Метод автоматизированного синтеза параметров системы виброудароизоляции конструкций радиоэлектронных средств
The described method and algorithm for automatic synthesis of systems vibrodiagnostic while broadband random vibration and shock impacts on the design of electronic equipment. In carrying out the process of optimization of the system parameters vibrodiagnostic in vibro-impact creates a common basis for summation vibration and shock - spectral density effects. Shock impulse, given in the time domain translates in spectral shape (spectral density overload) using a direct Fourier transform. The calculation of the overload on the structure and deformation vibration isolators in vibro-impact produced using the inverse Fourier transform of the transition from a spectral representation of a reaction to a temporary.
To optimize a global optimality criterion that takes into account the requirements for efficient installation of system of vibrodiagnostic and weakening of the shock and vibration effects on the construction in which the possible values of operating temperatures. The described algorithm was developed PC program.
For the effective functioning of the onboard avionics, require sealing. Gasket failure rate directly affects the probability of successful operation of the device in a sealed condition. Gasket failure rate, in turn, depends on many factors.
The publication contains materials of the conference dedicated scientific-technical problems in the field of Radioelectronics, telecommunications and computer engineering.
The publication is intended for researchers, engineers and graduate students.
The method of optimization of systems to ensure thermal regimes REA (TCS), which as a model of heat transfer method uses electrothermal analogy and relies on the criterion of optimal design RESEARCHER. The criteria taken into account by the ratio of costs to sell is the amount of the value of the system elements RESEARCHER, the cost of power consumption and the amount of weight applied RESEARCHER to produce effects (qualitative assessment) is the deviation of temperature on the cooled element from the set of values to ensure the required reliability.
In article tasks in view of creation of a technique of identification of thermal parametres, a method of cooling by means of thermal tubes and working out of a subsystem of modelling of thermal processes in radio-electronic means of any design are proved also.
There are the real importance in global management of quality for light production`s enterprises. The article describes the way of installation of the composite indicator of enterprise` s operation`s effectiveness in situation of concrete organization, where the way of production activity and specific types of defects are observed. At the end of researches the recommendations of economic results improvements and promoting competitiveness are published. It can be used for all light production`s enterprises for optimization of product quality`s controlling system
The monograph contents totaled the many years results of Scientific school «The Automated System for Ensuring of Reliability and Quality of Equipment - ASONIKA» National research University «Higher school of Economics» (scientific supervisor of the Scientific school - academician of RANS, doctor of technical sciences, professor YU. Kofanov) and long-term cooperation with the scientists of Kiev Institute of mathematical machines and systems problems of the Ukrainian National Sciences Academy (Deputy Director on science, doctor of technical sciences V.P. Strelnikov). The final structure of the monograph had been formed in the discussion of modern problems of reliability aerospace electronic equipment at the XVII International scientific-technical conference «Systemic problems of reliability, quality, mathematical modelling, information and infocommunication technologies in innovation projects». This conference was dedicated to the 20th anniversary of the HSE. The book outlines the basics of probability-physical approach to the study and the assessment of the reliability of onboard aerospace equipment. Presents the methods of estimation of reliability parameters of electronic components, as according to reference data and test or operating results in the presence or absence of failures. Developed the methods of calculation of reliability parameters of mechanical elements of aerospace equipment as well as research methods reliability of redundant and non-redundant, non-renewable and renewable systems on the basis of adequate two-parameter distributions of diffusion. Established the theory of planning reliability test with lightweight, durable, including accelerated testing with new methods of processing the testing results and reliability assessment. We propose new methods of evaluation and prediction of the aerospace equipment reliability to measure the determining parameters. Developed methodology of the statistical characteristics evaluation of the degradation process for the study of single samples of aerospace equipment using information about its representative minobject (minibranch, mineralizatsiya). All problems of reliability, which is solved in this book (mathematical modeling, calculation and experimental evaluation of the reliability of systems) result in the identification of the time until failure (or to failure) distribution. It is proved that when assessing the reliability of onboard aerospace equipment, most accurate results diffusion DN-distribution. On the basis of the law of distribution can be carried out the evaluation of all the necessary parameters of aerospace equipment reliability (mathematical expectations developments, gamma-interest developments, the probability of non-failure operating time for the specified time, the residual resource and others). The book provides a large number of examples and problems, proving the effectiveness and efficiency of the proposed methods. Material monograph mostly taught HSE in the various courses of lectures. The monograph is intended for a wide circle of specialists working in the field design, testing and operation of onboard aerospace equipment, as well as students and graduate students of the HSE in the execution of their coursework, independent scientific research, and the preparation of graduation theses and dissertations.
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.