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논문 상세정보

Abstract

Korea Aerospace Research Institute (KARI) is developing an electric-driven HALE UAV in order to secure system and operational technologies since 2010. Based on the 5 years of flight tests and design experiences of the previously developed electric-driven UAVs, KARI has designed EAV-3, a solar-powered HALE UAV. EAV-3 weighs 53 kg, the structure weight is 21 kg, and features a flexible wing of 19.5 m in span with the aspect ratio of 17.4. Designing the main wing and empennage of the EAV-3 the amount of the bending due to the flexible wing, 404 mm at 1-G flight condition based on T-800 composite material, and side wind effects due to low cruise speed, V_cr = 6 m/sec, are carefully considered. Also, unlike the general aircraft there is no center of gravity shift during the flight. Thus, the static margin cuts down to 28.4% and center of gravity moves back to 31% of the Mean Aerodynamic Chord (MAC) comparing to the previously developed scale-down HALE UAVs, EAV-2 and EAV-2H, to minimize a trim drag and enhance a performance of the EAV-3. The first flight of the EAV-3 has successfully conducted on the July 29, 2015 and the test flight above the altitude 14 km has efficiently achieved on the August 5, 2015 at the Goheung aviation center.

참고문헌 (10)

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  3. Korea Aerospace Research Institute, January 2011, "System and Operational Technology Research for Electric Airplane (I)" 
  4. W. Jin, Y. Lee, C. Kim, and S. Ahn, "Initial Design and Computational Aerodynamic Analysis of a Medium Electric Aerial Vehicle," Proceeding of the 2011 Korean Society for Aeronautical & Space Sciences (KSAS) Spring Conference, vol. 1., pp. 850-855. 
  5. Korea Aerospace Research Institute, January 2012, "System and Operational Technology Research for Electric Airplane (II)" 
  6. Korea Aerospace Research Institute, January 2013, "System and Operational Technology Research for Electric Airplane (III)" 
  7. J. Roskam, 2004, "Airplane Design Part III: Layout Design of Cockpit, Fuselage, Wing and Empennage: Cutways and Inboard Profiles," DARCorp., Lawrence, KS, USA. 
  8. J. Roskam, 2004, "Airplane Design Part VII: Determination of Stability, Control and Performance Characteristics: FAR and Military Requirements," DARCorp., Lawrence, KS, USA. 
  9. Hanseok Ryu, Heejae Byun and Sanghyuk Park, "Efficient Path Planning for Long Term Solar UAV Flight," Journal of the Society for Aerospace System Engineering, vol. 8, No. 4, pp. 32-38, December, 2014. 
  10. Hyun-Su Hwang, Seop Heo, Jong-Hyuk Kim and Jae-Sung Bae, "Aircraft Design and Manufacturing for UAV," Journal of the Society for Aerospace System Engineering, vol. 2, No. 4, pp. 38-43, December, 2008. 

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