Analysis of risks methodology in information systems

Lebediev, Oleh; Lebediev, Valentyn

doi:10.20998/2522-9052.2021.4.09

Cited by 2 publications

(4 citation statements)

References 3 publications

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“…The solution to this problem is possible by using the method of partial accelerations [14]. The effectiveness of the method and the measuring and registration module was proven during tests of tractors as part of tillage units [15,23].…”

Section: Discussion Of Ensuring the Maximum Traction Efficiency Of Th...mentioning

confidence: 99%

“…where η T is the traction efficiency; g -acceleration of free fall, m/s 2 ; j w -coupling weight utilization factor; V n is the rated speed of movement of the unit, m/s. Determining the mass of a tractor, an assembled agricultural machine, and its resistance force is carried out according to the techniques formulated on the basis of the method of partial accelerations [3,15,19]:…”

Section: The Study Materials and Methodsmentioning

confidence: 99%

“…Many non-OECD countries, including Ukraine, partially or fully use OECD codes for tractor testing. The Kharkiv branch of UkrNDIPVT has carried out a number of scientific studies on the evaluation of the functional qualities of tractors and their metrological support during tests [15]. At the same time, by analogy with related fields of technology, the tractor is considered as «a system with many elements, interconnected in a certain way, which form a certain integrity, unity».…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Determining conditions for providing maximum traction efficiency of tractor as part of a soil tillage unit

Lebedev,

Shuliak,

Lebedev

et al. 2024

EEJET

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This study aims to investigate the operation of a tractor as part of the tillage unit on the basis of analysis of its interaction with the supporting surface and the correlation between the mass of the tractor and tool. The classic approach to determining the efficiency factor does not take into account the extensive system of power take-off shafts and the extent of their use in combined tillage units. To solve the related problem, a mathematical apparatus was built in the study, which makes it possible to determine the rational ratio between the traction force of a tractor and the mass of the tillage unit. Underlying the methodological basis of the work is the generalization and analysis of the study of traction indicators of the tractor as part of the tillage unit. Empirical models of unit operation were constructed by employing the basic principles of the system approach and analysis of technical systems. When improving the methodology of research using the method of partial accelerations and our devised procedures, it was possible to significantly reduce the time without compromising the quality of results. The maximum traction efficiency for John Deere 8R series tractors as part of the tillage unit was determined, ηTmax=0.719, as well as the conditions for its provision. The traction efficiency for tractors with wheel formula 4K2, mass Gim=6–10 t, with power consumption from 60 % to 80 % was determined; it is 0.58–0.64. The results of the study make it possible to obtain a new solution to the scientific problem of ensuring the maximum traction efficiency of the tractor as part of the tillage unit, based on the rational ratio between the traction force of the tractor and the weight of the machine-tractor unit. The proposed system approach could be used to justify the layout of units and recommendations regarding their modes of operation in the case of instability of operating mass and traction force

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Section: Discussion Of Ensuring the Maximum Traction Efficiency Of Th...mentioning

confidence: 99%

Section: The Study Materials and Methodsmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Determining conditions for providing maximum traction efficiency of tractor as part of a soil tillage unit

Lebedev,

Shuliak,

Lebedev

et al. 2024

EEJET

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“…Paper [8] considers risk models in information systems and formulates the tasks of building selfhealing systems.…”

Section: Analysis Of Recent Research and Publicationsmentioning

confidence: 99%

Method for Determining the Rational Number of Uav Flotilla Taking Into Account the Reliability of the Aircraft

Рубан

Lebediev

2023

ITSSI

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The conducted studies showed that projects of analysis and assessment of emergencies at critical infrastructure facilities have been initiated in Ukraine and abroad. The purpose of such a system is the formation of data for the development of architecture, demonstration analytics and a prototype of decision support capabilities, taking into account the use of currently available data and analytical methodologies. Unmanned aerial vehicles (UAVs), which work with ground and air control points in emergencies, are planned as the basis for the construction of such a system. The subject of the study is methods of determining the rational number of UAV flotillas taking into account the assigned tasks and characteristics. Currently, there is no method for determining the rational number of a UAV flotilla, taking into account the reliability of the aircraft. An urgent scientific and technical task is the task of creating a rational number of the UAV flotilla, taking into account the reliability of the aircraft and the necessary quality of monitoring the situation in emergencies. The purpose of the article is to develop a method for determining the rational number of UAV flotillas taking into account the reliability of the aircraft and the necessary quality of monitoring the situation in emergencies. Research methods – provisions of risk theory, probability theory, combinatorics, mathematical apparatus of reliability theory, mathematical methods of optimization. Research results: an analysis of factors affecting the structure of the UAV grouping was carried out; the dependence of task performance on the probability of UAV failure under the influence of interfering factors was obtained; it is shown that in conditions with a low impact of interfering factors, the reliability of individual UAVs does not have a significant impact on the performance of assigned tasks. It has been established that with increasing influence of interfering factors, the probability of completing tasks depends on the reliability of the aircraft. Conclusions: The proposed method makes it possible to create a rational number of UAV flotillas taking into account the reliability of the aircraft and the necessary quality of monitoring the situation with a rational number of UAVs in emergencies.

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Analysis of risks methodology in information systems

Cited by 2 publications

References 3 publications

Determining conditions for providing maximum traction efficiency of tractor as part of a soil tillage unit

Determining conditions for providing maximum traction efficiency of tractor as part of a soil tillage unit

Method for Determining the Rational Number of Uav Flotilla Taking Into Account the Reliability of the Aircraft

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