• Title/Summary/Keyword: 비상위치송신장치

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Numerical Study of Drop/impact test and Shock/impact Survivability Test for ELT(Emergency Locator Transmitter) Operations (ELT(Emergency Locator Transmitter) 운용을 위한 낙하 충격 및 추락생존성 시험에 대한 수치 해석적 연구)

  • Jung, Do-Hee;Baek, Jong-Jin
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.36 no.12
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    • pp.1229-1235
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    • 2008
  • ELT(emergency locator transmitter) has assisted in the rescue of thousands of lives in distress. Aviators, mariners and land users being equipped with distress beacons are capable of transmitting distress signals to the satellites in emergency situations anywhere in the world. In this paper, Drop/Impact simulation was performed for ELT Body-case. FE model for Body-case was constructed with MSC/Dytran and refined using the Karas example simulation for Body-case prototype. Shock/impact survivability analysis was performed for ELT operations. FE model constructed with MSC/Nastran. Transient response analysis for refined ELT model was perfomed for ELT under impact shock loading condition.

Development and Verification of ELT System Using the MEMS Accelerometer (MEMS 가속도계를 적용한 ELT 시스템 개발과 검증)

  • Lee, Sang-Chul;Lee, Dong-Kyu;Kang, Ja-Young
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.38 no.3
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    • pp.294-299
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    • 2010
  • ELT(Emergency Locator Transmitter) is used to send distress signal in the event of an aircraft crash. It is very useful but the ELT may transmit wrong signal caused by misjudging between crash and hard-landing. The reason of this problem is the low accuracy of the mechanical G-switch currently in use. To improve the ELT, we developed an ELT system using the MEMS(Micro Electro-Mechanical Sensor) accelerometer. The ELT system consists of acceleration data acquisition/analysis system, program of crash recognition, and GPS receiving system for the position information of an aircraft crash site. A free-drop table was developed for verification of the ELT system. The free-drop table was designed to replicate the acceleration and the pulse duration of the hard landing and the crash. By using the free-drop table, we showed that the ELT system performed well.