Категория: 2.9. Transport systems

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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Methodology and software for modeling the functioning of systems taking into account the characteristics of their reliability at the stages of operation and design

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DOI 10.51955/2312-1327_2023_1_57

Sergey M. Krivel

Anastasia A. Lebedeva

Alexandra B. Spasibko

Abstract. The work is devoted to the creation of universal software for the development of computer models of systems that allow studying the parameters and characteristics of the reliability of systems based on the structural scheme of reliability, and the methodological principles of using the proposed software in the analysis of the operational properties of systems in their design. The software is an application (Toolbox) of the Simulink dynamic modeling system. Algorithms and programs are unified, grouped by purpose, designed to form mathematical and computer models of complex structural reliability systems. The proposed software allows performing a computational experiment to analyze reliability characteristics and to evaluate the effectiveness of measures to improve the reliability of technical and technological systems; it is enough to simply modify mathematical models; organize a software interface; process simulation results. The features of the software make it possible to effectively change both the characteristics and reliability parameters of the system elements and the structure of the interrelationships of the system elements from the point of view of the reliability of the entire system as a whole. The paper provides an example of using the software.

Keywords: SIMULINK, MATLAB, reliability, methods for calculating reliability parameters, reliability block diagrams, reliability of technical systems, reliability of technological systems, reliability of machines.

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Analytical study of the ionosphere influence on energy relations in satellite communication systems by the methods of physical plasma kinetics

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DOI 10.51955/2312-1327_2023_1_98

Dmitry Vladimirovich Khazanov

Boris Valentinovich Lezhankin

Vyacheslav Vladimirovich Erokhin

Abstract. In civil aviation, an urgent and important task is to provide air traffic participants with uninterrupted radio communication. Satellite communication is a global mobile network covering the entire surface of the Earth, including polar regions, which provides a two-way data and voice communication exchange. An analysis of the principles of functioning of satellite communication systems (SCS) showed that the determination of energy characteristics is of great importance. Energy characteristics in satellite communication channels and the level of interference determine SCS operational capabilities and quality indicators. One of the critical factors that determine the effectiveness of the SCS functioning is the conditions for the propagation and absorption of radio waves, including ionospheric phenomena, which are not yet fully understood, and this determines the research relevance.

This article is devoted to theoretical studies of the ionospheric plasma by the methods of physical kinetics to increase the energy potential of the radio links of a satellite communication system.

Keywords: physical plasma kinetics, energy relations, satellite communication systems, Maxwell distribution function, ionospheric phenomena.

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Selection and justification of methods and mathematical models of equipment wear and replacement

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DOI 10.51955/2312-1327_2023_1_27

Nikolai S. Khersonsky

Ludmila G. Bolshedvorskaya

Abstract. The authors develop and show the practical applicability of mathematical models for assessing the wear of equipment. According to the property of fixed assets, which equipment belongs to, it has to be replaced as a result of wear and tear. In this connection, the relevance of the conducted research is caused by the search of models for assessing their state at a given moment of time. The complexity of developing such models is due to the fact that the characteristics of equipment performance are random values and random functions. When planning the work of the enterprise it is necessary to take into account the statistical characteristics of the survivability of the equipment. Only in this way it is possible to foresee in advance the amount of renewable equipment, the order of preventive maintenance and the terms in which equipment should be replaced to ensure uninterrupted implementation of the production program without excessive investment expenditures of the enterprise.

Key words:  mathematical models, wear and replacement of equipment, optimization.

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Selection and substantiation of parameters and performance indicators of the in- service inspection system of onboard aircraft equipment units

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DOI 10.51955/2312-1327_2022_4_70

Sergey V. Kuznetsov

Abstract. The in-service inspection (ISI) system of onboard equipment of civil aircraft provides management of technical operation processes. Its quality is manifested in the process of in-service inspection. The ISI involves determining the technical state of monitor objects at various stages of operation: in flight, during operational maintenance (pre-flight and post-flight check), during periodic maintenance, after removing the equipment from the aircraft. The analysis of the problem of forming and improving the ISI system for onboard equipment shows its complexity requiring a systematic approach based on the appropriate mathematical apparatus. The ISI is characterized by the inspection accuracy, i.e. a property of technical state inspection which determines the degree of display objectivity as a result of monitoring the actual technical state of a monitor object. As quantitative parameters and performance indicators of the ISI system for onboard equipment, the characteristics of the inspection accuracy serve. To determine them, rational sets of technical states and decisions about the technical states of onboard units were formed. Based on belonging to these sets, three groups of the inspection accuracy characteristics were identified. The first group consists of conditional probabilities of transitions in the in-service inspection for various types of control. The second group consists of unconditional probabilities of transitions in the in-service inspection for various types of control. The third group consists of a posteriori decision-making probabilities in the process of in-service inspection for various types of control. Analytical dependencies for calculating the inspection accuracy characteristics of the three groups for onboard units and the relationship between them were determined.

Key words: in-service inspection system, technical operation process, technical state, inspection accuracy, onboard equipment.

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On improving the efficiency of the training of engineering and technical personnel of radio equipment and radio communication services based on the method of computer emulation of radio equipment

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DOI 10.51955/2312-1327_2022_4_56

Stepan V. Shalupin

Eduard A. Bolelov

Vyacheslav V. Erokhin

Abstract. The quality of operation of objects of radio technical support for flights largely determines both their capabilities for air navigation support and the safety of flights of civil aviation aircraft. In turn, the quality of the work performed for the maintenance of facilities is determined by the level of professional training of the engineering and technical personnel of the services for the operation of radio technical flight support. The analysis of the personnel training system has shown that the forms of training have not changed much and still include lectures, group and practical classes, and exercises at real objects of radio technical support for flights. The methodological support of the implemented forms of training conducted in the training units is visual materials in the form of posters, dummies, interactive tools and layouts that do not provide dynamic filling of the studied methods of functioning and maintenance and repair of specific types of equipment. At the same time, for the personnel of the operation services, the skills and abilities of monitoring the technical condition and modes of operation of the objects of radio technical support for flights, diagnosing failures and technologies for carrying out maintenance work are especially important.

Radical changes in the system of training workers and increasing the effectiveness of this training can be achieved with the introduction of computer simulators based on the method of equipment emulation.

This article is devoted to the analysis of the training system for engineering and technical personnel of the services for the operation of radio equipment and communication facilities, the disclosure of its shortcomings and the consideration of the method of computer emulation of objects of radio technical support for flights, as the basis for building simulator systems.

Keywords: radio engineering support of flights, maintenance, engineering and technical personnel, advanced training, emulation, computer simulator.

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