Программа для расчета показателей долговечности электронных средств
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.
In this work we considered the problem of reducing the recovery time of the electronic means in general. It is revealed that the key role in the evaluation of this parameter is the time of trouble-shooting. A solution to this problem was proposed, by using automation tools to monitor the parameters of secondary power supplies.
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 disadvantages of the traditional method of calculating spare parts, tools and accessories package (SPTA) are considered. A multi-criteria methodology for calculating SPTA package has been developed for the simultaneous use of several criteria, such as weight, size or cost. Based on the convolution method, which allows to reduce the multicriterial task to a scalar one. To check the eectiveness of the developed method, SPTA package for a mobile communications vehicle was calculated using the current one-parameter and developed multi-parameter methods. The weight and volume of the required SPTA package was used as limitations. Based on the results obtained, an analysis of the developed method was carried out.
The development of wireless communication technologies attracts increased interest to scenarios that impose severe restrictions on data transmission reliability and latency. Such scenarios include real-time applications, such as industrial automation, remote control, video streaming, and virtual reality. It is very difficult to satisfy the requirements imposed on the quality of service with the currently widespread communication technologies. Specifically, it is currently impossible to guarantee a low delay in Wi-Fi networks due to some peculiarities of the applied channel access methods. In this work, we study an approach that provides a low latency and high reliability of communications in Wi-Fi networks on the basis of an additional radio air interface. This approach is studied using the mathematical model of a heterogeneous network, which consists of devices that generate prioritized and non-prioritized data packets. The results of studies show that this approach provides the ability to satisfy the requirements of real-time applications, when certain restrictions on the intensity of prioritized traffic are met. In this case, a decrease in the throughput for non-prioritized traffic is insignificant.
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.
The disadvantages of the methodology for calculating the set of spare parts, tools and accessories (SPTA). A multi-criteria methodology for calculating a local package SPTA based on the convolution method has been developed that allows simultaneous use of several optimization criteria (weight, volume, cost). Based on the convolution method, which allows to reduce the multicriterial task to a scalar one. To check the effectiveness of the developed methodology, the calculation of the local package SPTA for the aviation radar complex was carried out using the current one-parameter and developed multi-criteria techniques. The weight and size of the required spare parts kit was used as limitations. On the basis of the results obtained, an analysis was conducted of the effectiveness of the developed methodology.