Comparison of strategies of preventive and corrective maintenance of uninterruptible power supply

Authors

DOI:

https://doi.org/10.20535/RADAP.2013.54.111-119

Keywords:

uninterruptible power supply, , mixed redundancy, fault-tolerant system

Abstract

Introduction. The comparison of the reliability of two variants of the fault-tolerant N+M redundant configurations for uninterruptible power supply with corrective and preventive maintenance is given in this paper. Formulation of the problem. Different variants of fault-tolerant redundant configurations and maintenance strategies provide equivalent mean time to failure indexes, but at the same time have different values of the probability of failure-free operation at given operation time value.
Description of object under consideration. Fault-tolerant system consists of main and hot reserve modules and has two accumulator batteries.
Reliability model for fault-tolerant system with N+M redundant configuration. Carrying out this research was made possible after the development of models of fault-tolerant systems as Kolmogorov - Chapman differential equation systems. Comparison of the reliability of uninterruptible power supply with different fault-tolerant configurations. There is shown quantitative difference between reliability indexes (operation time where probability of failure-free operation is not less than 0.99) of corrective and preventive maintenance. Conclusions. Reliability analysis of fault-tolerant systems shows that the strategy of corrective maintenance has higher values of operation time where probability of failure-free operation is not less than 0.99.

Author Biographies

B. Y. Volochiy, Lviv Polytechnic National University, Lviv

Doc. of Sci (Techn), Prof.

D. S. Kuznetsov, Lviv Polytechnic National University, Lviv

Postgraduate student

References

Література

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How to Cite

Волочій, Б. and Кузнєцов, Д. (2013) “Comparison of strategies of preventive and corrective maintenance of uninterruptible power supply”, Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, 0(54), pp. 111-119. doi: 10.20535/RADAP.2013.54.111-119.

Issue

No. 54 (2013)

Section

Designing of Radio Equipment

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