UDC 656.073 BBK 39.28

Ilesaliyev D. I.

The author researches numerous variants of cargo rack storage on the pallets with dimensions of 1,200×800 mm taking into consideration filling the storage area by length, width and height for different parameters of cargo. The patterns of changing the storage area capacity are revealed. To estimate the capacity of an indoor warehouse for piece goods, a parameters series was developed.

Keywords: piece goods, unit load, warehouse, shelving, storage area.

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UDC 629.42:629.4.054, 625.28 BBK 39.232

Ablyalimov O. S.

The article presents the research results of analysis and estimate of transportation efficiency of 3VL80^S mainline (train) three-section electric locomotives on the hilly and mountainous section Marokand-Navoi of JSC “Uzbekiston temir yullari” with non-stop and stop-and-go freight traffic at passing tracks, intermediate stations and intersections. The values of kinematic and energy parameters of the key figures of 3VL80^S electric locomotives allow the locomotive complex specialists to elaborate recommendations for increasing  the efficiency of rail transport in real conditions of operating a tractive electric stock on hilly and mountainous railway sections.

Keywords: research, a result, a freight train, motion,  an electric locomotive, a railway track, operation, conditions, direction, speed, a rolling stock, analysis, hilly and mountainous, estimate, a station, to present, a point, average, quality, a station-to-station block, profile.

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UDC 629.42:629.4.054, 625.28 BBK 39.232

Ablyalimov O. S.

The article presents the results of validation of operating parameters of 3VL80S mainline (train) three-section electric locomotives on a real hilly and mountainous 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 (properties) of the track profile for this section. Criteria for the estimation are the adjusted values of overall and specific power consumption for hauling operation numerically and in terms of money with account taken of the values of equated time of train travel in traction mode and of the specific power consumption per trip. The research results were received using the methods and techniques of the locomotive-traction theory with account of basic indicators of the traction-energy efficiency of 3VL80^S use in the form of tabular data and curves. The research results are recommended for practical use by engine-drivers, termotechnic instructors and experts of linear enterprises of the Uzbek railway locomotive complex who deal with issues of energetics of freight and passenger trains movement on the real hilly and mountainous and identical virtual railway sections.

Keywords: research, result, a freight train, movement, an electric locomotive, a railway track, a section, a method,  exploitation, condition, direction, a stage, speed, calculation, rolling – stock, analysis, hilly and mountainous, point, divide, average, dependence, substantiation, quality, a block, profile, railway.

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UDC 621.391:621.396 BBK 39.57-5

Skrypnik O. N.

Main types of coordinate systems used for solving air navigation tasks that are connected with the provision of aeronautical flight control and landing are examined in the article. The main requirements for coordinate systems are given.

Local (orthogonal, cylindrical and spherical) coordinate systems were studied, their advantages and disadvantages as well as areas of their application were highlighted. Direct and backward coordinate transformations between the local coordinate systems were shown.

The author shows distinctive features of global coordinate systems application which are connected with choosing the Earth’s figure model and its mathematical description problems. Basic information about the global terrestrial ellipsoids and their parameters is presented. The need to shift to the global terrestrial ellipsoid and global reference systems is demonstrated. Basic information about the ITRS and ITRF is given. Differences in determining an object’s space coordinates in these reference systems are described. Differences in the areas of application of PZ-90 and SK-2011systems as well as their prototypes WGS-84 and NAD-83 are specified.

The author considers peculiarities of global geodesic and geospheric (great-circle) coordinate systems, their advantages and disadvantages. Direct and backward coordinate transitions for global coordinate systems as well as expressions that link geocentric and topocentric coordinate systems are illustrated.

Key words: coordinate system, geoid, global terrestrial ellipsoid, coordinate transformations, a local coordinate system, a geodetic coordinate system, air navigation.

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UDC 004.588 BBK 74.5

Chokoj V. Z.

Aircraft maintenance procedures imply doing different work of logistic, organizational and technical and technological character. Their common issues are those of surveillance objects and processes for the purpose of numerical data collection, processing and exploratory data analysis before using for taking decisions. The urgent issues of mathematical and instrumental support for processing and exploratory data analysis within the operating company and under teaching in educational establishments of civil aviation are discussed in this regard.

Key words: sample, binary sequence, data processing, filtering, exploratory analysis, stationarity of sample values, outlier analysis, statistical criteria.

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UDC 629.42:629.4.054, 625.28 BBK 39.235

Ablyalimov O. S.

The article presents the results of studies of the analysis and justification of efficiency of use of the main (train) three-unit diesels UzTE16М3 on the hilly-mountain area of Marokand – Navoi of the Uzbek Railways in the movement of freight trains with stops and without them at thestations en route, siding lines and separate stations. The obtained parameter values of the main indicators of the transport operation of the tested locomotives UzТЕ16М3 will be quite helpful for engine driver-instructors and specialists of the shop operation of the locomotive depot Samarkand, Bukhara in estimating the traction properties of track sides of a path profile and effectiveness of the operational activities of the mentioned real railway part of the JSC “Uzbekiston Temir Yullari”.

Keywords: research, result, freight train, movement, locomotive, railroad, track section, operation, condition, direction, speed, rolling stock, analysis, hilly and mountainous, estimation, station, submit, average, track side, profile.

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