[1] ROBB R L. Hybrid helicopters:Compounding the quest for speed[J]. Vertiflite, 2006, 52(2):30-54.
[2] ORMISTON R A. Low-disk loading compound rotorcraft for high speed and aerodynamic efficiency[C]//AHS, AIAA, SAE, RAeS International Powered Lift Conference. Philadelphia, PA:AHS, 2010:265-287.
[3] SPREUER W E. Experimental flight tests of the XH-51A compound helicopter[J]. Journal of the American Helicopter Society, 1968, 13(3):64-69.
[4] BAGAI A. Aerodynamic design of the X2 technology demonstratorTM main rotor blade[C]//64th American Helicopter Society International Annual Forum. Philadelphia, PA:AHS, 2008:1575-1590.
[5] BLACKWELL R, MILLOTT T. Dynamics design characteristics of the sikorsky X2 technologyTM demonstrator aircraft[C]//64th American Helicopter Society International Annual Forum. Philadelphia, PA:AHS, 2008:1274-1286.
[6] COLUCCI F. Hummingbird hunts for a home[J]. Vertiflite, 2008, 54(3):20-23.
[7] KANG H, SABERI H, GANDHI F. Dynamic blade shape for improved helicopter rotor performance[J]. Journal of the American Helicopter Society, 2010, 55(3):32008(1)-32008(12).
[8] STEINER J, GANDHI F, YOSHIZAKE Y. An investigation of variable rotor rpm on performance and trim[C]//64th American Helicopter Society International Annual Forum. Philadelphia, PA:AHS, 2008:1980-1988.
[9] SCHAEFER C G, LUTZE F H. Enhanced energy maneuverability for attack helicopters using continuous, variable(C-V) rotor speed control[C]//47th American Helicopter Society International Annual Forum. Philadelphia, PA:AHS, 1991:1213-1223.
[10] IWATA T, ROCK S M. Benefits of variable rotor speed in integrated helicopter/engine control[C]//AIAA Guidance, Navigation and Control Conference. Reston:AIAA, 1993:1342-1348.
[11] CHEN R T N. An exploratory investigation of the flight dynamics effects of rotor rpm variations and rotor state feedback in hover:NASA-TM-103968[R]. Washington, D.C.:NASA, 1992.
[12] FLOROS M W, JOHNSON W. Performance analysis of the slowed-rotor compound helicopter configuration[J]. Journal of the American Helicopter Society, 2009, 54(2):22002(1)-22002(12).
[13] DATTA A, YEO H, NORMAN T R. Experimental investigation and fundamental understanding of a slowed UH-60A rotor at high advance ratios[C]//67th American Helicopter Society International Annual Forum. Philadelphia, PA:AHS, 2011:1105-1130.
[14] DATTA A, YEO H, NORMAN T R. Experimental investigation and fundamental understanding of a full-scale slowed rotor at high advance ratios[J]. Journal of the American Helicopter Society, 2013, 58(2):1-17.
[15] BERRY B, CHOPRA I. Wind tunnel testing for performance and vibratory loads of a variable-speed Mach-scale rotor[C]//67th American Helicopter Society International Annual Forum. Philadelphia, PA:AHS, 2011:1227-1240.
[16] BOWEN-DAVIES G, CHOPRA I. Aeromechanics of a variable-speed rotor[C]//67th American Helicopter Society International Annual Forum. Philadelphia, PA:AHS, 2011:1058-1073.
[17] HAN D, WANG J, SMITH E C, et al. Transient loads control of a variable speed rotor during lagwise resonance crossing[J]. AIAA Journal, 2012, 51(1):20-29.
[18] HAN D, SMITH E C. Lagwise dynamic analysis of a variable speed rotor[J]. Aerospace Science and Technology, 2013, 29(1):277-286.
[19] HAN D, SMITH E C, RAHN C D. Pitch link loads analysis of a variable speed rotor[C]//67th American Helicopter Society International Annual Forum. Philadelphia, PA:AHS, 2011:1173-1180.
[20] 韩东. 变转速旋翼直升机性能及配平研究[J]. 航空学报, 2013, 34(6):1241-1248. HAN D. Study on the performance and trim of helicopters with variable speed rotors[J]. Acta Aeronautica et Astronautica Sinica, 2013, 34(6):1241-1248(in Chinese).
[21] 韩东. 变转速旋翼桨叶载荷研究[C]//2013年首届中国航空科学技术大会论文集. 北京:中国航空学会, 2013:1-8. HAN D. Blade loads analysis of a variable speed rotor[C]//Symposium of the First China Aviation Science and Technology Conference. Beijing:Chinese Society of Aeronautics and Astronatutics, 2013:1-8(in Chinese).
[22] 徐明, 韩东, 李建波. 变转速旋翼气动特性分析及试验研究[J]. 航空学报, 2013, 34(9):2047-2056. XU M, HAN D, LI J B. Analysis and experimental investigation on the aerodynamic characteristics of variable speed rotor[J]. Acta Aeronautica et Astronautica Sinica, 2013, 34(9):2047-2056(in Chinese). |