Особенности разработки макромоделей надежности сложных электронных систем
Collection of theses of reports. XXI Scientific and technical conference of young scientists and experts. In 2 Volumes.
In sixteen sections 327 reports on scientific research, design and methodical developments, experimental works and also works on creation and introduction have been presented to improvement of methods of management and the organization of developments to production of progressive technological processes, materials. About a half of the submitted reports are prepared by the staff of RCC Energia.
The work deals with the calculation of the resource of radioelectronic equipment by the method of statistical modeling using the example of one and several elements, and conclusions are made about the advisability of carrying out such calculations
The article examines the creation of program to assess the performance durability of radio-signals processing devices. This type devices are widely used in various communication systems and performance durability of these devices have a significant impact on performance durability communication systems. In the currently accepted methods of assessment of the durability indicators of device can be performing calculations in two stages (approximate and refined calculation). This is when a large number of elements significantly increases the complexity associated, primarily, with the search data on the durability characteristics. Therefore, given in the methods the model used for the conversion of durability indicators of the maximum allowed modes and conditions of the use of elements (approximate calculation) to operating modes (refined calculation), is quite simple. However, the use of such models although not strongly influences the complexity of the calculations, but may lead to less accurate estimates of durability indicators. This error will be greater than the maximum allowed modes and the conditions of application of elements differ from operating modes. However, modification of models aimed at improving the accuracy of the calculations that will lead not only to increased complexity of the calculations, but also requirements for the qualification of specialists and, consequently, to the need to create appropriate software and databases. In addition, the need to create such software due to the lack of commercial software tools for the calculation of reliability of domestic and foreign manufacturers of modules of calculation of durability. When creating the calculation program of durability indicators of the radio-signals processing devices were the main requirements, the scheme of information exchange with CAD-systems and specialized CAE-systems, to determine the composition of software modules and the functioning algorithm of the program and designed the model database according to the durability characteristics of elements. This research carried out in 2015 was supported by "The National Research University "Higher School of Economics" Academic Fund Program" grant (No. 15-05-0029).
The paper discusses the optimization of the database for storing the coefficients of mathematical models used in assessing the reliability characteristics of electronic products listed in the reference book "Reliability of ERI".
For evaluating the integrated supply chains' (SCs) effective functioning, some new criteria are frequently used apart from the total logistics costs (TLC). These criteria characterise the quality and reliability of accomplishing logistics operations and functions. It is obvious that these metrics are connected and their separate representation is a consequence of not enough developed supply chains' theoretic model and, accordingly, analytical tools allowing carrying out a comprehensive assessment of these metrics. The paper presents the critical analysis of the existing approaches to the TLC evaluation and SC reliability, the methodical approach which allows evaluating the total costs indexes and supplying chains reliability. This approach includes, firstly, the equation of the total logistics costs; secondly, the reliability evaluation model of a simple supply chain which is a reserved system with a renewal; thirdly, a complex of models for the evaluation of the reliability of basic logistics operations (purchase, order processing, choice of intermediaries, transportation, warehouse placement and storage). As most indicators which describe the chain functioning are random values, to obtain the required evaluations there is a developed algorithm based on simulation.