Категория: 2.9. Transport systems

The influence of quasi-sinusoidal inhomogenuities on the characteristics of double- and three-hop ionospheric reflections

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UDC: 621.371.33 BBK 39.57

A.I. Agaryshev

Nguyen Minh Giang

M.A. Portnov

The article presents the results of researching the influence of ionosperic inhomogenuities on the maximum observed frequency (MOF) and the angles of arriving the radiowaves reflected two and three times from the ionosphere (2F2 and 3F2 modes). The authors present the calculated МOF and angles of arrival of decameter radio waves using the method of equal MUF under conditions of quasi-sinusoidal inhomogenuities. The results of calculations are compared with the results of measurements.

Keywords: maximum usable frequency, maximum observed frequency, inhomogeneity of the electron concentration, characteristics of double- and three-hop ionospheric reflections,  the angles of arrival of 2F2, 3F2 modes.

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Analysis of the influence of aerometric instruments and pitot – static probes faults on flight safety

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UDK 629.7 BBK 39.56

A. Shomankov

The main types of failures and faults of pitot – static probes and aerometric instruments are determined and the causes of their occurrence are revealed. The results of the analysis of these faults influence on flight safety are presented.

Keywords: faults, mean flight time between failures, aviation event, difficult situation, probability of occurrence inflight abnormal circumstances, air crash, accident.

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The evaluation of transportation efficiency of the 3vl80s electric locomotives on the uzbek railway district Kattakurgan – Navoi

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UDK 629.42:629.4.054, 625.28 BBK 39.232

O.S. Ablyalimov

The author introduces the results of rationale for the transportation work parameters of three-section mainline (train) freight electric locomotives on a real Uzbek railway section with non-stop and stop-and-go freight traffic at passing tracks, intermediate stations and intersections, as well as estimation of the traction qualities and properties of the track profile in this area. The criteria for the estimation are adjusted values of overall and specific electrical energy consumption for traction power in the terms of quantity and money as well as accompanying values of adjusted time taken in traction mode and the specific electrical energy consumption for the trip. The research results were received as tabular dates and graphic arts dependences with the use of methods and techniques of locomotive traction theory and the main parameters of traction-energy efficiency of the considered electric locomotives.

The research results are recommended for practical application by engine-drivers-instructors and thermotechnics engineers as well as by other specialists of line enterprises of the locomotive complex of Uzbek railways with professional and productive activities concerning with the issues of energetics of moving the freight and passenger trains on real or virtual railway sections. 

Keywords: research, result, freight train, movement, electric locomotive, railway track, section, method, exploitation, condition, direction, stage, speed, calculation, rolling stock, analysis, hilly – mountainous, point, divide, average, dependence, rationale, quality,     station-to-station block, profile, railway

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The influence of a crew information support level on safety flights

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UDC 004.588 BBK 74.5

Karavaev Yu. A., Khodatskiy S. A.

The article formulates general approaches to the impact assessing algorithm formation of the crew information support level at the stage of landing gear failures localization on safety flights. The possibility of using these algorithms to assess the functional efficiency of the crew in the process of various aircraft systems failures compensating is shown through the specific flight incidents examples.

Keywords: safety, crew information support, failure localization, a special case.

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Geo-heliomagnetic influence on a human body and air transportation safety

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UDC 629.7;629.95; 656.085.22 BBK 39.5

Nikolaykin N. I., Pozheluyeva Z. V., Starkov E. Yu., Tsetlin V. V., Savchukov S. A.

The article analyzes statistical information on air transportation growth and the number of aviation incidents over the last 10 years against the present global challenges for development of the world civil aviation. The growth of air transportation intensity draws special attention to danger decrease by reduction of “a human factor” influence. The statistical data analysis of all Russian aircraft types showed that incidents and accidents happened more often to airplanes, including general aviation planes, aerostats, autogyros, ultralight planes. The examples of typical aviation incidents for the last decade connected with the crew’s actions are given. On materials of official investigations, their reasons are analyzed.

It is shown that flight operation safety requires the development of new methods of its assessment, formation of theoretical fundamentals of continuing airworthiness and accidents prevention. A human is the most adapting part of aviation system, but he is the most open for the external impacts that can influence his behavior.

The article describes procedure and results of the experiment in which, by means of laboratory ionomers, the change of oxidizing properties of specially prepared (cleared) water placed in a standard electrochemical cell was registered within a day. It is shown how geo-heliophysical environmental perturbations influence some water properties which are authentically registered in experimental cells. The article concludes that there is their certain influence on a person’s behavior and also on his possible behavior deviations.

Keywords: flights safety; aviation incident; human factor; heliophysical factors; geophysical factors; danger

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Features of the modern stage of airport air service development

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UDC 656.7 BBK 39.51

Shutova T. A.

The article describes the current state of the airport air service industry in Russia. The author defines the stages of the development of the airport air service market on the basis of the retrospective analysis. The article considers the main legal forms of investment attraction to the airport infrastructure public-private partnership, concession, contract lifecycle. The author shows the features of the competition among airports for the status of the hub, and among the Russian airport holdings at the modern stage of the airport business development.

Keywords: airport air service market, airport holdings, airport business, air transport hubs, networking air carriers.

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Concerning the methods of reloading breakbulk cargo on railway warehouses

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UDC 656.073 BBK 39.28

Urmanova Z. A.

The freight flow of breakbulk cargo processed at railway warehouses is analyzed. On the basis of the analysis, a simplified mathematical model is justified, in which the entire diverse range of goods is split into the following three groups of reloaded breakbulk cargo – through the main storage areas, sorting and temporary storage areas, and directly from one mode of transport to another.

Key words: warehouse; storage area; breakbulk cargo; reloading.

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Promising fasteners for aircraft structures of carbon composites

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UDC 629.7.015.4.023 BBK 39.48

Sazhin N. A., Sazhin A. N.

The authors consider benefits and drawbacks of existing (traditional) fasteners (metal rivets) for airframes built with application of carbon composites.  Schematic designs of promising patented fasteners (PCM rivets) and patented technologies of their mounting in aircraft structures, experimental full-size designs of the fasteners of polymeric composite materials (carbon composites) providing improvement of their mounting are given. 

Key words: fasteners, mounting, rivet, carbon composite, polymeric composite material, blind riveting, aircraft structures.

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Signal demodulation for the secondary radar channel of ADS–B system

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UDC 621.396.74 BBK 39.571.5

Lezhankin B. V., Mezhetov M. A., Turincev S. V.

Aircraft flight safety is largely dependent on the performance of systems having various purposes. One of the systems is ADS-B intended for air traffic management by constructing trajectories of aircraft motion with efficient use of airspace. The analysis of main methods of designing the equipment, demodulating and decoding the signals in data links is therefore a relevant objective which can increase the efficiency of air transportation at the required level of flight safety.   

Key words: ADS-B, systems of symbol synchronization, quadrature demodulator, quadrature signal, hardware-software receiver, preamble detector.

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Use of Pareto chart for developing recommendations on aircraft reliability

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UDC 629.3.083 BBK 39.0163

Barsukov A. G.

The author considers a methodology of integrated approach to the rationale and implementation of recommendations on aircraft reliability with the use of Pareto chart.

Key words: flight safety; aircraft; reliability; failure; fault; Pareto chart.

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