Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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A Study on the Reliability Growth of Multiple Launch Rocket System Using Accelerated Life Testing

가속수명시험을 이용한 다련장 발사대 신뢰도 성장 연구

  • Lee, Yongjun (Land Systems Center, Defense Agency for Technology and Quality) ;
  • Ryu, Jeongmin (Land Systems Center, Defense Agency for Technology and Quality) ;
  • Son, Kwonil (Land Systems Center, Defense Agency for Technology and Quality) ;
  • Song, Seokbong (Land Systems Center, Defense Agency for Technology and Quality) ;
  • Kim, Sangboo (School of Industrial Engineering and Naval Architecture, Changwon National University) ;
  • Park, Woojae (School of Industrial Engineering and Naval Architecture, Changwon National University)
  • 이용준 (국방기술품질원 기동화력센터) ;
  • 류정민 (국방기술품질원 기동화력센터) ;
  • 손권일 (국방기술품질원 기동화력센터) ;
  • 송석봉 (국방기술품질원 기동화력센터) ;
  • 김상부 (창원대학교 산업조선해양공학부) ;
  • 박우재 (창원대학교 산업조선해양공학부)
  • Received : 2018.09.19
  • Accepted : 2019.02.08
  • Published : 2019.04.05
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Abstract

In this paper, we aim to check the reliability growth of multiple launch rocket components by the life evaluation. We apply the Crow-AMSAA model to the sets of test data obtained from the development phase. The result of the data analysis shows that the reliability of some components needs to be improved. In order to improve their reliability, we analyze the failure mechanism and change their designs. The verification of the reliability growth for those components is done by analyzing the data sets obtained by the accelerated life tests. As a result, we show that the MTBF of those components is increased and also their reliabilities improved.

Keywords

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Fig. 1. Estimated MTBF based on OT failure data

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Fig. 2. Failure intensity functions based on OT failure data

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Fig. 3. Estimated MTBF based on FT failure data

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Fig. 4. Failure intensity functions based on FT failure data

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Fig. 5. Diaphragm damage area

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Fig. 6. Relay circuit on the fire control computer

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Fig. 7. The circuit with the diode connections

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Fig. 8. The test configuration for the pressure switch

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Fig. 9. Parameter(ƞ, β) estimation for accelerated life data of the hydaulic motor

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Fig. 10. The test configuration for the relay circuit

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Fig. 11. Parameter(ƞ, β) estimation for accelerated life data of the fire control computer

Table 1. Summary of failure data

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Table 2. Results of launcher system OT failure data analysis

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Table 3. Results of launcher system FT failure data analysis

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Table 4. The result of the accelerated life test for the hydraulic motor(Cycles)

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Table 5. The result of the accelerated life test for the fire control computer(Cycles)

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References

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  2. J. Ko, S. K. Lee, S. Kwon, S. Noh, T. Chung, C. Park and M. Kim, “Reliability Growth Program,” Journal of Applied Reliability, Vol. 6, No. 1, pp. 13-25, 2006.
  3. Y. J. Lee, G. B. Bae, Y. M. Heo, J. H. Seo, S. B. Kim, J. K. Choi and W. J. Park, “Reliability Growth Management for Armed Vehicle : Launcher System Case Study,” Journal of the Korean Society for Quality Management, Vol. 45, No. 4, pp. 981-994, 2017. https://doi.org/10.7469/JKSQM.2017.45.4.981
  4. MIL-HDBK-189C, Reliability Growth Management, Department of Defense, 2011.
  5. W. Nelson, "Accelerated Testing - Statistical Models, Test Plans, and Data Analysis," Wiley, New York, 1990.