Wind-tunnel testing of rotor with individually controlled trailing-edge flaps for vibration reduction

Journal of Aircraft

Volumn 45, Issue 3, 2008, Pages 868-879

  Roget, Beatrice ^a,c   Chopra, Inderjit ^b,c  

^a NATIONAL INSTITUTE OF AEROSPACE   (United States)

^b UNIVERSITY OF MARYLAND   (United States)

^c AIAA ^*

Author keywords

[No Author keywords available]

Indexed keywords

RELIGIOUS BUILDINGS;

ACTIVE TRAILING EDGE FLAP; CLOSED LOOP TEST; CLOSED-LOOP CONTROL; CONTROL METHODS; SIMULTANEOUS REDUCTION; TRAILING EDGE FLAPS; VIBRATION REDUCTIONS; WIND-TUNNEL TESTING;

WIND TUNNELS;

EID: 46449109080     PISSN: 00218669     EISSN: 15333868     Source Type: Journal    
DOI: 10.2514/1.28455     Document Type: Article

References (27)

1. Friedmann, P. P., and Millott, T. A., "Vibration Reduction in Rotorcraft Using Active Control: A Comparison of Various Approaches," Journal of Guidance, Control, and Dynamics, Vol. 18, No. 4, July-Aug. 1995, pp. 664-673.
2. Nguyen, K., and Chopra, I., "Application of Higher Harmonic Control to Rotors Operating at High Speed and Thrust," Journal of the American Helicopter Society, Vol. 35, No. 3, 1990, pp. 78-89.
3. Hammond, C. E., "Wind Tunnel Results Showing Rotor Vibratory Loads Reduction Using Higher Harmonic Blade Pitch," Journal of the American Helicopter Society, Vol. 28, No. 1, Jan. 1983, pp. 10-15.
4. Shaw, J., Albion, N., Hanker, E. J., and Teal, R. S., "Higher Harmonic Control: Wind Tunnel Demonstration of Fully Effective Vibratory Hub Forces Suppression," Journal of the American Helicopter Society, Vol. 34, No. 1, Jan. 1989, pp. 14-25.
5. Nguyen, K., Betzina, M., and Kitaplioglu, C., "Full-Scale Demonstration of Higher Harmonic Control for Noise and Vibration Reduction on the XV-15 Rotor," Journal of the American Helicopter Society, Vol. 46, No. 3, July 2001, pp. 182-191.
6. Wood, E. R., Powere, R. W., Cline, C. H., and Hammond, C. E., "On Developing and Flight Testing a Higher Harmonic Control System," Journal of the American Helicopter Society, Vol. 30, No. 1, Jan. 1985, pp. 3-20.
7. Ham, N. D., "Helicopter Individual Blade Control and its Applications," American Helicopter Society 39th Annual Forum, American Helicopter Society International, Alexandria, VA, May 1983, pp. 613-623.
8. Guinn, K. F., "Individual Blade Control Independent of a Swashplate," Journal of the American Helicopter Society, Vol. 27, No. 3, July 1982, pp. 25-31.
9. Richter, P., and Blaas, A., "Full Scale Wind Tunnel Investigation of an Individual Blade Control System for the BO-105 Hingeless Rotor," 19th European Rotorcraft Forum, American Helicopter Society International, Alexandria, VA, Sept. 1993, pp. G5.1-G5.12.
10. Jacklin, S. A., Nguyen, K., Blaas, A., and Richter, P., "Full-Scale Wind Tunnel Test of a Helicopter Individual Blade Control System," American Helicopter Society 50th Annual Forum, American Helicopter Society International, Alexandria, VA, May 1994, pp. 579-596.
11. Chopra, I., "Status of Application of Smart Structures Technology to Rotorcraft Systems," Journal of the American Helicopter Society, Vol. 45, No. 4, Oct. 2000, pp. 228-252.
12. Straub, F. K., "A Feasibility Study of Using Smart Materials for Rotor Control," Smart Materials and Structures, Vol. 5, No. 1, Feb. 1996, pp. 1-10.
13. Prechtl, E. F., and Hall, R. S., "Design of a High Efficiency, Large Stroke, Electromechanical Actuator," Smart Materials and Structures, Vol. 8, No. 1, Feb. 1999, pp. 13-30. doi:10.1088/0964-1726/8/1/ 002
14. Millott, T. A., and Friedmann, P. P., "Vibration Reduction in Helicopter Rotors Using an Active Control Surface Located on the Blade," 33rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, AIAA, New York, 13-15 April 1992, p. 1975.
15. Milgram, J., and Chopra, I., "Parametric Design Study for Actively Controlled Trailing Edge Flaps," Journal of the American Helicopter Society, Vol. 43, No. 2, 1998, pp. 110-115.
16. Koratkar, N. A., and Chopra, I., "Wind Tunnel Testing of a Smart Rotor Model with Trailing-Edge Flaps," Journal of the American Helicopter Society, Vol. 47, No. 4, 2002, pp. 263-272.
17. Spencer, M. G., Sanner, R. M., and Chopra, I., "Adaptive Neurocontrol of Simulated Rotor Vibrations Using Trailing Edge Flaps," Journal of Intelligent Material Systems and Structures, Vol. 10, No. 11, 1999, pp. 855-871. doi:10.1106/RX0W-UJ7M-QEL9-E58P
18. Spencer, M. G., Sanner, R. M., and Chopra, I., "Closed-Loop Neurocontroller Tests on Piezoactuated Smart Rotor Blades in Hover," AIAA Journal, Vol. 40, No. 8, 2002, pp. 1596-1602.
19. Spencer, M. G., Sanner, R. M., and Chopra, I., "Adaptive Neurocontroller for Vibration Suppression and Shape Control of a Flexible Beam," Journal of Intelligent Material Systems and Structures, Vol. 9, No. 3, 1998, pp. 160-170.
20. Roget, B., and Chopra, I., "Individual Blade Control Methodology for a Rotor with Dissimilar Blades," Journal of the American Helicopter Society, Vol. 48, No. 3, July 2003, pp. 176-185.
21. Roget, B., and Chopra, I., "Closed Loop Testing of a Rotor with Individually Controlled Trailing-Edge Flaps for Vibration Reduction," American Helicopter Society 61st Annual Forum, American Helicopter Society International, Alexandria, VA, June 2005.
22. Gelb, A., Kasper, J. F., Nash, R. A., Price, C. F., and Sutherland, A. A., Applied Optimal Estimation, MIT Press, Cambridge, MA, 1974, p. 110.
23. Fletcher, R., and Powell, M. J. D.,"A Rapidly Convergent Descent Method for Minimization," Computer Journal, Vol. 6, No. 2, July 1963, pp. 163-168.
24. Goldfarb, D., "A Family of Variable Metric Updates Derived by Variational Means," Mathematics of Computing, Vol. 24, No. 109, Jan. 1970, pp. 23-26.
25. Koratkar, N., "Smart Helicopter Rotor with Piezoelectric Bender Actuated Trailing-Edge Flaps," Ph.D. Thesis, Aerospace Department, University of Maryland, College Park, MD, 2000.
26. Roget, B., and Chopra, I., "Wind Tunnel Testing of an Individual Blade Controller for a Dissimilar Rotor," American Helicopter Society 60th Annual Forum, American Helicopter Society International, Alexandria, VA, June 2004.
27. Yeo, H., and Chopra, I.,"Coupled Rotor/Fuselage Vibration Analysis Using Detailed 3-D Airframe Models," Mathematical and Computer Modelling, Vol. 33, Nos. 10-11, 2001, pp. 1035-1054. doi:10.1016/S0895- 7177(00)00299-5