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A Study on Shelf-life Management Program of Long-term Storage One-shot System

장기 저장되는 일회성 시스템의 수명 관리 프로그램에 대한 연구

  • 박동인 ((주)한화 종합연구소 ILS센터) ;
  • 심행근 ((주)한화 종합연구소 ILS센터)
  • Received : 2019.09.19
  • Accepted : 2020.01.03
  • Published : 2020.01.31

Abstract

This paper presents an analysis of the shelf-life management program of the long-term storage one-shot system. The one-shot system is mainly maintained with long-term storage or non-operating status and is operated once at execution of the mission. The function corresponding to one-shot is mainly operated through a shelf-life item such as an explosive. The performance and characteristics of shelf-life item are subject to change as the storage period passes. Therefore, shelf-life management for maintaining good condition is very important during long-term storage, and criteria for management is necessary. We present a method for optimizing shelf-life extension by comparing criteria for management with current reliability. Next, the shelf-life evaluation schedule was decided by utilizing the reliability function of exponential distribution and Weibull distribution. Continuously accumulated test data from the shelf-life evaluation were analyzed, and the parameter of distribution was updated. The extension or expiration of shelf-life was selected by monitoring changes in reliability. In addition, we confirmed the applicability of the presented shelf-life management program by applying ASRP test data of the one-shot system K000 fuse.

본 논문에서는 일회성 시스템이 장기 저장되는 동안 수명을 관리하기 위한 프로그램에 대해 연구하였다. 일회성 시스템은 주로 장기간 저장 또는 비운용 상태로 유지되다 임무수행시 일회성으로 운용되는 특징이 있으며, 일회성에 해당하는 기능은 주로 화약과 같은 시효성 품목을 통해 발휘된다. 이러한 시효성 품목은 저장 기간이 경과됨에 따라 성능과 특성이 변화하는 품목으로서 장기 저장간 정상 상태를 유지하기 위한 수명 관리가 매우 중요하며, 체계적인 수명 관리를 위해서는 관리 기준 설정이 필요하다. 수명 관리 기준과 현재 신뢰도를 비교하여 수명연장을 결정하며, 차기 수명평가 시기를 결정하는 방법을 지수분포와 와이블분포별로 제시한다. 수명평가 결과 시험데이터를 지속적으로 누적하며 수명분포의 모수를 최신화하고 신뢰도 변화를 확인하여, 수명을 연장하거나 만료를 판정한다. 또한, 일회성 시스템인 K000 신관의 ASRP 시험데이터를 활용하여 제안된 수명 관리 프로그램에 따라 수명 관리가 어떻게 이뤄지게 되는지 적용 가능성을 확인하였다.

Keywords

References

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