Категория: 2.9. Transport systems

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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Assessment of adverse conditions for helicopter pilotage

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DOI 10.51955/2312-1327_2023_1_42

Elena I. Trusova

Alexandra L. Rybalkina

Nikolay I. Nikolaykin

Abstract. The results of the analysis of negative aviation events caused by difficult weather conditions are presented; it is statistically confirmed that this predominantly occurs with helicopters. The influence of environmental factors on the piloting of aircraft is overviewed, the mechanism of such influence is explained; an analysis of earlier studies is given. The possibility to reduce the piloting risks by preliminary assessment of the adverse weather risks is shown. For the planned helicopter flights, a method of preliminary compensation of environmental influence is proposed.

Keywords: weather conditions, risk assessment methodology, flight safety, helicopter.

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Confirmation of ADS-B messages by aircraft flight altitude

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DOI 10.51955/2312-1327_2023_1_118

Alexander P. Plyasovskih

Evgeny A. Rubtsov

Andrey S. Kalintsev

Vladislav Y. Davidenko

Abstract. Proposed the method for confirming ADS-B data based on the analysis of information about the aircraft altitude and atmospheric parameters. To confirm the reliability of ADS-B messages, proposed to compare the geometric height obtained from satellite navigation system data with the height calculated for the real atmosphere (based on information from the meteorological service on pressure and temperature). To implement the proposed methodology, required the following input data: pressure at the level of the weather station, temperature at the level of the weather station and at flight altitudes, and data on geometric and barometric altitudes transmitted in the ADS message. It has been established that the greatest error in the calculations is introduced by the temperature at the aircraft flight altitude. In order to reduce the influence of errors in determining the temperature, proposed to use data from weather balloons. With developed methodology, a calculation was performed using real altitude data transmitted in the ADS-B message and the required data from the meteorological service. Messages received from the ADS-B ground station NS-1A manufactured by JSC VNIIRA, which is installed at the Mezen airfield, were used. The developed methodology is proposed to be used to confirm ADS-B data at regional aerodromes with low flight intensity.

Key words: ADS-B, weather balloon, barometric altitude, geometric altitude, pressure, temperature, Laplace formula, ISA.

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The experience of technical operation of air data inertial reference system of A-320 aircraft

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DOI 10.51955/2312-1327_2023_1_134

Alexander L. Kivokurtsev

Oleg A. Sokolov

Alexander Yu. Yurin

Abstract. The article presents the experience of technical operation of the air data inertial reference system (ADIRS) both on real aircraft in airlines and on a procedure trainer during the “Simulator training” practice at a university. The features of the ADIRS construction are considered, its central role as the main source of flight and navigation information in the composition of the integrated onboard complex is shown. The main method of technical operation of the system under consideration is “on-condition” operation, i.e. operation until a dangerous failure occurs that can affect flight safety.

Through full-scale experiments based on the analysis of the system performance in real conditions typical failures are shown, emergency situations and possibility of system reconfiguration are considered. In the presence of a procedure trainer it is possible through experiments to study the features of the system operation, to develop a methodology for identifying and eliminating some failures.

The article proposes to use a continuous training system, consisting of three stages, when training aviation specialists. The first stage is a discussion of the construction features, the experience of technical operation of the systems under study at a local scientific and practical conference. The second is performing practical tasks for the systems under study on a procedure trainer. The third is conducting the technical operation work on the real aircraft systems.

Keywords: Air Data Inertial Reference System (ADIRS), Air Data Reference (ADR), Inertial Reference (IR), strapdown inertial navigation system (SINS), technical operation experience, “on-condition” technical operation, aviation specialists’ training, continuous training system.

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Use of LoRa modulation in radio communication, navigation and surveillance aids for performing air traffic control tasks

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DOI 10.51955/2312-1327_2023_1_77

Muslim A. Mezhetov

Boris V. Lezhankin

Anna I. Tikhova

Ulyana S. Vakhrusheva 

Abstract. The paper considers the use of LoRa technology in the data transfer system for performing aircraft position-fixing by means of the network of multilateration ground stations. The urgency of the problem is that the methods used for transferring data do not meet the requirements for safety and security of the transmitted information so such systems are not protected against unauthorized access. The information transmitted is strategically important for performing air traffic management tasks on the territory of the Russian Federation. Unauthorized access can result in intercepting and spoofing the coordinate information of aircraft location. This is possible only in exceptional circumstances which lead to reduction in flight safety and transition of flight incidents to flight accidents. The security of transmitted information can be improved by applying noise-like signals which ensure better security indexes of transmitted signals and possess higher jamming resistance. A new LoRa technology of transferring data is widespread nowadays. The technology is based on the linear frequency modulation which has been used in radar systems for several decades.  The paper presents the algorithm of operating the multilateration data transfer system and its hardware-in-the-loop simulation implemented as a virtual device.

Key words: Linear frequency modulation, multilateration surveillance system, LoRa technology.

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