Категория: 05.00.00 — Techincal Sciences

Modified methodology for confirming ADS-B data with correction of temperature values when estimating the flight altitude

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DOI 10.51955/2312-1327_2023_4_28

Andrey S. Kalintsev

Abstract. The International Civil Aviation Organization indicates the need to confirm the ADS-B data. The ADS-B messages include information about the horizontal and vertical location. Information about the altitude of an aircraft in civil aviation is of great importance. The article proposes a modified methodology for confirming ADS-B data when performing flights on local airlines, which allows us to estimate and compare the geometric and barometric altitude of aircraft flight transmitted in a standard ADS-B message. The proposed modification of the method consists is correcting the temperature values, using the full barometric Laplace formula, taking into account the ADS-B quality parameters. In a level flight, with no ground velocity vector data, temperature is corrected using the airspeeds (TAS, IAS) transmitted in the ADS-B message. The method uses a maximum permissible error of 90 m. It is also proposed to determine the air temperature according to geometric and barometric altitude data transmitted in the standard ADS-B message. The determination of air temperature at altitudes involves the use of the ADS-B data from the aircraft that completed take-off. To determine the temperature according to the data of the aircraft completed landing, statistics of data from several aircraft is needed.

Key words: flight safety, ADS-B, temperature, barometric altitude, geometric altitude, TAS, IAS.

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Influence of individual circadian rhythms on maintenance staff fatigue

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DOI 10.51955/2312-1327_2023_4_20

Alexandra L. Rybalkina

Abstract. The paper presents the results of a study of individual circadian rhythms and age influence on maintenance staff fatigue. Fatigue indicators were assessed using seven indicators for four types of shifts: day shift, night shift, daily shift, five-day work week. Changes in the values of maintenance staff fatigue indicators were analyzed for each type of work shift, depending on the type of individual circadian rhythms (larks, owls, pigeons) and depending on age (20-29, 30-39, 40-49 and 50-59 years old). The data obtained show that the age and individual circadian rhythms influence the civil aviation maintenance staff fatigue.

Keywords: individual circadian rhythms, fatigue, maintenance staff, human factor, questionnaires.

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Supplier selection and evaluation methods based on categorization of product and component parameters

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DOI 10.51955/2312-1327_2023_4_6

Nikolai S. Khersonsky

Ludmila G. Bolshedvorskaya

Abstract. The risk of release of non-conforming products may arise under the influence of various factors. The results of earlier studies showed that the most significant factors that reduce the quality of products include a decrease in the efficiency of equipment, the level of professional competence of performers, the reliability of partners and suppliers of raw materials, materials, components. This work is devoted to the development of a mechanism for choosing a reliable supplier.

Keywords: product safety and operability, categorization of controlled parameters, selection and evaluation of suppliers, cost reduction.

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Probabilistic description of wind gusts in the runway area affecting the safety of aircraft flights

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DOI 10.51955/2312-1327_2023_3_22

Elena I. Trusova

Vitalii D. Rubtsov

Alexandra L. Rybalkina

Abstract. The influence of wind gusts on the safety of aircraft flights is described. The impulse nature of wind gusts is substantiated. Experimental studies of wind gusts carried out with the help of a parametric recording device on an ultrasonic beam and an anemometer are analyzed, and it is shown that wind gusts have an impulsive nature, similar to atmospheric noise envelope emissions. The results of the analytical description of the probabilistic characteristics of atmospheric noise envelope emissions known from the literature are applied to wind gusts on the runway. Characteristics are given for the average duration of wind gusts, intervals between wind gusts and the average duration of intervals, the distribution of the duration of wind gusts, the average number and distribution of maxima of wind gusts.

Keywords: gusts of wind, probabilistic description, flight safety, aircraft, logarithmically normal model.

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Determination of the necessary quantity of spare parts to maintain the performance of devices

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DOI 10.51955/2312-1327_2023_3_6

Nikolai S. Khersonsky

Ludmila G. Bolshedvorskaya 

Abstract. The paper is a logical continuation of a series of publications devoted to solving problems aimed at managing the process of assessing the production of non-conforming products through the use of statistical methods. This paper presents mathematical models for determining the required quantity of spare parts for devices consisting of a large number of identical units and assessing the dependence of the quantity of spare units on the number of operating devices and repair teams servicing them. The developed mathematical models are universal and can be used for any industry: aviation, atomic, chemical industry, etc.

Key words: mathematical model, queuing systems, devices, failure rate, mean time to failure, spare parts, units, repair team.

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Automation of additive processing methods in the production of products made of photopolymer materials

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DOI 10.51955/2312-1327_2023_3_68

Nikolai G. Filippenko

Alexandr V. Livshits

Tamara T. Chumbadze

Abstract. The use of new modern structural materials that would improve the physical and mechanical properties of products, assemblies and components of machine and transport engineering would reduce the mass fraction of metals in their design, which is a very urgent task. The purpose of this study was to develop an algorithmic solution for the automated control of the technology for manufacturing products from photopolymers based on the found scientifically based set of controlled parameters obtained in the process of studying the physical and mechanical characteristics and chemical properties of composites.

The experimental and industrial tests of the physical and mechanical properties of resin ROEHM R-50 made it possible to investigate the operation of the photopolymerization control system algorithm in practice.

Keywords: photopolymer, additive technologies, automation, controlled parameters

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Increasing airfield capacity with the integrated aircraft arrival/departure manager (AMAN/DMAN)

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DOI 10.51955/2312-1327_2023_3_30

Alexander Yu. Knyazhsky

Alexander P. Plyasovskih

Alexander V. Tarasenko

Abstract. The article proposes a method for increasing the capacity of an aerodrome and reducing the average delay of arriving / departing aircraft by optimizing the queue of them, taking into account the specified minimum allowable time intervals between aircraft, depending on their weight categories of movement stages (take-off landing). An analysis of the effectiveness of this method was carried out, for the evaluation of which a stream of events (departures and arrivals) with a Poisson distribution was used. The dependences of the average delays of departures and arrivals on the flow intensity of departures and arrivals are estimated as well as the potential for increasing the aerodrome capacity by this method. The effectiveness of the departure control system was compared in terms of absolute priority for arriving aircraft and in terms of the equal priority for arriving and departing aircraft. It is shown that an integrated arrival/departure manager with the equal priority for departing and arriving aircraft is more efficient than with absolute priority for arriving aircraft.

Key words: AMAN, DMAN, air traffic control, departures, arrivals, ATC AS, capacity.

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The research of the immunity of the multisystem GNSS reciever

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DOI 10.51955/2312-1327_2023_2_28

Roman O. Arefyev

Oleg N. Skrypnik

Muslim A. Mezhetov

Abstract. The article presents the results of a study of the noise immunity of the ATGM336H multi-system GNSS receiver to the influence of narrow-band interference at the L1 frequency set for one of the systems (GLONASS or GPS). The review of existing works on the study of noise immunity of satellite navigation receivers is carried out. The method of conducting experiments is presented. The simulator CH-3803M was used as a signal source from navigation satellites. The analysis of the results obtained during the experiments for the formulation of narrow-band interference of various capacities via GPS and GLONASS channels is carried out.

Keywords: GPS, GLONASS, dilution of precision, immunity.

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Analysis of the de-icing procedures effect on the flight safety level in the operation of a long-haul passenger airplane

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DOI 10.51955/2312-1327_2023_2_15

Sergey V. Skorobogatov

Abstract. The purpose of this article is to investigate the barrier ice accretion after aircraft de-icing, as well as to analyze the impact of it on flight safety. The influence degree of the flight speed factor, the factor of the ice ridges location relative to the aircraft Pitot tubes on the airflow disturbance creation and the total pressure indicators pulsations is studied. It was analyzed the aviation accidents related to the aircraft icing process. A detailed study of the incident caused by the barrier ice in the fuselage nose section was performed; weather conditions and de-icing procedure by the ground personnel were analyzed. It has been presented a picture of the turbulent flow pulsations behind the ice ridges, making it possible to determine the flight conditions when the crew may receive unreliable information about the airspeed being an important parameter necessary for the autopilot normal operation.

Keywords: icing, de-icing, flight safety, ice ridges, Reynolds averaged Navier-Stokes equations.

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Assessment of equipment performability depending on the manifestation of random and non-random factors

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DOI 10.51955/2312-1327_2023_2_6

Nikolai S. Khersonsky

Ludmila G. Bolshedvorskaya

Abstract. The main motive for conducting the study was the need to consider in detail the change in equipment performability depending on the manifestation of random and non-random factors. The results obtained will make it possible to solve particular problems conditioned by the need to assess the survivability of equipment, the likelihood of its service life or radical replacement.

Key words: simulation, survivability, equipment performability, equipment replacement

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