardization And Aircraft Life-Cycle Management (pp. 18 – 25)
E.V. Sudov, A.N. Petrov, A.V. Kartashev
The article considers national standardization problems deal with the evolvement of aircraft life-cycle management. Certain deficiencies shown for the systems of standards involved in the development and operation of airplanes and helicopters as well as principles proposed for improvement of these systems. Proposals outlined aimed to eliminate shown deficiencies within the development and revision of general technic and dual-purpose standards used for complex aviation items.
Keywords: aircraft; life cycle; technology; standardization.
Target Assignment Problem for Aircrafts with Priority Targets (pp. 26 – 31)
V.I. Merkulov, A.S. Plyashechnik
This paper presents a method for solving target assignment problem for aircrafts. This method provides assigned target to each interceptor taking into account priority of targets. It also gives estimated interception trajectory under realistic limitations on interceptor abilities.
Keywords: target assignment; target priority; guidance; aircraft control.
The Moral And Legal Problems Of The Use Of Combat Drones And Finding Ways To Solve Them
(pp. 32 – 37)
A systematic analysis of "intellectual development" of combat UAVs, technical and technological limitations of their functionality was conducted, taking into account the nature of the fighting in modern wars. An attempt to assess the moral and legal issues was made that arise when choosing the level of automation for combat UAV used in actual warfare in the hypothetical compliance with international rules of war, based on the observance of the Law of Armed Conflict and Combat Interaction Rules of the Opposing Sides. Substantiates the obligatory presence of the operator in combat UAV control loop was justified, as a main focus in addressing the moral and legal problems of their operational use.
Keywords: autonomous systems; automation systems; the level of "intellectual development" system; a dual hierarchy of systems; compliance with the four principles of warfare; integration into the on-board systems of combat UAVs new weapons.
Calculation Of Cavitation-Induced Oscillation Frequencies In Pump Feed Systems (pp. 38 – 45)
The derivation of a wave equation to calculate frequencies of cavitation-induced oscillations near the stability boundary of pump feed systems is presented. The formulation of an analytical model of cavitation bubble evolution based on analysis of the thermodynamic cycle for liquid with the virial equation of state; the derivation of an equation for calculating the effective sound velocity; and calculations of self-excited oscillation frequencies are presented.
Keywords: cavitation-induced oscillations; virial equation of state; thermodynamic cycle; analytical model of cavitation bubble evolution; calculation; effective sound velocity; frequency of cavitation-induced oscillations.
Weather Flights Safety Radar For Different Climatic Areas (pp. 46 – 50)
A.A. Bezuglov, K.I. Galaeva, A.N. Detkov
The possibilities of the mobile meteorological radar complex of the near-by zone "Monocle-BZ" for the automated detection of dangerous meteorological phenomena are considered, which will improve the safety of aviation flights during take-offs and landings, primarily in the Arctic region, as well as at remote aerodromes of the Russian Federation in various climatic zones.
Keywords: unfavorable meteorological conditions; near airdrome zone; mobile meteorological radar complex; pulse-Doppler radar; sector review; 3D indication.
Correlation-Extreme Algorithm Image Processing Sequence With Tilted Shooting With Low-Flying Unmanned Aerial Vehicle (pp. 51 – 57)
S.V. Petukhov, Yu.V. Shved, V.М. Ivanyugin
The article presents an exploratory correlation-extreme heuristic matching stereo pairs of overlapping images obtained by shooting with sloping low-flying UAV. Characterized by great simplicity algorithm software implementation and may be implemented in real time. Image analysis algorithm was tested on images obtained from the board of the UAV-glider in horizontal flight and with a decrease in commission for landing. The algorithm is designed for use in the navigation system when the UAV tracking altitude.
Keywords: computer vision; image processing; matching problem; correlation-extreme al-gorithm; robots vision; autonomous navigation; unmanned aerial vehicle.
Modern Trends Of Aircraft Technical Condition Monitoring (pp. 58 – 68)
In the aviation, on basis of possibilities domestic and foreign aircraft industry and features of operating civil and military planes, it seems appropriate to considered three forms of monitoring: delivery lifecycle; unstoppable technical condition monitoring, based on traditional relationships of providers, subcontractors and airlines, operating the plants, departments and military units; after-sales service by provider or special organizations.
Keywords: aircraft; technical condition monitoring; civil and military planes; operational safety; delivery lifecycle; software; after-sales service; maintenance; self-test.
From The Boat "Volga-2" To Aerospace Systems. Problems Ekranoplane In The Russian Federation (pp. 69 – 82)
Learn about why the famous shipbuilder R.E. Alekseev began to create Le proposed apparatus and that he had to overcome on the way from the initial idea unusual camera until the last day of his life. Shows how struggled energetic and motivated scientist and organizer of the creation of aircraft in the shipyard. The author criticizes former associates R.E. Alekseev, managed to officially move the airfoil in the category of "ships that can fly".
Keywords: hydrofoils; airfoil; Interim guidance for safety; Russian Maritime register of shipping Russian river register.