Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Preliminary Study on Development of Length-Variable Rotor Blade for Unmanned Helicopter

무인 헬리콥터용 길이가변 로터 블레이드 개발을 위한 선행연구

  • Chun, Ju-Hong (Department of Aerospace Engineering, Pusan National Univ.) ;
  • Byun, Young-Seop (Department of Aerospace Engineering, Pusan National Univ.) ;
  • Lee, Byoung-Eon (Department of Aerospace Engineering, Pusan National Univ.) ;
  • Song, Woo-Jin (Department of Industrial Liaison Innovation Center, Pusan National Univ.) ;
  • Kim, Jeong (Department of Aerospace Engineering, Pusan National Univ.) ;
  • Kang, Beom-Soo (Department of Aerospace Engineering, Pusan National Univ.)
  • 천주홍 (부산대학교 항공우주공학과) ;
  • 변영섭 (부산대학교 항공우주공학과) ;
  • 이병언 (부산대학교 항공우주공학과) ;
  • 송우진 (부산대학교 부품소재산학협력연구소) ;
  • 김정 (부산대학교 항공우주공학과) ;
  • 강범수 (부산대학교 항공우주공학과)
  • Published : 2010.03.01
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Abstract

A preliminary study on a length-variable rotor blade for a small unmanned helicopter has been conducted. After surveys on previous researches, and examining requirements for application to a small unmanned helicopter, a length-variable rotor blade was designed and manufactured to be driven by centrifugal force from rotor revolution with no mechanical actuator. The rotor blade was divided into a fixed inboard section and an outboard section sliding in span-wise direction. In order to determine the operating conditions of the length-variable rotor during revolution, and to derive the design variables of extension spring and rotor weight, a series of analyses from multi-body dynamics solution were conducted. The manufactured prototype was verified of its length-varying mechanism from a rotor stand, the results and required future improvements are discussed.

Keywords

References

  1. Kim, S. D., Byun, Y. S., Song, J. B., Lee, B. E., Song, W. J., Kim, J. and Kang, B. S., "Design and Fabrication of a small Coaxial Rotorcraft UAV," J. of KSAS, Vol. 37, No. 3, pp. 293-300, 2009.
  2. UAS Dept. of Defense, "Unmanned Aircraft Roadmap 2005-2030," 2005.
  3. Byun, Y. S., Song, W. J., Kim, J. and Kang, B. S., "A Preliminary Study on Conceptual Design of a Coaxial Rotorcraft UAV for Teaming Operation with UGV," 2nd IFRMT Conference, 2009.
  4. Rodriguez, A. R., "Morphing Aircraft Technology Survey," 45th AIAA Aerospace Sciences Meeting and Exhibit, Paper No. AIAA 2007-1258, 2007.
  5. Fradenburgh, E. A., Hager, L. N. and Keffort, N. F. K., "Evaluation of the TRAC Variable Diameter Rotor: Preliminary Design of a Full-Scale Rotor and Parametric Mission Analysis Comparisons," USAAMRDL Technical Report 75-54, 1976.
  6. Fradenburgh, E. A. and Matuska, D., "Advancing Tiltrotor State of-the-Art With Variable Diameter Rotors," 48th Annual Forum of American Helicopter Society, 1992.
  7. Johnson, W., Yamauchi, G. K. and Watts, M. E., "NASA Heavy Lift Rotorcraft Systems Investigation," Society of Automotive Engineers transactions, Vol. 114, No. 1, pp. 688-716, 2005.
  8. Scott, B., Mark, H. and Aguilera, F., "The Attributes of a Variable-Diameter Rotor System Applied to Civil Tiltrotor Aircraft," NASA-CR-203092, 1996.
  9. Segel, R. M. and Fradenburgh, E. A., "Development of the Trac Variable Diameter Rotor Concept," AIAA Paper, 1969.
  10. Prabhakar T., Gandhi F., Steiner J. and McLaughlin, D., "A Centifugal Force Actuated Variable Span Morphing Helicopter Rotor," 63th Annual Forum of American Helicopter Society, 2007.
  11. Norton, R. L., "Machine Design-An Itergrated Approach(3th Ed.)," Pearson, pp. 772-784, 2006.
  12. MISUMI Corporation, "Mechanical Standard Parts Catalogue for FA," pp. 1425-1428, 2008.
  13. Lee, B. E., Seo, J. W., Byun, Y. S., Kim, J., Yee, K. J. and Kang, B. S., "Development and Verification of Small-Scale Rotor Hover Performance Test-stand," J. of KSAS, Vol. 37, No. 10, pp. 975-983, 2009.