CALCULLATION INDICATORS OF RELIABLITYSTRUCTURAL ELEMENTS OF COMPLEX
SYSTEMS WITH FAULT LOGGING AND PARAMETER CHANGES

Grishko Aleksey Konstantinovich, candidate of technical sciences, associate professor, sub-department of radio equipment design and production, Penza State University (40 Krasnaya street, Penza, Russia), alexey-grishko@rambler.ru

621.396

Background. Design of radio-electronic means for various purposes are classified as complex systems and are characterized by a multilevel hierarchical structure in the form of separate units, blocks, modules. Because in the process of operation of the system is influenced by complex factors, reliability of complex systems depends on the reliability of the elements of the system and optimal distribution of values of indicators of reliability between elements of the system. The purpose of this article is to define the requirements of reliability of structural elements, with the possible gradual and catastrophic failure, and possible gradual changes of parameters of elements of the designed system. As the constraints is required to ensure the minimum cost for a given level of system reliability.
Materials and methods. The article uses methods of system analysis, reliability theory of complex systems and probability theory, taking into account the occurrence of failures and the processes of change parameters in the process of operation.
Results. As a result of this approach there is an opportunity to complement known methods and to obtain analytical expressions for solving design problems of reliability with regard to possible gradual and sudden failures, and possible gradual changes of parameters of elements of the designed system.
Conclusions. Developed a methodology for defining the requirements for reliability elements of complex technical systems is proposed to apply at early design stages, when the lack of information makes impossible to find the optimal distribution of norms of reliability of structural elements that provides the minimum total cost of the product. In addition, the method of determining the reliability of structural elements can be used to design highly reliable board radio systems for long functioning.

reliability, element, system parameters, unexpected failures, gradual failures.