CONSIDERATION OF SIGNIFICANT FACTORS AND LIMITATIONS IN THE STUDY AND DEVELOPMENT OF PASSIVELY RESERVED AIRCRAFT SUBSYSTEMS, TAKING INTO ACCOUNT TOLERANCES
Abstract
The relevance of this article is in the fact that the problem of increasing the reliability of the subsystems of aviation and rocket and space technology in case of sudden independent refusals determines one of the important areas of the scientific research. One of the ways to increase the reliability of subsystems is passive or, as it is also called, constant backup. And the important features of passive reservation structures are the impossibility of determining which elements are basic and which are redundant, since all elements are the same and work in the same conditions. The purpose of this work is to identify and analysis specific characteristics that must be considered to conduct research and develop subsystems of passive redundancy in consideration of fault tolerance. In the course of the study, calculations were carried out using the methods of probability, enumeration, analysis and synthesis of passively reserved aircraft subsystems were carried out taking into account tolerances. It is shown that it is necessary to take into account assigned and implemented tolerance, multiple and non-multiple redundancy, discrete scales of realized tolerances with different levels of significance, critical probabilities that determine the probability ranges of elements, where the redundancy is profitable or unprofitable. It has been established that passive redundancy taking into account the implemented tolerances is provided in two fundamentally different ways. The possibility of realizing any tolerance for different values of a number of increasing individual multiplicities is revealed. It is shown that the subsystems with non-multiple passive reservation have the probabilities of the elements, called critical. A different pattern of variation of critical probabilities is revealed depending on the multiplicities for different values of the tolerances to be realized.
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