Категория: 2.9. Transport systems

Modernization of the navigative sextant

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UDC 527 BBK 39.471-5

Babich S. I.

The article deals with the improvement of the traditional sextant to measure differences between altitudes and azimuths of two stars. It gives the advantages of modernized sextant to carry out the observation. It shows the algorithm of the direct calculation of observed coordinates based on the measured differences between altitudes and azimuths.

Keywords: modernized sextant, principle of operation, direct calculation of coordinates of observed position.

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Tools of making diagnostic decisions on aircraft equipment under uncertainty and risk

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UDC 338.45 BBK 65.9.050

Chokoj V. Z.

Currently, some Russian airlines face certain difficulties both in economics and in flight safety. This is caused by, among other things, insufficient operating reliability of aviation equipment and certain problems in issues of aircraft diagnostics. First of all this concerns the well-timed correct technical diagnosis of aircraft with short residual life as well as new types of aircraft for which airlines don’t have enough maintenance experience.

The article considers computer tools which enable to make decisions on the current technical condition of aircraft equipment taking into account actual conditions and technical policy of the airlines. The mathematical apparatus of the proposed tools is based on the sequential Wald-type analysis, Bayesian treatment, criteria of statistic decisions.

Key words: reliability, technical diagnosis, aviation equipment, sequential analysis, Bayesian treatment, statistic decisions.

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Tools of non-parametric estimate of aircraft equipment reliability with censored data

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UDC 338.45 BBK 65.9.050

Chokoj V. Z.

Economic difficulties in air transportation in Russia over the recent years as well as particular problems of flight safety require exploring and actuating latent reserves of efficiency. One of the reserves can be real control of operation reliability of aircraft and ground-based elements of air transport systems. The control proposes solving the problems one of which is correct software formation for reliability multiple-aspect estimate with incomplete censored data. The estimate involves a certain problem especially for the staff having insufficient mathematical and computer training. The article announces the packet of tool skins for non-parametric estimate of reliability by means of ECM.

Key words: reliability, reliability indices, aircraft equipment, non-parametric estimate, censored data

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The analysis of casual processes at interaction of structural elements of aviation transport system

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UDC 351.814.1 BBK 39.58

Marasanov P. O.

Nowadays an aviation transport system – a complex structural formation – is developed and operating. The level of safety of flights is a special criterion which is developed for an assessment of aviation transport system functioning. Adverse factors lead to formation and development of particular situations in the system. To assess the possible consequences a special classification of kinds (or ranks) of particular situations is developed.

Key words: aviation transport system, the level of safety of flights, airport power supply system, particular situation, probabilistic mathematical model.

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Method of reducing environmental hazards in aviation accidents

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UDC 656.7.081 BBK 39.5

Nikolajkin N. I., Starkov E. Yu., Klimov P. I.

The article considers the negative impact of a civil aircraft accident on the environment as one of the most important matters of aircraft exploitation. The authors propose to review and assess the impact on the base of the physical and chemical systems (FCS) and geotechnical systems (GTS) theories. In conclusion a methodology for reducing negative environmental impact of petroleum products spilled in an aviation accident is recommended.

Keywords: Civil Aviation; aircraft accident; environmental protection; physical and chemical systems; geotechnical systems, detoxification, carbon adsorption.

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Interchangeable parts, components and mechanisms

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UDC 004.738.5 BBK 32.973.202

Baranova V. I.

The article is devoted to the topic – interchangeability of parts, components and mechanisms in the vehicle. It provides information on interchangeable parts in tuning old cars, in cars, constructed on the same platform, information about original and non-original spare parts. The possibility of replacement parts from a domestic car is considered by the example of Ford Focus hatchback 2010.

Key words: interchangeable parts, tuning, platform, original spare parts, non-original spare parts

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An addition to the question of calculations of complicated and majority systems failure-free

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UDC 629.7/621.01 BBK 30в6

Furmanova E. A., Bojko O. G., Shajmardanov L. G.

The article proposes a methodological approach based upon the notion that at the stationary approach the probability of element failure in a workable part of the system may be defined by the total density of elements failure probability flows in the system’s part.

The purpose of the article is to compare the possibilities of traditional and proposed methods of calculating the majority and bridged systems failure-free.

The results obtained with proposed approach strictly match the systems failure conditions. The approach appropriateness is confirmed by the results of experimental research. The methods proposed in the article may be used in calculating the failure-free of the aircraft and spacecraft functional systems.

Key words: majority system, complicated system, failure probability, elements failure flow density, failure discreteness.

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The concept and the results of aerodynamic design of a wing-in-ground-effect (WIG) vehicle with a wide range of operating angles of attack

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UDC 629.7.016 BBK 39.5

Vshivkov Y. F., Galushko E. A., Krivel’ S. M.

The article presents approaches to designing a WIG vehicle with specified maneuvering characteristics and a wide operating speed range for level flight. Providing the maneuverability mounts challenges to operational range of angles of attack and lift coefficients. The aerodynamic design of a WIG vehicle meeting the requirements is proposed.

Key words: a WIG vehicle; maneuverability; a lift coefficient; aerodynamic design.

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Comprehensive reliability assessment of aerodynamic characteristics computed with ANSYS for compound objects

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UDC 629.7.016 BBK 39.5

Vshivkov Y. F., Galushko E. A., Krivel’ S. M. 

The article presents the main assessment results of calculating reliability of aerodynamic characteristics of a support system near the underlying surface. The assessment is based on comparing the calculation results with the experimental data and the results obtained by other authors using alternative methods.

Key words: aerodynamic characteristics; a WIG vehicle.

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