RELIABILITY MODEL OF FAULT-TOLERANT SYSTEM BASED ON THE MAJORITY STRUCTURE {3 OF 5} WITH COMBINED STRUCTURAL REDUNDANCY AND MAINTENANCE
Journal Title: Вісник Національного університету "Львівська політехніка", серія "Радіоелектроніка та телекомунікації" - Year 2017, Vol 885, Issue 2017
Abstract
Designing of radio-electronic systems of responsible purpose with hardware-software implementation involves the mandatory provision of their property of fault-tolerance. The property of fault-tolerance are provided by the use of fault-tolerant systems. For these faulttolerant systems at the stage of system engineering design it is necessary to solve the problem of reliability structural-parametric synthesis. A designer must have a high degree of155 adequacy of reliability models of fault-tolerant systems with different configurations to solve such a task. Wide application for the design of radio electronic systems (RES) of responsible purpose with hardware and software implementation have fault-tolerant systems with majority structure. Fault-tolerant systems with a majority structure have many options for practical implementation. However, not all variants of their implementation have developed reliability models that are suitable for solving the problem of reliability structuralparametric synthesis. In the list of fault-tolerant systems with a majority structure, for which there are no models of the required degree of adequacy, includes a fault-tolerant system in which there are 5 RES in the core and the majority function works according to the rule {3 of 5}. The developed reliability model takes into account the technical implementation features described below. The suitability of a reliability fault-tolerant system model for solving the problem of reliability synthesis by the multivariate analysis determines the availability of computer support for the development of a reliability model and the solution to the problem of reliability analysis. The basis of technology development of reliability models is the method of developing models of discrete-continuous stochastic systems in the form of states diagram. Implementation of the method involves the development of a structural and automatic model of fault-tolerant system. In this paper, for a fault-tolerant system with a majority structure {3 of 5}, a developed supporting state diagram is presented and mathematical model is developed in the form of a system of Kolmogorov–Chapman differential equations.
Authors and Affiliations
Bohdan Volochiy, Vasyl Yakubenko, Mykhailo Zmysnyi
Keywords
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