Wyniki 1-10 spośród 11 dla zapytania: authorDesc:"Yuriy BOBALO"

Generalized robust parameters distribution model

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The quality and adequacy of mathematical models on base of Gram-Charlier and Edeworth rows was shown.In spite of great number of theoretical and .practical investigation, that were made as in Ukraine as in the other countries of the world in the area of analysis and synthesis of electronic devices components parameters, present methods, approaches and software are deficient of stateof- the-ar[...]

Analysis of quality of radio electronic devices in multistage production systems

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The paper presents the results of mathematical modeling of the process leading to the imperfections in the mustistage production line of radio-electronic devices. The matrix approach to this problem is proposed. The main conclusion of the research is that simultaneous development of theory and practice of management of such systems can reduce the imperfections of the radio-electronic products. Streszczenie. Praca przedstawia badania dotyczące modelowania procesu powstawania defektów i niedoskonałości w elementach radioelektronicznych w czasie wielu etapów technologii produkcji. Proponuje się macierzowe podejście do opisu sekwencji produkcyjnych tych elementów. Pokazano, że równoczesny rozwój teorii i praktyki zarządzania takimi procesami może przyczynić się do zmniejszenia niedoskonał[...]

The estimation of radio-electronic devices reliability on the basis

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Estimation the radio-electronic device's reliability by the efficiency probability has been research in this paper. The approach based on interval data analysis proposed. Its low calculable complexity in comparing to the known methods has been shown. Streszczenie. Artykuł przedstawia sposób oszacowania bezawaryjnego czasu pracy urządzeń radioelektronicznych. Zaproponowana metoda bazuje na analizie interwałowej charakterystyk wyjściowych urządzeń. W artykule wykazano również niski koszt obliczeniowy prezentowanego podejścia w stosunku do innych metod. (Określanie stopnia niezawodności urządzeń elektronicznych na podstawie analizy interwałowej) Keywords: Radio-Electronic Circuit, Reliability, Operational Suitability, Tolerance Domain of Parameters, Interval Data Analysis. Słowa kluczowe: urządzenia radioelektroniczne, bezawaryjny czas pracy, interwałowa analiza danych Introduction Reliability of radio-electronic devices (RED) is their ability to perform their specified functions while maintaining, for a required period of time, operational performance within acceptable limits, and to resume their operation that was lost due to some reasons [1]. The concept of reliability is directly related to the estimation of the probability of operational suitability of RED in the course of its development and operation. In general, reliability of RED is directly determined by reliability and operational suitability of its components which are radio-electronic circuits (REC). While designing a REC one should find the vector of nominal parameters of the elements, which provides nominal values of output characteristics. In the process of production and operation of the equipment the real values of the output characteristics differ from the nominal ones. Moreover, the significant deviations of the real values from the nominal ones leading to the loss of operational suitability of REC, i.e. the output characteristics fall outside specified inte[...]

Investigation of influence of parameters of the digital telecommunication system on its efficiency DOI:10.15199/48.2019.09.12

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The necessity of increasing the efficiency of digital telecommunication systems or networks is due to the continuous increase of data volumes transmitted by such systems or networks. This task can be solved by optimizing a number of system or network parameters based on the adoption of certain compromises. To make the right decision, we need to know the impact of each parameter of telecommunication system or network on their efficiency. Recently, a lot of attention is focused on this issue [1-6]. However, the development of complex indicators to detect the influence of the parameters of a digital telecommunication system or network on their efficiency remains an actual task. The purpose of this work is to study the influence of parameters of digital telecommunication system or network on their technical efficiency through the use of a complex indicator. Basic parameters of the digital telecommunication system, which influence on its efficiency Let's consider the basic parameters of the digital telecommunication system, which influence on its efficiency. Among them, the most important are the data rate, the ratio of the energy of one data bit to the power spectral density of the white noise and the system throughput. The data rate Vb (bps) is: (1) Vb [...]

OPTAN - Software for Modelling, Analysis and Optimization of Electronic Devices Process Improvement

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The formalization and modelling of quality control processes problem is considered. Matrix presentation of components of electronic devices quality control and maintenance modelling process is proposed. The correspondent software for complex optimization was developed. The efficacy of developed program package was shown. The peculiarities of developed software for modelling, analysis and optimization of electronic devices process improvement OPTAN1 are described. Streszczenie. Rozważono formalizację i modelowanie problemu procesu sterowania. Przedstawiono macierz składników sterowania jakością elektronicznych urządzeń i modelowania procesów. Rozwinięto oprogramowanie związane z kompleksową optymalizacją. Pokazano użyteczność pakietu opracowanego programu. Opisano cechy charakterystyc[...]

Research into emergence of radio electronic devices quality forming systems

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The results of the formalization of radio electronic apparatus quality providing processes and experimental studies of technological systems emergence are given. Streszczenie. W pracy przedstawiono formalne określenie jakości elektronicznej aparatury radiowej z uwzględnieniem teorii matematycznej i praktycznych eksperymentów. (Formalne określenie jakości elektronicznej aparatury radiowej z uwzględnieniem teorii matematycznej) Keywords: quality of radio electronic devices, emergence of technological systems, defectiveness. Slowa kluczowe: jakość urządzeń elektronicznych, projektowanie procesów technologicznych, awaryjność. Introduction Technological processes of manufacturing radio electronic devices in their essence are hierarchical systems which ensure their quality and reliability. Depending on the accepted level of abstraction they can be considered as a set of commonly functioning elements -local subsystems, with each being characterized by its own series of features as well as its own indices of defectiveness. The research has shown that indices of additive and multiplicative defectiveness the nature of which is essentially different can be interpreted as integral indices of the product quality [1]. The additive product defectiveness is defined by the sum of indices of the elements defectiveness, i.e. the sum of indices of the separate subsystems. The multiplicative defectiveness results from the emergence caused by interaction between the system elements leading to the appearance of new and sometimes unexpected features. This phenomenon has not thoroughly studied yet though the multicomponent of general defectiveness proved to be able to reach and exceed the level of additive defectiveness. The research done enabled these processes to be formalized, and the mathematical models of additive and multiplicative defectiveness of radio electronic apparatus to be obtained. The results of the experimental research are presented[...]

The concept of electronic textbook "Fundamentals of theory of electronic circuits"

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This paper presents the development of electronic textbook “Fundamentals of theory of electronic circuits". The main focus is laid on the concept, structure and the basic principles of the electronic textbook. The detailed procedure of evaluation of knowledge acquired by student in the field of electronic circuits is discussed. Streszczenie. Artykuł prezentuje doświadczenie autorów w tworzeniu elektronicznego podręcznika do nauczania podstaw teorii obwodów elektronicznych. Główny nacisk położony jest na rozwój koncepcji tego typu nauczania, strukturę podręcznika oraz podstawowych wymagań, które musi spełniać. Ważnym elementem artykułu jest dyskusja dotycząca procedury oceny wiedzy studenta nabytej przy studiowaniu elektronicznej wersji podręcznika. (Koncepcja podręcznika elektronicznego "Podstawy teoretyczne obwodów elektronicznych") Keywords: electronic textbook, distance learning, virtual learning environment Słowa kluczowe: elektroniczny podręcznik, uczenie na odległość, środowisko uczenia wirtualnego Introduction The self-study is the form of knowledge that is now widespread in Ukraine and abroad. It is a self - directed individual activity leading to increasing the someone knowledge and experience. In some western countries, this form of study has been existed quite a long time and reached great popularity among students and teachers because of its economy and training effectiveness. There are many technologies used for learning: Moodle, Atutor, Claroline, eCollege. However, the disadvantage of the above technologies is that they work only with "standard test" and automatic generation of input data for exe[...]

Predicting the reliability of radio-electronic devices by the monitoring of production defectiveness

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The concept of predicting the reliability of radio-electronic devices at the stage of its production based on defectiveness monitoring during the performance of technological and controlling procedures was laid. The results of theoretical and experimental investigations of the processes of manufacturing defection and experimental-statistical and theoretical-statistical methods of predicting the reliability of equipment on this basis were given. Streszczenie. Przedstawiono koncepcję przewidywania niezawodności urządzeń radioelektronicznych. Diagnoza niezawodności może być wykonywana na etapie produkcji w oparciu o śledzenie usterek podczas procesów produkcyjnych i kontrolnych. Podano wyniki teoretycznych i doświadczalnych badań procesów powstawania uszkodzeń z wykorzystaniem metod statystycznych przewidywania niezawodności urządzeń. (Prognozowanie niezawodności urządzeń radio-elektronicznych przez monitorowanie uszkodzeń w procesie produkcyjnym) Keywords: reliability, predicting, monitoring, manufacturing defects. Słowa kluczowe: niezawodność, prognozowanie, monitorowanie, defekty produkcyjne. 1. Introduction The statistic analysis of functioning of multi-purpose radio-electronic devices (RED) confirms the tendency of monotonous increase of its reliability at almost constant refuses ratio due to the reasons of defects, admitted during designing, production and exploitation. The part of refuses, caused by production defects, reaches the half of total refuses quantity, detected during its exploitation. Therefore, the reduction of its quantity is the real reserve of reliability increasing of current equipment type. The solution of this problem can be reached through the way of complex optimization and controlling of production processes using the results of defectiveness monitoring. As the result, we receive the determination and providing of allowable defectiveness level during every stage of technological process at the conditions of[...]

Forecasting the Quasi-Deterministic Parameters' Drifts of Radioelectronics Apparatus on the Basis of Quantile Zones Techniques

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This paper describes a method of forecasting the guaranteed operating time using the quantile zones. Also there are presented calculations of the guaranteed time operating error. Streszczenie. Artykuł przedstawia metodę przewidywania bezawaryjnego czasu pracy urządzeń elektronicznych w oparciu o teorię kwantyli. Dodatkowo autorzy dokonują analizy błędów prezentowanej metody. (Oszacowanie bezawaryjnego czasu pracy urządzeń radioelektronicznych na podstawie teorii kwantyli) Keywords: quasi-deterministic, quantile zones, parameters' drifts, reliability, guaranteed time, probability Słowa kluczowe: niestabilność parametrów , niezawodność, bezawaryjny czas pracy Introduction The processes of parameters' drift in precision long-term service electronic apparatus are, in their physical essence, processes with clearly noticeable monotonic and fluctuating components. Taking into account the proportion between the components, one may classify those processes as belonging to the class of quasi-deterministic processes. Research has shown that in the case of certain equipment operating conditions and the appropriate impact of destabilizing factors, it is possible to develop identified models of parameters’ drift in the form of quantile zones. On this basis, techniques of forecasting the reliability of the equipment have been developed; the techniques allow us to determine faultness probability and the guaranteed time interval of remaining the parameters within tolerance limits as well as to assess quantitatively the accuracy of forecasting. The results of investigating the dependencies of the forecasted reliability on deterministic and stochastic characteristics of the drifts have been presented. Statement of the Problem The processes of parameters’ drift in radioelectronic longterm service apparatus are, to a great extent, characterized by two components: monotonic drifts and fluctuating drifts. The special feature [...]

Evaluation of functional device suitability considering both random technological deviations of its parameters from their nominal values and the process of components' aging DOI:10.12915/pe.2014.04.054

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One of main parameters of a device is its functional suitability. In the course of the device operation, the device components change their parameters under influence of environment; this process is called aging. Under such conditions, the problem of evaluating functional suitability of the device emerges that needs to be solved taking into account real processes of its aging. Streszczenie. W pracy omówiono problem zmian funkcjonalności urządzenia ze względu na technologiczne odchylenia parametrów od wartości nominalnych i procesów starzenia. (Ocena zmiany funkcjonalności urządzenia z uwzględnieniem odchylenia parametrów od wielkości nominalnych i procesów starzenia) Keywords: functional suitability, aging process, confidence ellipsoid. Słowa kluczowe: funkcjonalnosć urządznia, starzenia, elipsoida zaufania doi:10.12915/pe.2014.04.54 Introduction Functional suitability of a device is a complex concept that is used for evaluation of such key characteristics of the device as performance, endurance, reliability, recoverability, and others. This is the ability of a device to perform specified functions, while maintaining its operational performance within specified limits for a required period of time. Analysis of functional suitability of a device with consideration of random deviations of its components' parameters in the course of its operation was conducted in numerous works, in particular in [1, 3]. In most cases researchers assume that random deviations of the device components' parameters from their nominal values are normally distributed, both those occurring during the manufacture process and those occurring in the course of its operation. However, while this assumption is mostly true for random deviations occurring during the manufacture process, it is not always true for random deviations of the device components' parameters occurring in the course of its operation. The point is that in the course of dev[...]

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