Higher harmonic control for helicopters with two-bladed and four-bladed rotors

Journal of Aircraft

Volumn 18, Issue 12, 1981, Pages 1064-1069

  Yen, Jing G ^a,b  

^a BELL HELICOPTER TEXTRON INC   (United States)

^b Flight Technology   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

HELICOPTERS;

EID: 0019703289     PISSN: 00218669     EISSN: None     Source Type: Journal    
DOI: 10.2514/3.57601     Document Type: Article

References (15)

1. Wernicke, R.K. and Drees, J. M., “Second Harmonic Control,” Proceedings of the American Helicopter Society, Inc., 19th Annual National Forum, Washington, D.C., May 1963, pp. 1-7.
2. Daughaday, H., “Suppression of Transmitted Harmonic Rotor Loads by Blade Pitch Control,” USAAVLABS TR 67-14, Nov. 1967.
3. Balcerak, J.C. and Erickson, J.C. Jr., “Suppression of Transmitted Harmonic Vertical and In-plane Rotor Loads by Blade Pitch Control,” USAAVLABS TR-69-39, July 1969.
4. McCloud, J.L. Ill, “An Analytical Study of a Multicyclic Controllable Twist Rotor,” AHS Preprint No. 932, presented at the 31st Annual National Forum of American Helicopter Society, Washington, D.C., May 1975.
5. Shaw, J. Jr., “Higher-Harmonic Blade Pitch Control for Helicopter Vibration Reduction: A Feasibility Study,” ASRL TR 1501, Aeroelastic and Structures Research Laboratory, M.I.T., Dec. 1968.
6. London, R.J., Watts, G.A., and Sissingh, G. J., “Experimental Hingeless Rotor Characteristics at Low Advance Ratio with Thrust,” NASA CR-114684, Dec. 1973.
7. Sissingh, G.J. and Donham, R.E., “Hingeless Rotor Theory and Experiment on Vibration Reduction by Periodic Variation of Conventional Controls,” presented at the AHS/NASA-Ames Specialists’ Meeting on Rotorcraft Dynamics, Feb. 1974.
8. McHugh, F.J. and Shaw, J. Jr., “Benefits of Higher-Harmonic Blade Pitch: Vibration Reduction, Blade-Load Reduction and Performance Improvement,” presented at the American Helicopter Society Mideast Region Symposium on Rotor Technology, Aug. 197
9. McHugh, F.J. and Shaw, J. Jr., “Helicopter Vibration Reduction with Higher-Harmonic Blade Pitch,” presented at the Third European Rotorcraft and Powered-Lift Aircraft Forum, Aix-en-Provence, France, Sept. 1977.
10. Hammond, C.E., “Helicopter Vibration Reduction Via Higher Harmonic Control,” Structures Laboratory, U.S. Army Research and Technology Laboratories, Proceedings of the Rotorcraft Vibration Workshop, NASA Ames Research Center, Feb. 1978.
11. Wood, E.R., Powers, R.W., and Hammond, C.E., “On Methods for Application of Harmonic Control,” presented at the Fourth European Rotorcraft and Powered-Lift Aircraft Forum, Stresa, Italy, Sept. 1978.
12. Powers, R.W., “Application of Higher Harmonic Blade Feathering for Helicopter Vibration Reduction,” submitted to the Western Region of the AHS in competition for the Robert L. Lichten Award, 1979.
13. McLarty, T.T., “Rotorcraft Flight Simulation with Coupled Rotor Aeroelastic Stability Analysis,” USAAMRDL TR 76-41A, May 1977.
14. Sadler, S.G., “Documentation of Myklestad Analysis (DNAM06),” Bell Helicopter Textron Rept. No. 299099-608, Oct. 1979.
15. Sadler, S.G., “Development and Application of a Method for Predicting Rotor Free Wake Positions and Resulting Rotor Blade Air Loads, Vol. I—Model and Results,” NASA CR-1911, Dec. 1971.