ΠšΠ°Ρ‚Π΅Π³ΠΎΡ€ΠΈΡ: 2.9. Transport systems

Algorithm of applicability of statistical methods for control, regulation and prediction of output parameters of products

DOI 10.51955/2312-1327_2022_4_6

Nikolai S. Khersonsky

Ludmila G. Bolshedvorskaya

Abstract. Logically, the article is a continuation of an earlier study devoted to determining the practical applicability of statistical methods for assessing the compliance of manufactured products with the requirements of regulatory documentation and reflects their application depending on the stages of the product life cycle. The results obtained suggest that the application of this method in various industries (aviation, mechanical engineering, shipbuilding, defense, etc.) will significantly improve the quality of finished products, as well as guarantee the operational performance of components manufactured by domestic manufacturers in the format of solving the problem of import substitution.

Key words: flight safety, import substitution, products, quality of finished products and components, non-conforming products.

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Parametric analysis of aerodynamic characteristics of the wig layout tandem schemes

DOI 10.51955/2312-1327_2022_4_30

Sergey M. Krivel

Egor A. Galushko

Yuri F. Vshivkov

Abstract. The work is devoted to the study of aerodynamic characteristics of the WIG original layout and the assessment of influence of its geometric parameters on the aerodynamic characteristics. A brief overview of the history of synthesis of the investigated WIG scheme is presented. The aerodynamic layout is made according to the “tandem” scheme of two wings and a high-mounted stabilizer. The influence of kinematic flight parameters (angle of attack and distance to the underlying surface), deflection angles of aerodynamic surfaces (flaps and steering surfaces), the relative position of the wings, the presence and parameters of end washers and winglets on the WIG aerodynamic characteristics is investigated. The results of the work allow us to conclude that the deflection angles of aerodynamic surfaces have a significant effect on the values of aerodynamic coefficients and the value of aerodynamic quality. These effects can be used to control the WIG, improve or provide a number of flight characteristics. The most preferred parameters of the aerodynamic layout are evaluated in terms of ensuring the highest aerodynamic quality. A number of defining features of the flow around the proposed WIG scheme and its elements are identified and demonstrated in the work. The potential positive properties of the layout are highlighted, which can significantly affect the feasibility and effectiveness of the WIG as a design object.

Keywords: ekranoplan, aerodynamic ground-effect craft, aerodynamic characteristics, aerodynamic layout, layout parameters of the WIG, GEV (ground-effect vehicle), WIG (wing-in-ground-effect).

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The theorem of gaseous and liquid media vortex formation

DOI 10.51955/2312-1327_2022_3_47

Nikolay V. Danilenko

Anton G. Kirenchev

Abstract. The object of research is vortex formation of gas (liquid) media. The state of the vortex formation issue is determined. The theoretical substantiation of the vortex formation problem is given. The kinematic essence of the gas-dynamic phenomenon of vortex formation is established. Its contradictions are revealed. The working process of vortex formation is established. Efficiency parameters and operating parameters are obtained. The place of vortex formation in the equation of conservation of the energy of gas motion is indicated. A set of factors for the generation of vortex activity of natural and man-made vortex formation has been established. A theorem on vortex formation is proposed. Its consequences and areas of practical application are outlined.

Keywords: vortex formation of gas (liquid) media, factors of generation and activation of vortex formation, workflow of gas (liquid) media, definition of vortex formation, vortex formation theorem, classification of vortex formation.

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Control of evaluating non-conforming products based on statistical methods

DOI 10.51955/2312-1327_2022_3_33

Nikolai S. Khersonsky

Ludmila G. Bolshedvorskaya

Abstract. The purpose of this work is to determine the practical applicability of statistical methods for assessing the compliance of manufactured products with the requirements of regulatory documentation and substantiating the feasibility of strategic planning of their production range. The advantage of this study is the development of a universal algorithm for the system of applying statistical methods to control nonconforming products and reduce the number of defects caused by known and little-known causes. The reliability of the conclusions obtained is due to the results of experiments carried out as part of the technological process, the objects of which were cylindrical parts made by pressing from materials of various physical and chemical composition used in various industries: aviation, mechanical engineering, shipbuilding, defense, etc.Β 

Key words: statistical methods, quality of components, nonconforming products, requirements of regulatory documentation, flight safety.

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Logic-probabilistic modeling of hazardous situations in the investigation of aviation events

DOI 10.51955/2312-1327_2022_3_6

Anatoly G. Guziy

Dmitry A. Shiryaev

Abstract. The article presents an original formalizable logical-probabilistic model for the development of hazardous situations in flight, the use of which contributes to the deepening of the analysis of flight safety as a state of the air transport system, covering all its components and interfaces directly or indirectly involved, the current state of which determines the risk of an accident in each specific flight.

It is shown that the effectiveness of measures to reduce the risk of aviation accidents (prevention of aviation events) within the framework of the civil aircraft flight safety management system is largely determined by the level of organization, depth and quality of the investigation of aviation events.

The developed model is essential for organizing the collection of data and recording the results of aviation events investigation, as well as hazard and risk factors that pose a threat to the safety of civil aircraft flights. It allows you to implement a systematic approach to the investigation of aviation accidents, aviation incidents and their prerequisites, providing coverage of all directly or indirectly involved components of the air transport system and interfaces, the current state of which determines the risk of an accident in each particular flight.

The collection and registration of the results of the investigation of aviation events, data on hazard and risk factors for flight safety within the framework of the state system for managing the safety of civil aircraft flights on the basis of the developed model contributes to the fulfillment of the requirements of international and national legislation by all participants in the flight safety management process.

Key words: flight safety, dangerous situations, hazard factors, accident prevention factors, probability of development of a dangerous flight situation, investigation of aviation events.

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Experimental test of the method for evaluating the functioning of automated systems on latest-generation aircraft

DOI 10.51955/23121327_2022_3_20

Ivan Stanislavovich Murav’ev

Abstract. Modern automated aircraft is a system with high information value of its operation parameters. The motor skill of the pilot in the flight control modes using autopilot and auto-throttle remains untapped on such types of aircraft. This leads to a lack of information about the aircraft state in flight and increases the risk of an emergency. To solve this problem, the authors developed a new method that allows pilots to evaluate the functioning of complex control systems, based on the formation of an integrated skill in combining static and dynamic parameters from various sources of information located in the cockpit. This method is based on a mathematical model for assessing the effectiveness of the operator’s activities and allows developing a methodology for training pilots to assess the functioning of automated aircraft systems and the state of the aircraft itself in flight.

The method consists in the fact that when performing a flight in the semi-automatic control mode, the pilot must partially replace the autopilot with manual piloting. By executing the commands set on the flight mode control panel, the pilot is partially dependent on the operating conditions of the automatics involved in operation. The theoretical calculation shows that the flight should be divided into specific stages, and the parameters of the information sources presented to the pilot in flight should be divided into static and dynamic ones. When training, it is necessary to stepwise increase the information load on the pilot through the static parameters of the information sources, requiring the student to withstand them by influencing the dynamic parameters. It is also necessary to gradually change the level of automation of the piloting mode.

The results of the experiment made it possible to determine that the participants of the experimental group were 24% more effective in performing the flight when moving from a flight with a high degree of automation to a flight with a minimum degree of automation. The processing of the experiment results showed that using the proposed preparation method when evaluating the functioning of automated aircraft systems provided the statistically significant efficiency.

Keywords: information, efficiency, evaluation of functioning, piloting, method, experiment.

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About the legitimacy of the technical operation process description by semi-markov models in relation to the aircraft fleet

DOI 10.51955/23121327_2022_2_34

Sergey S. Trishin

Evgeniya A. Achkasova

Oksana G. Boiko

Galina A. Isheeva

Abstract. The authors studied the time the Mi-8T Mi8-MTV aircraft spent in the states of technical operation. The statistical data of the operating airline of JSC “Norilsk Avia” were used. Statistical distribution laws are formalized for each time series of variations. The conformity of the theoretical and obtained statistical laws of time distribution according to the Pearson criterion has been verified. It is confirmed that the process of technical operation of aircraft in practical tasks can be considered as a semi-Markov one.

Keywords: semi-Markov process, time spent in the process state, statistical data processing, exponential distribution, technical operation of aircraft, integral distribution function.

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Principles of integration of management systems and safety management systems

DOI 10.51955/23121327_2022_2_6

Nikolai S. Khersonsky

Lyudmila G. Bolshedvorskaya

Abstract. The complication of aircraft maintenance processes in the aerodrome area under the influence of extreme, and often uncontrolled use of unmanned aerial vehicles, jeopardizes aircraft (AC) flight safety, entailing consequences from acts of unlawful interference and terrorist threats, danger to life and public health, environmental changes. This is the purpose of the study, which resulted in a new mechanism for ensuring safety through the development of a management systems integration model (IMS) and a flight safety management system (SMS). Particular attention is paid to the issue of introducing electronic IMS models in combination with SMS, the development of which is built taking into account the requirements of the management system and modern IT technologies that ensure the interconnection of the main, supporting processes and management processes, indicators of management processes, flight safety and parameters of the main business processes with the business characteristics of the aerodrome.

Keywords: Risks, quality, flight safety, integration, integrated management system, Bayesian trust networks, Petri nets.

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Automated device for determining the changes in phase and state of polymer materials

DOI 10.51955/23121327_2022_2_19

Nikolai G. Filippenko

Denis V. Bakanin

Vladimir S. Bychkovsky

Abstract. This paper is devoted to the development of a control system for the study of thermophysical properties and phase transformations in polymer and composite materials. The use of polymeric materials instead of non-ferrous and stainless metals is a necessary and promising process in the production and repair of units and mechanisms of aircraft. This trend has received particular development in recent decades, not only in aviation, but also in the entire transport engineering. Replacing metals with plastics and composites based on them reduces the main indicator in the products of this industry, namely its weight. Often, when designing and operating aircraft, it becomes simply impossible to manufacture competitive products without the use of polymers and composites in their design. The strength properties of polymers in a number of aircraft designs are compensated by the resources of their use, which are not always measured by significant time resources. Nevertheless, despite the unique capabilities of new structural polymers, the issue of changing their electro-physic-chemical properties in the process of exposure to temperature loads and other external factors during operation remains open. The algorithm of automated control and monitoring of the experimental study of the process of high-frequency electrothermy presented by the authors makes it possible to obtain more objective data on the results of the studies. The implemented algorithm of the automated control system, in the form of a software package, made it possible to obtain new and clarify the existing results of previously conducted experiments in relation to structural materials used in the manufacture and repair of aircraft and other vehicles.

Key words: transport, polymeric materials, composites, thermophysical properties, automated control system for scientific research, phase transformations.

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Experimental study of the distribution laws of output signals of microelectromechanical navigation sensors of an unmanned aerial vehicle

DOI 10.51955/23121327_2022_1_101

Andrei A. Sanko

Aliaksey A. Sheynikov

Gafur Sh. Tuganov

Abstract. The article presents the results of studies of distribution laws of output signals of microelectromechanical sensors used for platformless inertial navigation systems (INS) installed on lightweight unmanned aerial vehicles (UAV). As object of study, the GY-91 sensor was used which is made with the use of microelectromechanical technology and has an inertial measuring unit consisting of three elements located orthogonally: a turn meter, an accelerometer, a magnetometer and a single-channel barometer. Formulas for approximating the mean square deviations of overload, pitch angle and angular velocity indications for various test conditions are given. It is recommended to use the obtained dependences when calibrating accelerometers and angular velocity sensors. Recommendations on the use of different filtering methods depending on the distribution laws of the output parameters of the sensor are given. Various filters used for platformless INS sensors, such as the Kalman filter, the median filter, the AB filter and the complementary filter, are considered. A comparative analysis of algorithms for filtering the output signals of microelectromechanical sensors according to the value of signal-to-noise ratio for an aircraft-type UAV at different propeller speeds was performed. Recommendations are given on the use of the obtained research results for the algorithmic support of lightweight UAV navigation systems.

Key words: sensors, gyroscope, accelerometer, errors, distribution law.

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