A TECHNIQUE FOR DETERMINATION OF INFORMATIVE PARAMETERS FOR PERSONAL PREDICTION OF QUALITY AND RELIABILITY INDICATORS OF RADIO-ELECTRONIC MEANS

2017 ◽  
Author(s):  
R.O. Mishanov ◽  
◽  
M.N. Piganov ◽  
Keyword(s):  
Radio Electronic ◽  
Reliability Indicators ◽  
Informative Parameters ◽  
Quality And Reliability

scholarly journals Method of Estimating Uncertainty as a Way to Evaluate Continuity Quality of Power Supply in Hospital Devices

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 486
Author(s):  
Marek Stawowy ◽  
Adam Rosiński ◽  
Jacek Paś ◽  
Tomasz Klimczak
Keyword(s):  
Power Systems ◽  
Power Supply ◽  
Uncertainty Modeling ◽  
Supply System ◽  
Additional Advantage ◽  
Quality Models ◽  
Reliability Indicators ◽  
Electrical Devices

The article presents issues related to the determination of the continuity quality of power supply (CQoPS) for hospital electrical devices. The model describing CQoPS takes into account power redundancy. The uncertainty modeling method based on the certainty factor (CF) of the hypothesis was used to establish the single-valued CQoPS factor. CQoPS modeling takes into account multidimensional quality models and physical stages of power. The quality models take into account seven dimensions that make up CQoPS (availability, appropriate amount, power supply reliability, power quality, assurance, responsiveness, security). The model of power stages includes five of these stages (power generation, delivery to recipient, distribution by recipient, delivery to device, power-consuming device). To date, when designing hospital power systems, the applied reliability indicators revealed limitations because they do not consider all the possible factors influencing the power continuity. Estimating the supply continuity quality with the use of the uncertainty modeling proposed in this article allows for taking into account all possible factors (not just reliability factors) that may affect supply continuity. The presented modeling offers an additional advantage, namely, it allows an expanded evaluation of the hospital supply system and a description using only one indicator. This fact renders the evaluation of the supply system possible for unqualified staff. At the end of the article, some examples of calculations and simulations are presented, thus showing that the applied methods give the expected results.

scholarly journals METHODOLOGICAL APPROACH TO DETERMINATION OF THE TREND OF CHANGES IN AIRCRAFT RELIABILITY INDICATORS OF AVIATION EQUIPMENT ON THE EXAMPLE OF STATE AVIATION HELICOPTERS

2020 ◽  
pp. 42-51
Author(s):  
V. Golub ◽  
O. Bursala ◽  
V. Chupryna
Keyword(s):  
Methodological Approach ◽  
Statistical Processing ◽  
Armed Forces ◽  
Mean Value ◽  
Control Limit ◽  
Acceptable Level ◽  
Reliability Indicators ◽  
The Mean ◽  
Index Level

The problem of flight tsafety , without regard to swift scientific and technical progress in industry of aviation equipment, become exceptionally sharp in our time. The statistical processing of empiric data is an actual task in monitoring of process of exploitation of propulsion MODULE of the Armed Forces of Ukraine and determination of tendencies of technical service and repair, directions of modernisation of armament and military equipment. The article considers the approach of the systems to the evaluation of reliability and safety of flights in relation to accomplishment of combat missions and preventionof aviation accidents. A methodological approach to the mathematical processing of statistical information for the period 2016-2019 on malfunctions was developed. The quantitative evaluation of their level is conducted on the generally accepted standardized indexes (statistical and probabilistic), specific methodology was here used. Index "parameter of failure flow" that characterizes the level of operating reliability and index "level of accident rate" that characterizes safety of flights were used in this methodology on ІСАО recommendation. Certain trends of changes of these indexes, the “upper control limit of reliability" and the considered conception of acceptable level of safety performance ( ALoSP) are expected for future periods for the different types of helicopters. On the base of operating data, the prognosis indexes expected, "upper control limit of reliability" on 2020 for the specific types of helicopters. As expected, according to obtained results, for all types of helicopters the mean value of this index will make not more than 4,3 failures per 100 flight hours. In accordance to conception of "acceptable level of "ALoSP" it is possible to distinguish three levels or "triggers" of flights safety : Acceptable level (Acceptable), special purpose level (Target), Critical level (Alert). These "triggers" are calculated taking into account the mean value of statistical sets of data about failures (for the last 3 years) and standard deviation that gives an opportunity to define the necessary additional measures of management to provide safety of flights. Authors came to the conclusion that conception of ALoSP is suitable for the evaluation of efficiency to provide flights safety of aviation of the Armed Forces of Ukraine with implementation of necessary adaptation to the existent terms of application of UKR aviation.

scholarly journals A PRIVATE MODEL OF INDEX IS A HINDRANCE OF STABILITY OF THE STATION OF ACCOMPANIMENT OF AIM OF ZENITHAL ROCKET COMPLEX OF SHORTER-RANGE

2020 ◽  
pp. 56-66
Author(s):  
V. Kudryashov ◽  
A. Artemenko ◽  
O. Kolomiitsev ◽  
R. Oliynik ◽  
Y. Zhivetc ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Analytical Method ◽  
High Efficiency ◽  
Modern Approach ◽  
Partial Model ◽  
Informative Parameters ◽  
Location Channel ◽  
Radio Location ◽  
Mathematical Design

Protecting from the action of radio of hindrances on the elements of zenithal rocket complex of shorter-range is one of important problems, that requires modern approach for her decision. Presently, influence of active hindrances is certain yet not enough on possibilities of armament on the defeat of air aims. In the article the analysis of influence of hindrances of different closeness is conducted on the station of accompaniment of aims of fighting machine of zenithal rocket complex shorter-range. The partial model of determination of index is offered hindrance of stability of the station of accompaniment of aim of zenithal rocket complex of shorter-range. The brought partial model over allows an analytical method to conduct the evaluation of values of conditional hit of model aim probabilities under various conditions. Mathematical calculations are conducted for: amplification of aerial of accompaniment of aim of fighting machine and aerials factors hindrance of producer; powers of hindrances on the entrance of accompaniment of aim of fighting machine; to the maximum sensitiveness of accompaniment of aim of fighting machine and relations hindrance/noise in the radio-location channel of accompaniment of aim; standard deviation of error of aiming of rocket depending on distance to the point of meeting of rocket with an aim in the zone of defeat taking into account influence of hindrances on the radio-location channel of accompaniment of aim of fighting machine; probabilities of passing of rocket in the «tube» of the set radius and conditional hit of aim probability at firing by one rocket; coefficient of зпомеха stability of accompaniment of aim of fighting machine; to conditional hit of aim probability hindrance of producer at firing by two rockets. On the accepted entry informative parameters and technical descriptions of accompaniment of aim of fighting machine certainly her maximum sensitiveness and relation hindrance/noise in this radio-location channel. On results mathematical calculations (mathematical design) corresponding charts that over is brought are got. From charts it is possible to define high efficiency of firing rockets on a model (air) aim.

PROBABILISTIC DETERMINATION OF TECHNOSPHERE OBJECT RELIABILITY UNDER HAZARDOUS INFLUENCES

2020 ◽  
Vol 15 (6) ◽  
pp. 809-818
Author(s):  
E.V. Gvozdev ◽  
Keyword(s):  
Safety Margin ◽  
Theoretical Description ◽  
Point Of View ◽  
Theory And Practice ◽  
Hazardous Substances ◽  
Building Structure ◽  
Reliability Indicators ◽  
Base Materials ◽  
Margin Of Safety

The subject of research is the process associated with determining the reliability parameter of buildings (structures) for their further operation in the technological process, causing effects in the form of additional loads (explosions, fires, vibration processes). The solution of such problems is relevant for the buildings (structures) acquired (rented) by the owner for further operation in the production process, in the technology of which fire and explosion hazardous substances (materials) are handled, stored or processed. The purpose of the study is to develop an approach that allows one to determine the parameter of the reliability of a building (structure) for operation under additional loads. To determine the indicators of safe permissible states of buildings (structures), the use of various criterion characteristics included in the content of deterministic, statistical and probabilistic approaches is given. A feature of assessing the reliability of buildings (structures) for their operation under additional loads (explosions, fires, vibration processes) is to determine the indicator of a given margin of safety and its stability under possible realized impacts. To solve the problem, it is proposed to use a simplified assessment of the safety margin of a building (structure) in terms of yield strength (for steel elements) and strength (for base materials, load-bearing walls, partitions and ceilings) corresponding to the maximum permissible values for their destruction. A consistent theoretical description of the formulas is presented, which makes it possible to establish a relationship between the safety margin of a building (structure) and the probability of its destruction under the implemented influences. An innovative approach is described that allows solving problems of assessing the strength reliability of structural elements of buildings (structures), when it is important to obtain guaranteed characteristics of an indicator of a given safety margin, its resistance to possible realized influences (explosions, fires, vibration processes). The use of the material in order to determine the reliability indicators based on risks allows us to consider the calculated values of the safety margin of a building (structure), which meets the established requirements for assessing efficiency from the point of view of the theory and practice of operations research.

scholarly journals Management of the “building-base system” action, using a life cycle model

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Justyna Sobczak-Piąstka ◽  
Oksana Kichaeva ◽  
Pavlo Firsov ◽  
Sergey Zolotov ◽  
Yuriy Famulyak
Keyword(s):  
Life Cycle ◽  
Technical Condition ◽  
System Management ◽  
Technical Solution ◽  
Base System ◽  
Reliability Indicators ◽  
Current State ◽  
Proposed Model ◽  
Before And After

AbstractThis research aims to highlight the problem of creating various models that reflect the life cycle of the “building-base” system, and link the reliability of this system with its technical condition. Based on the proposed model of the life cycle “reconstructed building-base”, it is possible to regulate the condition of the building towards its restoration, changing the category of technical condition to higher and obtain new, adequate to the current state, reliability indicators. During the operation of this model, it is possible to control the system management on the basis of the obtained quantitative values of reliability. The result of the reliability calculation is the determination of such a technical solution of strengthening the “building-base” system, which will provide a given level of reliability. The research provides an example of the calculation of an operable monumental building before and after its restoration.

scholarly journals DETERMINATION OF VIRULENCE PROPERTIES OF PATHOGENIC MICROORGANISMS IN VITRO: STATE-OF-ART

2016 ◽  
pp. 100-108
Author(s):  
T. P. Shmelkova ◽  
E. V. Sazanova ◽  
A. L. Kravtsov ◽  
T. A. Malyukova ◽  
Yu. A. Popov ◽  
...  
Keyword(s):  
Molecular Genetic ◽  
Biological Properties ◽  
Pathogenic Microorganisms ◽  
Informative Parameters ◽  
Complex Approach ◽  
Causative Agents ◽  
State Of Art ◽  
Virulence Properties

Various methods for evaluation of virulence properties of causative agents of infectious diseases in vitro were analyzed: molecular-genetic, cultural-biochemical, immunologic, physiologic. Predominant use of molecular-genetic methods, expediency of a complex approach, relevance of search of novel informative parameters of virulence are noted. Study of biological properties of pathogens in vitro is the first screening stage of evaluation of their virulence.

scholarly journals Devising a method to control the operational quality and reliability of fiber-optical communication lines

2021 ◽  
Vol 5 (3 (113)) ◽  
pp. 92-100
Author(s):  
Sergii Kiforuk
Keyword(s):  
Access Network ◽  
Economic Losses ◽  
Technical Documentation ◽  
Communication Breakdown ◽  
Reliability Indicators ◽  
Operational Quality ◽  
Quality And Reliability ◽  
Low Efficiency ◽  
Communication Lines ◽  
Operational Data

The lack of recommendations in the normative and technical documentation related to fiber-optic communication lines (FOCL) for assessing their technical condition necessitated devising a method to control the lines' quality and reliability of operation. The method creates the basis for calculating the quality and reliability indicators of FOCL operation and suggests measures to improve them. It determines the methods of control, as well as the acquisition, accounting, and analysis of damage statistics with and without interruption of communication. The graphic sequence of implementation of the stages of the method demonstrates that resolving the task to control these indicators should involve: – managing the acquisition and actual acquisition of operational data on damages (the causes, nature, quantity, the duration of communication breakdown and complete elimination of damage); – determining the quality and reliability indicators of FOCL operation annually; – analysis of the obtained results and the development (correction) of measures to comply with the norms of these indicators; – the implementation of measures to comply with the norms of quality and reliability of FOCL operation (if necessary). Based on the operational data from a line operator acquired over three years in the specified climatic zone (a cable of the type OKLBg-3 DA12-3×4E-0.4F3.5/0.22N18-12/0), the methodical component of the method was examined. The obtained results on the operational quality (damage density, average damage duration, break (downtime) of communication) and reliability indicators (FOCL readiness factor) of a subscriber access network without reservation showed that the line had low efficiency. The communication breakdown over three years amounted to K=12,569.8 stream∙hours. The downtime at this volume of digital stream∙hours has led to significant economic losses. Line operators have been given recommendations for the proper FOCL operation and ensuring a normalized value of the line readiness coefficient. To this end, it is necessary to reduce the time to re-link and prolong the line's failure-free operation

scholarly journals DETERMINATION OF OPERATIONAL RELIABILITY INDICATORS OF AVIATION EQUIPMENT TAKING INTO ACCOUNT ICAO RECOMMENDATIONS

2021 ◽  
pp. 25-35
Author(s):  
O.L. Bursala ◽  
V.M. Golub ◽  
O.M. Cherednikov ◽  
V.M. Chupryna ◽  
I.V. Kovalenko
Keyword(s):  
Operational Reliability ◽  
Functional Systems ◽  
Reliability Indicators ◽  
Equipment Reliability

On the basis of the developed technique for estimation of aviation equipment reliability indicators, the results of determination of orientating reliability indicators of helicopters and their functional systems are presented. The list and the main reasons for the change of reliability indicators for 2016–2020 are determined.

scholarly journals Electrical, Electronic and Electromechanical Parts for Space Applications

2021 ◽  
Vol 8 (2) ◽  
pp. 88-101
Author(s):  
M. I. Krasnov ◽  
◽  
V. B. Steshenko ◽  
Keyword(s):  
Current Situation ◽  
External Factors ◽  
Electronic Equipment ◽  
Electrical Characteristics ◽  
Space Technology ◽  
Space Applications ◽  
Radio Electronic ◽  
Reliability Indicators ◽  
Onboard Equipment

The electrical, electronic and electromechanical parts (EEE parts) used in spacecraft onboard equipment must fully provide the target technical characteristics of radio-electronic equipment in terms of functional and electrical characteristics, as well as resistance to external factors and reliability indicators. The authors of the article analyze the current situation with the EEE parts and consider the prospects for the development and creation of the necessary electronics products. Currently, the results of the work are confirmed by the active use of the created space components in space technology.

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