DOI QR코드

DOI QR Code

Development of KAU Mechanical Lunar Simulants and Drop Test of Lunar Landing Gears

KAU 기계적 달 복제토 개발 및 달착륙선 착륙장치의 낙하시험

  • Yoo, Seok-Ho (Department of Aerospace and Mechanical Engineering, Graduate School at Korea Aerospace University) ;
  • Kim, Hyun-Duk (Department of Aerospace and Mechanical Engineering, Graduate School at Korea Aerospace University) ;
  • Lim, Jae Hyuk (Korea Aerospace Research Institute, Satellite Structure Team) ;
  • Park, Jung-Sun (Department of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • Received : 2014.08.08
  • Accepted : 2014.10.28
  • Published : 2014.12.01

Abstract

In this study, we designed a drop test system considering lunar surface environment and tested landing gear of experimental lunar lander. The lunar lander would be landed at soil place for soft landing. When the lunar lander touches down, the acceleration of the lander is largely affected by mechanical characteristics of the lunar soil. Accordingly, a drop test using lunar soil is needed to verify the performance of the lunar landing gear. Because the lunar soil is not available generally, we developed a lunar simulant KAUMLS(Korea Aerospace University Mechanical Luna Simulant) based on mechanical properties of the lunar soil of NASA's LUNA PROJECT. In addition, drop tests on steel plate and dry sand are performed to evaluate impact characteristics by the surface environment.

연구에서는 달환경을 고려한 달착륙선 충격흡수장치의 시험장치 구성 및 시험을 수행하였다. 달착륙선은 착륙 시 충격 완화를 위하여 토양이 있는 지역을 착륙지점으로 선정한다. 착륙 시 발생하는 달착륙선의 가속도는 착지면의 특성의 영향을 받아 결정된다. 달착륙선의 충격흡수장치의 시험에서 달 토양을 직접 사용할 수 없기 때문에, 복제토를 사용하여 착륙시험을 수행해야 한다. 본 연구에서는 NASA의 달탐사 프로젝트를 통해 획득된 달 토양의 정보를 기반으로 달 토양과 기계적 성질이 유사한 달 복제토 KAUMLS를 개발하여 달착륙선 충격흡수장치의 낙하시험을 수행하였으며, 지면특성에 따른 충격특성 분석을 위하여 단단한 철판과 건조된 모래위에서의 낙하시험을 수행하였다.

Keywords

References

  1. Kim, H. D., Lee, H. H., Kim, S., Park, J. S., Kim, S. W., Lim, J. H., and Hwang, D. S., "Design of the KAU Lunar for shock Absorption Structure Test," Proceedings of the 2010 KASA Fall Conference, pp.837-840, 2010.
  2. Rongquang L., Changjie L., Zongqun D., and Chuang W., "Design and Selection of Aluminum Foam for Impact Damper of Legged Lunar Lander," IEEE, 2008.
  3. Scott, R. F., and F. I. Roberson, Soil mechanics surface sampler, Surveyor Program Results, NASA SP-184, Wash., DC, 1969.
  4. Lim, J. H., Kim, K. W., Jeon, J. H., Son, T. J., Lee, M. S., Kim, A. H., and Hwang, D. S., "An Analysis on Drop Test Results of the Landing Gear of Korean Lunar Lander's Demonstrator," Proceedings of the 2012 KASA Fall Conference, pp. 179-183, 2012.
  5. ESA-NEXT Team, "Next Lunar Lander with in-situ science and mobility: Phase A Mission Study, Lunar Environment Specification," NEXT-LLLES-ESA (HME)-0001, 2008.
  6. Hill, E., Mellin, M. J., Deane, B., Liu, Y., and Taylor, L. A. "Apollo sample 70051 and high and low-Ti lunar soil simulants MLS-1A and JSC-1A: Implications for future lunar exploration," Journal of Geophysical Research, vol 112 issue E2, pp.1991-2012 2007.
  7. Ko, S. W., Jang, B. C., Koo, J. K., and Lee, T. S., "Study for Korea Lunar Simulant Prototype Development," KSCE 2009 Convention, pp.3598-3601, 2009.

Cited by

  1. Basic Study for a Korean Lunar Simulant (KLS-1) Development vol.31, pp.7, 2015, https://doi.org/10.7843/kgs.2015.31.7.53
  2. Estimation of the saw-tooth shock wave using a lead shock programmer vol.30, pp.5, 2016, https://doi.org/10.1007/s12206-016-0420-2