Browse > Article
http://dx.doi.org/10.5307/JBE.2008.33.1.014

Centrifugal Clutch Design for an Unmanned Helicopter - Theoretical Analysis of Power Transfer -  

Lee, J.H. (Dept. of Bio-industrial Machinery Engineering, Kyungpook National University)
Koo, Y.M. (Dept. of Bio-industrial Machinery Engineering, Kyungpook National University)
Shin, S.K. (Dept. of Bio-industrial Machinery Engineering, Kyungpook National University)
Publication Information
Journal of Biosystems Engineering / v.33, no.1, 2008 , pp. 14-20 More about this Journal
Abstract
An agricultural unmanned helicopter was suggested for an alternative to current pesticide application methods to solve such problems as high cost, low efficiency, shirking task and unsafe work. To pursuit this trend, researches on the development of unmanned helicopters have been accelerated in Korea as well. In this research, a guide type centrifugal clutch that plays an important role in the unmanned helicopter was studied. Theoretical analyses and experimental tests were conducted for designing an optimal clutches. Main design factors of the guide type centrifugal clutch were found to be spring constant, free length of spring, mass of friction sector, contact area, allowable pressure, number of friction sector, friction coefficient, radius of drum, and clutch arrangement. And these design factors could be the functions of engaging engine speed and desired power transfer capacity. The result of the single clutch test showed the power transfer capacity of 14.1 PS at 5,800 rpm and the result of the dual clutch test showed that the capacity of 17.7 PS at 5,600 rpm. These experimental results agreed well the theoretical simulations.
Keywords
Unmanned helicopter; Friction clutch; Centrifugal clutch; Torque transfer capacity; Power transfer capacity;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 St. John, R. C. 1979. Centrifugal clutch basics. Power Transmission Design 21(3):52-55
2 이재홍. 2008. 농용무인헬리콥터의 가이드형 원심크러치 설계, 석사학위논문.경북대학교,대구
3 최경진,이동형,이회성,송문석,신유정.2003.답면 브레이크 슈의 마찰계수와 제동성능향상을 위한 평가기술. 한국철도학 회 2003년도 추계학술대회논문집(III) pp. 377-382
4 농업공학연구소. 고시 제2007-1호. 2007. 농업기계 검정.검사 및 안전장치확인요령
5 Koo, Y. M., C. S. Lee, T. S. Soek, S. K. Shin, T. G. Kang, S. H. Kim and T. Y. Choi. 2006. Aerial application using a small RF controlled helicopter (I) -status and cost analysis-. Journal of Biosystems Engineering 31(2):95-101. (In Korean)   과학기술학회마을   DOI   ScienceOn
6 Soek, T. S., Y. M. Koo, C. S. Lee, S. K. Shin, T. G. Kang and S.H. Kim. 2006. Aerial application using a small RF controlled helicopter (II) -development of power unit-. Journal of Biosystems Engineering 31(2):102-107. (In Korean)   과학기술학회마을   DOI   ScienceOn
7 Weight, R. G. 2004. High-torque Capacity Compliant Centrifugal Clutches. M. S. Thesis, Brigham Young University, Provo, Utah, USA
8 조홍기. 2004. 담수직파재배 경제성 분석. 농림과학기술대전. 농림부,과천
9 이수갑, 최기영, 장세명(S. Newman 원저). 2003. 헬리콥터공 학.도서출판인터비젼,서울