Sensitivity of rotor-fault-induced vibrations to operational and design parameters

Journal of the American Helicopter Society

Volumn 49, Issue 3, 2004, Pages 328-339

  Yang, Mao ^a   Chopra, Inderjit ^a   Haas, David J ^b  

^a UNIVERSITY OF MARYLAND   (United States)

^b NAVAL SURFACE WARFARE CENTER   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

AIRFRAMES; EQUATIONS OF MOTION; FAILURE ANALYSIS; FINITE ELEMENT METHOD; FLIGHT DYNAMICS; FUSELAGES; MATHEMATICAL MODELS; NATURAL FREQUENCIES; SENSITIVITY ANALYSIS; STIFFNESS MATRIX; TRANSFER FUNCTIONS; VIBRATIONS (MECHANICAL);

AIRFRAME VIBRATION; FLIGHT TEST; PITCH CONTROL; ROTOR SYSTEM FAULTS;

HELICOPTER ROTORS;

EID: 4344567313     PISSN: 00028711     EISSN: None     Source Type: Journal    
DOI: 10.4050/jahs.49.328     Document Type: Article

References (14)

1. Ganguli, R., Chopra, I., and Haas, D. J., "Formulation of a Helicopter Rotor-System Damage Detection Methodology," Journal of the American Helicopter Society, Vol. 41, (4), October 1996, pp. 302-312.
2. Ganguli, R., Chopra, I., and Haas, D. J., "Simulation of Helicopter Rotor-System Structural Damage, Blade Mistracking, Friction and Freeplay," Journal of Aircraft, Vol. 35, (4), July-August 1998, pp. 591-597.
3. Ganguli, R., Chopra, I., and Haas, D. J., "Helicopter Rotor System Fault Detection Using Physics-Based Model and Neural Networkins," AIAA Journal, Vol. 36, (6), June 1998, pp. 1078-1086.
4. Ganguli, R., Chopra, I., and Haas, D. J., "Simulation and Detection of Rotor-System Faults Using Neural Networks," Journal of the American Helicopter Society, Vol. 42, (2), April 1997, pp. 161-171.
5. Azzam, H., and Andrew, M. J., "The Use of Math-Dynamic Models to Aid the Development of Integrated Health and Usage Monitoring System," Journal of Aerospace Engineering, Part G, Vol. 206, 1992, pp. 71-96.
6. Hansford, R. E., and Vorwald, J., "Dynamics Workshop on Rotor Vibratory Loads Prediction," Journal of the American Helicopter Society, Vol 43, (1), January 1998, pp. 76-87.
7. Kvaternik, R. G., "The NASA/Industry Design Analysis Methods for Vibration (DAMVIBS) Program - A Government Overview," Proceedings of the 33rd AIAA Structures, Structural Dynamics and Materials Conference, Dallas, TX, April 1992, pp. 1103-1112.
8. Yeo, H., and Chopra, I., "Coupled Rotor/Fuselage Vibration Analysis Using Detailed 3-D Airframe Models," Mathematical and Computer Modeling, Vol. 33, (10-11), May-June 2001, pp. 1035-1054.
9. Paul, W. F., "Development and Evaluation of the Main Rotor Bifilar Absorber," Paper No. 354, American Helicopter Society 25th Annual Forum Proceedings, Washington, DC, May 1969.
10. Miao, W., and Mouzakis, T, "Nonlinear Dynamic Characteristics of the Rotor Bifilar Absorber," American Helicopter Society 37th Annual Forum Proceedings, May 1981, pp. 227-236.
11. Yang, M., Chopra, I., and Haas, D. J., "Rotor System Health Monitoring Using Coupled Rotor-Fuselage Vibration Analysis," American Helicopter Society 56th Annual Forum Proceedings, Virginia Beach, May 2000, pp. 610-622.
12. Yang, M., Chopra, I., and Haas, D. J., "Rotor-Fuselage Vibration Analysis for a Dissimilar Rotor with Single and Multiple Faults," American Helicopter Society 57th Annual Forum Proceedings, Washington, DC, May 2001, pp. 1810-1821.
13. Bir, G., Chopra, I., and Ganguli, R., et al., "University of Maryland Advanced Rotorcraft Code (UMARC) Theory Manual," UM-AERO Report 94-18, July 1994.
14. Bagai, A., and Leishman, J. G., "Rotor Free-Wake Modeling Using a Pseudo-Implicit Relaxation Algorithm," Journal of Aircraft, Vol. 32, (6), 1995, pp. 1276-1285.