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Confidence limits for the reliability index of a system
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Engineering Journal: Science and Innovation
# 1·2018 11
Confidence limits for the reliability index of a system
featuring dual modular redundancy of various subsystem
components
© I.V. Pavlov, M.M. Tedeluri
Bauman Moscow State Technical University, Moscow, 105005, Russia
The article deals with a topical applied and theoretical problem of confidence estimation
of reliability indices for complex systems, based on the results of testing their compo-
nents, such as elements or subsystems, separately. We consider a model of a system fea-
turing full or partial component redundancy in various subsystems for the case of hot
redundancy. For the case of high component reliability we supply an approximate solu-
tion to the problem of using the results of system component testing to plot the bottom
confidence limit for one of the main reliability indices, namely time between failures of
this system guaranteed by a predefined validity equation. We also obtained a solution to
the problem of determining the extent of testing various subsystem elements that is neces-
sary to validate the desired requirements for the system reliability index. As a conclusion,
we present examples of numerically computing confidence limits based on the expressions
derived for the system reliability index.
Keywords:
reliability, system, system structure, confidence limits
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