Swashplateless helicopter rotor system with active trailing-edge flaps for primary and vibration controls

Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

Volumn 6, Issue , 2004, Pages 4661-4670

  Shen, Jinwei ^a   Yang, Mao ^a   Chopra, Inderjit ^a  

^a UNIVERSITY OF MARYLAND   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ACTUATORS; CONTROL SYSTEMS; FUNCTIONS; MACHINE DESIGN; MATHEMATICAL MODELS; VIBRATION CONTROL; VIBRATIONS (MECHANICAL);

ACTIVE TRAILING-EDGE FLAPS; AERODYNAMIC EQUILIBRIUM; ENERGY DENSITY; SWASHPLATELESS HELICOPTER ROTOR SYSTEMS;

HELICOPTER ROTORS;

EID: 16244399475     PISSN: 02734508     EISSN: None     Source Type: Conference Proceeding    
DOI: 10.2514/6.2004-1951     Document Type: Conference Paper

References (22)

1. Pescara, R., "Screw Propeller of Helicopter Flying Machines," U.S. Patent 1,449,129, March 1923.
2. Chopra, I., "Status of Application of Smart Structures Technology to Rotorcraft Systems," Journal of the American Helicopter Society, Vol. 45, No. 4, October 2000, pp. 228-252.
3. Barrett, R., Schliesman, M., and Frye, P., "Design, Development and Testing of a Mini Solid State Adaptive Rotorcraft," SPIE Symposium on Smart Structures and Materials, Conference on Smart Structures and Integrated Systems, San Diego, CA, March 1997, pp. 231-242.
4. Friedmann, P. and Millott, T., "Vibration Reduction in Rotorcraft Using Active Control: A Comparison of Various Approaches," Journal of Guidance, Control, and Dynamics, Vol. 18, No. 4, 1995, pp. 664.
5. Milgram, J., Chopra, I., and Straub, F., "Rotors with Trailing Edge Flaps: Analysis and Comparison with Experimental Data," Journal of the American Helicopter Society, Vol. 43, No. 4, October 1998, pp. 319-332.
6. Milgram, J. and Chopra, I., "A Parametric Design Study for Actively Controlled Trailing Edge Flaps," Journal of the American Helicopter Society, Vol. 43, No. 2, April 1998, pp. 110-119.
7. Myrtle, T. F. and Friedmann, P. P., "Vibration Reduction in Rotorcraft Using Actively Controlled Trailing Edge and Issue Related to Practical Implementation," AHS International 54th Annual Forum Proceedings, Washington, D.C., May 20-22 1998.
8. Straub, F. K. and Charles, B. D., "Aeroelastic Analysis of Rotors with Trailing Edge Flaps Using Comprehensive Codes," Journal of the American Helicopter Society, Vol. 46, No. 3, July 2001, pp. 192-199.
9. Kaman, C., "Aircraft of rotary wing type," U.S. Patent 2,455,866, December 1948.
10. Wei, F.-S. and Jones, R., "Correlation and Analysis for SH-2F 101 Rotor," Journal of Aircraft, Vol. 25, No. 7, July 1988, pp. 647-652.
11. Fulton, M. V. and Ormiston, R. A., "Hover Testing of a Small-Scale Rotor with On-Blade Elevons," Journal of the American Helicopter Society, Vol. 46, No. 2, April 2001, pp. 96-106.
12. Bernhard, A. and Chopra, I., "Trailing Edge Flap Activated by a Piezo-Induced Bending-Torsion Coupled Beam," Journal of the American Helicopter Society, Vol. 44, No. 1, January 1999, pp. 3-15.
13. Koratkar, N. A. and Chopra, I., "Wind Tunnel Testing of a Mach-Scaled Rotor Model with Trailing-Edge Flaps," Smart Materials and Structures Journal, Vol. 10, No. 1, February 2001, pp. 1-14.
14. Shen, J. and Chopra, I., "Actuation Requirements for a Swashplateless Helicopter Control System With Trailing-Edge Flaps," Proceeding of the 43rd AIAA/ASME/ASCE/AHS structures, structural dynamics, and materials conference and 10th AIAA/ASME/AHS adaptive structures conference, No. AIAA-2002-1444, Denver, Colorado, April 2002, p. 11.
15. Bir, G. and Chopra, I., "University of Maryland Advanced Rotor Code (UMARC) Theory Manual," Tech. Rep. UM-AERO 94-18, Center for Rotorcraft Education and Research, University of Maryland, College Park, July 1994.
16. Shen, J. and Chopra, I., "A Parametric Design Study for a Swashplateless Helicopter Rotor with Trailing-Edge Flaps," Journal of the American Helicopter Society, Vol. 49, No. 1, January 2004, pp. 43-53.
17. Shen, J., Chopra, I., and Johnson, W., "Performance of Swashplateless Ultralight Helicopter Rotor with Trailing-edge Flaps for Primary Flight Control," American Helicopter Society 59th Annual Forum Proceedings, Phoenix, AZ, May 6-8 2003, p. 11.
18. Datta, A. and Chopra, I., "Validation of Structural and Aerodynamic Modeling Using UH-60 Flight Test Data," American Helicopter Society 59th Annual Forum Proceedings, Phoenix, AZ, May 6-8 2003, p. 15.
19. Shen, J. and Chopra, I., "Ultralight Helicopter with Trailing-Edge Flap for Primary Control," Proceedings of American Helicopter Society International Meeting on Advanced Rotorcraft Technology and Life Saving Activities, Tochigi, Japan, November 2002, p. 10.
20. nd AIAA/ASME/ASCE/AHS/ASC structure, structural dynamics, and materials conference, AIAA-2001-1675, Seattle, WA, April, 16-19 2001, p. 11.
21. Theodorsen, T. and Garrick, I. E., "Nonstationary Flow about a Wing-Aileron-Tab Combination Including Aerodynamic Balance," Tech. Rep. No. 736, NACA, 1942.
22. Johnson, W., "Self-Tuning Regulators for Multicyclic Control of Helicopter Vibration," Tech. Rep. TP 1996, NASA, March 1982.