Helicopter vibration reduction using discrete controllable-stiffness devices at the rotor hub

19th AIAA Applied Aerodynamics Conference

Volumn , Issue , 2001, Pages

  Gandhi, Farhan ^a   Anusonti Inthra, Phuriwat ^a  

^a The Pennsylvania State University   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

AERODYNAMICS; HELICOPTER ROTORS; LOADS (FORCES); TORSIONAL STRESS;

CONTROLLABLE STIFFNESS; DISCRETE DEVICES; DISCRETE VARIABLES; HELICOPTER VIBRATION; ROTOR HELICOPTERS; STIFFNESS VARIATIONS; TORSION STIFFNESS; VARIABLE STIFFNESS SPRING;

STIFFNESS;

EID: 85067322124     PISSN: None     EISSN: None     Source Type: Conference Proceeding    
DOI: 10.2514/6.2001-1438     Document Type: Conference Paper

References (24)

1. Reichert, G., Helicopter Vibration Control-Survey, Vertica, Vol. 5, No. 1, 1981, pp. 1-20.
2. Lowey, R. G., Helicopter Vibrations: A Technological Perspective, Journal of the American Helicopter Society, Vol. 29, No. 4, Oct. 1984, pp. 4-30.
3. Nguyen, K., Higher Harmonic Control Analysis for Vibration Reduction of Helicopter Rotor Systems, Ph.D. Thesis, University of Maryland, 1989.
4. Milgram, J. H. 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.
5. st Annual Forum, May 1995, pp. 393-402.
6. th European Rotorcraft Forum, Amsterdam, Netherlands, September 1989, pp. 51.1-51.18.
7. Ganguli, R. and Chopra, I., Aeroelastic optimization of an Advanced Geometry Helicopter Rotor, Journal of the American Helicopter Society, Vol. 41, No. 1, January 1996, pp. 18-28.
8. Chen, P. and Chopra, I., Induced Strain Actuation of Composite beams and Rotor Blades with Embedded Piezoceramic elements, Proceedings of the SPIE on Smart Structures and Materials, 1994.
9. Jacklin, S. A., Blaas, A., Teves, D., and Kube, R., Reduction of Helicopter BVI Noise, Vibration and Power Consumption through Individual Blade Control, Proc. of the American Helicopter Society 51st Annual Forum, May 1995, pp. 662-680.
10. Shaw, J. et. al, Higher Harmonic Control: Wind Tunnel Demonstration of Fully Effective Vibratory Hub Force Suppression, Journal of the American Helicopter Society, Vol. 34, No. 1, January 1989.
11. Anusonti-Inthra, P., and Gandhi, F., Helicopter Vibration Reduction through Cyclic Variations in Rotor Blade Root Stiffness, Proceedings of the American Helicopter Society 55th Annual Forum, Montreal, Canada, May 1999.
12. Yang, J. N., Wu, J. C., and Li, Z., Control of Seismic-excited Buildings using Active Variable Stiffness Systems, Engineering Structures, Vol. 19, No. 9, 1996, p. 589-596.
13. Patten, W. N., Mo, C., Kuehn, J., and Lee, J., A Primer on Design of Semiactive Vibration Absorbers (SAVA), Journal of Engineering Mechanics, Vol. 124, No. 1, January 1998, pp. 61-68.
14. Sadek, F. and Mohraz, B., Semiactive Control Algorithms for Structures with Variable Dampers, Journal of Engineering Mechanics, Vol. 124, No. 9, September 1998, pp. 981-990.
15. Gavin, H. P. and Doke, N. S., Resonance Suppression through Variable Stiffness and Damping Mechanisms, Proceedings of the SPIE Smart Structures Conference, SPIE Vol. 3671, March 1999, pp 43-53.
16. Krasnicki, E. J., Comparison of Analytical and Experimental Results for a Semi-Active Vibration Isolator, The Shock and Vibration Bulletin, The Shock and Vibration Information Center, Naval Research Laboratory, Vol. 50. 1980.
17. Krasnicki, E. J., The Experimental Performance of an Off-Road Vehicle Utilizing a Semi-Active Suspension, The Shock and Vibration Bulletin, The Shock and Vibration Information Center, Naval Research Laboratory, 1984.
18. Hrovat, D., Margolis, D. L., and Hubbard, M., An Approach Toward the Optimal Semi-Active Suspension, Journal of Dynamic Systems, Measurement and Control, Vol. 110, September 1988, pp. 288-296.
19. Karnopp, D., Design Principles for Vibration Control Using Semi-Active Dampers, Journal of Dynamic Systems, Measurement and Control, Vol. 112, September 1990, pp. 448-455.
20. Symans, M. D. and Constantinou, M. C., Semiactive Control Systems for Seismic Protection of Structures: A State-of-the-art review, Engineering Structures, Vol. 21, 1999, pp. 469-487.
21. Marathe, S., Gandhi, F., and Wang, K. W., Helicopter Blade Response and Aeromechanical Stability with a Magnetorheological Fluid Based Lag Damper, Journal of Intelligent Material Systems and Structures, Vol. 9, No. 4, April 1998, pp. 272-282.
22. Kamath, G. M., Wereley, N. M., and Jolly, M. R., Characterization of Magnetorheological Helicopter Lag Dampers, Journal of the American Helicopter Society, Vol. 44, No. 3, July 1999, pp. 234-248.
23. Bir, G., Chopra, I., et al, University of Maryland Advanced Rotorcraft Code (UMARC) Theory Manual, UM-AERO Report 92-02, Aug. 1992.
24. Johnson, W., Self-tuning regulators for multicyclic control of helicopter vibration, NASA Technical Paper 1996, March 1982.