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

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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Measurement-based LEEFI Modeling and Experimental Verification for Predicting Firing Waveform of an ESAD

ESAD의 기폭 파형 예측을 위한 측정기반 LEEFI 모델링 및 검증

  • Kang, Hyungmin (Division of Future Vehicle, Korea Advanced Institute of Science and Technology) ;
  • Kim, Joungho (School of Electrical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Hwang, Sukhyun (The 4th Research and Development Institute, Agency for Defense Development) ;
  • Jung, Myung-suk (The 4th Research and Development Institute, Agency for Defense Development) ;
  • Jo, Seyoung (The 4th Research and Development Institute, Agency for Defense Development) ;
  • Son, Joongtak (The 4th Research and Development Institute, Agency for Defense Development)
  • 강형민 (한국과학기술원 미래자동차학제전공) ;
  • 김정호 (한국과학기술원 전기 및 전자공학부) ;
  • 황석현 (국방과학연구소 제4기술연구본부) ;
  • 정명숙 (국방과학연구소 제4기술연구본부) ;
  • 조세영 (국방과학연구소 제4기술연구본부) ;
  • 손중탁 (국방과학연구소 제4기술연구본부)
  • Received : 2018.09.04
  • Accepted : 2019.01.25
  • Published : 2019.02.05
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Abstract

In this paper, we propose measurement based numerical resistivity model for low energy exploding foil initiator (LEEFI) of electronic safety and arming device(ESAD). A resistivity model describes a behavior of variable resistance in LEEFI by firing current. The previous resistivity model was based on high energy detonator applications as explosive bridge wire and exploding foil initiator. Therefore, to estimate the voltage, current, and burst time of LEEFI, a resistivity model suitable for LEEFI is needed. For the modeling of resistivity of LEEFI, we propose a specific action based equation which represents a behavior of LEEFI when firing current is applied. To verify the proposed model, we analyze a firing current transmission path to obtain parasitic impedance. We experimentally verify that the proposed resistivity model offers precise estimation for the behavior of variable resistance in LEEFI.

Keywords

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Fig. 1. Equivalent circuit of the firing current path

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Fig. 2. Measurement setup for firing test

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Fig. 3. Measured current and voltage waveform of the LEEFI

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Fig. 4. Relationship of the specific action and the proposed resistivity model

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Fig. 5. Calculated parasitic inductance and resistance: (a) Inductance, (b) Resistance

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Fig. 6. Experimental verification of the calculated parasitic impedance

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Fig. 7. Experimental verification of the proposed resistivity model for specific action

Table 1. Specific action at burst time

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References

  1. Seyoung Cho and Jungtak Son, "A Study of the Firing Test Method for the ESAF," 3rd New Special Energy Weapon Conference, Vol. 3, pp. 256-259, 2012.
  2. R. S. Lee, "Fireset," Lawrence Livermore National Laboratory, USA, UCID-21322, February 1988.
  3. R. S. Lee, "An Analytical Model for the Dynamic Resistivity of Electrically Exploded Conductors," Proceedings of the 13th Symposium on Explosives and Pyrotechnics, Arvin/Calspan, Franklin Research Center, Philadelphia, PA, p. 131, 1986.
  4. R. S. Lee and R. E. Lee, "Electrostatic Discharge Effects on EBW Detonators," Lawrence Livermore National Laboratory, USA, UCRL-ID-105644, 1994,
  5. Nappert. L., "An Exploding Foil Initiator System," DREV-R-9502, March 1996.