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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References

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Volochіy B.Yu. Tekhnologіia modeliuvannia algorytmіv povedіnky іnformatsіinykh system – Lviv: Vyd-vo Natsionalnoho Universytetu "Lvivska Politekhnika", 2004. – 220 c.

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Volochіy B.Yu. Proektuvannia vіdmovostіikykh system z konfіguratsіiamy N+M ta 2×(N+M) dlya dzherel bezperebіinogo elektrozhyvlennia / B.Yu. Volochіy, D.S. Kuznetsov // Radіoelektronіka ta telekomunіkatsіi. Vіsnyk NU «Lvіvska polіtekhnіka» № 738. – L'vіv: Vyd-vo Natsionalnoho Universytetu «Lvіvska polіtehnіka», 2012. – S. 216 - 222.

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Issue

No. 54 (2013)

Section

Designing of Radio Equipment

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How to Cite

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

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