Journal of Applied Reliability (한국신뢰성학회지:신뢰성응용연구)

The Korean Reliability Society (한국신뢰성학회)
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Analysis of Operational Availability under Changing Failure Rate and Supportability

무기체계의 고장률과 지원수준의 변화에 따른 운용가용도 변화 분석

  • Tak, Jung Ho (Department of Industrial and Management Engineering Daegu University) ;
  • Jung, Won (Department of Industrial and Management Engineering Daegu University)
  • 탁정호 (대구대학교 산업경영공학과) ;
  • 정원 (대구대학교 산업경영공학과)
  • Received : 2017.08.31
  • Accepted : 2018.01.12
  • Published : 2018.03.25
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Abstract

Purpose: Maintaining appropriate operational availability (Ao) is a key element of combat victory, but estimates vary according to estimation methods. The purpose of this study is to improve the accuracy of estimating operational availability by tracing the changes of the weapon system's failure rate, repair rate, and the level of logistic support. Methods: In order to track the change in the operating availability, the MDT (mean down time) is modeled by adding the repair time and the ALDT (administration and logistic delay time) to the service time. Results: Using the field data of the weapon system A operated by the ROKAF, the failure rate follows a non-homogeneous Poisson process that changes with time, and it is modeled considering the changing repair rate and the logistic support time. Conclusion: The accuracy of the analytical results was verified by comparing the actual operating data with the estimated availability. The results of this study can be used to track and evaluate the availability in a realistic situation where the failure rate and maintenance rate continuously change in operating environment.

Keywords

References

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