Особенности учета тепла в расчете надежности радиоэлектронной аппаратуры
The basic influencing the factor defining its reliability are temperature influences at which speed of chemical reaction of materials a part REE increases. It is represented the equation which has been received by the Swedish chemist Svante Arreniusom from thermodynamic reasons
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.
The monograph presents results by professor Dr. A. Shalumov’s Research School of Modeling, Information Technology and Automated Systems (Russia). The program, ASONIKA, developed by the school is reviewed here regarding reliability and quality of devices for simulation of electronics and chips during harmonic and random vibration, single and multiple impacts, linear acceleration and acoustic noise, and steady-state and transient thermal effects. Calculations are done for thermal stress during changes in temperature and power in time. Calculations are done for number of cycles to fatigue failure under mechanical loads as well as under cyclic thermal effects. Simulation results for reliability analysis are taken into account. Models, software interface, and simulation examples are presented.
For engineers and scientists involved in design automation of electronics.
Development of the questionnaire “People and plants” aimed at assessing individual variety in person’s interaction with the plant world. The method’s relevancy for studies on the restorative function of the natural environment is substantiated. 732 respondents participated in the study (Mage = 19.1, SDage = 2.1, 549 female, 137 male, 46 did not indicate their gender). The questionnaire includes 32 statements measured on a four-point scale, and five sub-scales: Joy, Esthetics, Practice, Closeness to nature, and Ecology. The new tool has satisfactory psychometric characteristics (retest reliability and consistency) and convergent validity, verified by comparison with questionnaires Nature connectedness and Environmental identity. Gender differences are found: all scores except Practice are higher in the female group. The questionnaire can be recommended for research, educational and psycho-developmental programs.
The modern level of technological advance allows the use of CAD systems at all the stages of the electronic communication modules development, which allows the designers to discard the time-consuming process of manufacturing and testing an experimental prototype. To organize the interaction of various CADs the design techniques are used. The report discusses the integrated cross-cutting design technique implemented using National Instruments software products. Their advantages and disadvantages are evaluated. The use of the NI LabView made it possible to implement a dynamic calculation of reliability indicators through the use of NI LabView Multisim Connectivity Toolkit, which confirmed the possibility of realization an integrated cross-cutting design technique.
The paper offers methodology for estimation of durability indices of the modern integrated circuit communication network, which has reports about the conducted tests on non-failure operations and conservability, but has no data for the durability. The paper describes two approaches, which apply for generation of basic data and which allow to receive reliable result, typical for the certain operating conditions.
The unprecedented proliferation of smart devices together with novel communication, computing, and control technologies have paved the way for A-IoT. This development involves new categories of capable devices, such as high-end wearables, smart vehicles, and consumer drones aiming to enable efficient and collaborative utilization within the smart city paradigm. While massive deployments of these objects may enrich people's lives, unauthorized access to said equipment is potentially dangerous. Hence, highly secure human authentication mechanisms have to be designed. At the same time, human beings desire comfortable interaction with the devices they own on a daily basis, thus demanding authentication procedures to be seamless and user-friendly, mindful of contemporary urban dynamics. In response to these unique challenges, this work advocates for the adoption of multi-factor authentication for A-IoT, such that multiple heterogeneous methods - both well established and emerging - are combined intelligently to grant or deny access reliably. We thus discuss the pros and cons of various solutions as well as introduce tools to combine the authentication factors, with an emphasis on challenging smart city environments. We finally outline the open questions to shape future research efforts in this emerging field.
In this volume of “Lecture Notes in Networks and Systems”, we are pleased to present the proceedings of the 18th International Multidisciplinary Conference on Reliability and Statistics in Transportation and Communication (RelStat 2018), which took place in Riga in Latvia, from October 17 to October 20, 2018. This event belongs to a conference series started in 2001 and organized annually by the Transport and Telecommunication Institute (TTI) in Riga, Latvia. The mission of RelStat is to promote a more comprehensive approach supporting new ideas, theories, technologies, systems, tools, applications, as well as work in progress and activities on all theoretical and practical issues arising in transport, information, and communication technologies. Results of previous editions of RelStat were published by TTI Publishing House (RelStat 2001–2015) in the journal “Transport and Telecommunication” (ISSN 1407-6160), by Elsevier in the “Procedia Engineering” (RelStat 2016) and by Springer in “Lecture Notes in Networks and Systems” volume no. 36 (RelStat 2017). Design, implementation, operation, and maintenance of contemporary complex systems have brought many new challenges to “classic” reliability theory. We define complex systems as integrated unities of assets: technical, information, organization, economical, software, and human (users, administrators, and management) ones. Their complexity comes not only from their technical and organizational internal structure, which is built upon diverse hardware and software resources, but also from the complexity of information processes (data processing, monitoring, management, etc.) that must be executed in their specific environment.
The aim of research is determine the feasibility of using the methodology for calculating availability and mean delay time to demand fulfilling for spare part by local package of electronic means (EM) with a compound structure of spare parts, tools and accessories(SPTA) kit. Methodology is based on the usage of the analytical model “EM – SPTA kit” with an assessment of the failure level. The main advantages of this technique are possibility to split the main structure of the spare parts system to set of simple, possibility of calculating spare parts sets for several types of replenishment strategies, the simplicity of verification the model for assessing the availability rate and the average delay in satisfying a request for a spare part. Possibility of calculating spare parts sets for several types of replenishment strategies. Simultaneously the technique has a significant drawback, such as methodical technique gives an approximate value of the sufficiency indicators with an calculation error. At the conclusion were proved the ability to use electronic methods for calculating the availability`s rate and the average latency in satisfying the request for the spare part of the spare parts kit system for some replenishment strategies, which also allows to calculate the availability rate for the “EM- SPTA system” model, which is proved to be possible for modern structures of the spare parts system.