Разработка методики выявления факторов, наиболее сильно влияющих на надежность электронных устройств
Purpose. In order to determine the level of the reliability of electronic device it is necessary to develop method for analyzing the results of calculation its reliability measures. Such measures are reliability function and mean operating time between failures. Developed method will allow estimating which parameter most strongly effects on the final value of the failure rate for the particular type of the electronic equipment. As a result of the reliability analysis of all the components of electronic device an engineer should obtain values of the reliability measures, boundary values of the operated parameters, and also the recommendations about this or another changes needed for the improvement of the reliability of the electronic device. The aim of the paper is to develop the method for analyzing the results of the reliability measures calculation. All known methods estimate the effect of the parameters by comparing values of the correction factors. New method will allow to analyze calculated values of the factors and to determine the effect of each individual parameter for each correction factor using the relative sensitivity function. The second statement is the main benefit of this study. The parameters considered in the analysis can include, for example, temperature, nominals of the elements, their operating voltage, current and power and tolerance value. Results. The application of the developed method will allow making precise recommendations for changes of the operated parameters. This, in its turn, will help to control the reliability level of one or another element and, consequently, of whole electronic devices.
Many electronic devices operate in a cyclic mode. This should be considered when forecastingreliability indicators at the design stage.The accuracy of the prediction and the planning for the event to ensure reliability depends on correctness of valuation and accounting greatest possiblenumber of factors. That in turn will affect the overall progress of the design and, in the end,result in the quality and competitiveness of products
In the research shows the importance of protecting electronic devices from the effects of vibration in terms of their stability and durability. The task of volume 6-stage vibration insulation taking into account rotary fluctuations of a design of electronic devices round axes of the Cartesian system of coordinates is set. Systems of the equations on which the topological model of mechanical processes in system of depreciation of the block of the electronic device is constructed are received. Possibility of connection of macromodels with various number of levels of cascade system of vibration insulation and different quantity of internal elements on each of them is shown. Total accelerations on printing knots and on separate electronic components allow to estimate mechanical stability and durability of electronic devices. © 2015 Medwell Journals.
The patented device represents the smartwatches realized according to the concept "The Internet of things". Hours are capable to collect and process meteodata from the built-in sensors and also to notify the user on dynamics of their changes online, by means of a mobile application. In the device the unique design of the converter of tension is applied to power supply of gas-discharge indicators and the module of a wireless communication Wi-Fi allowing the device to combine in itself functions the Internet of things, hours and the weather station.
Hours are executed in vintage style thanks to six gas-discharge IN-14 indicators. In addition, design of hours was carried out at observance of standards in the field of IPI-technologies.
The report covers the method of the estimated life of electronic devices of control and communication systems at the stage of their development. Mathematical model of life control and communication systems and electronic devices are provided. It is shown that the value of the life of control and communication systems significantly depends on the coefficient of variation of life of electronic devices.
The advantages and disadvantages of manometers with a resilient sensing element. A complete factorial experiment to determine the dependence of the metrological reliability of manometers. To investigate the effect of the level and duration of measured pressure overload full factorial experiment was performed. As the objects of experiment were new faultless manometers of the lower price segment of the most popular producers in Russia - «WIKA» (Germany), "Rosma" (Russia) and "Meter" (Russia). Since all investigated manometers have a similar structure, but different materials and sensor gear, the experimental results may indicate a low quality of measuring system materials, used for the lower price category manometers. The methods of manometers protection against overloads.
Generalized error-locating codes are discussed. An algorithm for calculation of the upper bound of the probability of erroneous decoding for known code parameters and the input error probability is given. Based on this algorithm, an algorithm for selection of the code parameters for a specified design and input and output error probabilities is constructed. The lower bound of the probability of erroneous decoding is given. Examples of the dependence of the probability of erroneous decoding on the input error probability are given and the behavior of the obtained curves is explained.
The dynamics of a two-component Davydov-Scott (DS) soliton with a small mismatch of the initial location or velocity of the high-frequency (HF) component was investigated within the framework of the Zakharov-type system of two coupled equations for the HF and low-frequency (LF) fields. In this system, the HF field is described by the linear Schrödinger equation with the potential generated by the LF component varying in time and space. The LF component in this system is described by the Korteweg-de Vries equation with a term of quadratic influence of the HF field on the LF field. The frequency of the DS soliton`s component oscillation was found analytically using the balance equation. The perturbed DS soliton was shown to be stable. The analytical results were confirmed by numerical simulations.
Radiation conditions are described for various space regions, radiation-induced effects in spacecraft materials and equipment components are considered and information on theoretical, computational, and experimental methods for studying radiation effects are presented. The peculiarities of radiation effects on nanostructures and some problems related to modeling and radiation testing of such structures are considered.
This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .
The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.