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http://dx.doi.org/10.5139/JKSAS.2020.48.3.217

Analytical Investigation of the Influence of Rotor Flap Dynamics on Helicopter Flight Control System Feedback Gain Limit  

Yang, Chang Deok (Dept. of Avionics, Korea Aerospace Industries, LTD)
Lee, Seung Deok (Dept. of Avionics, Korea Aerospace Industries, LTD)
Jung, Dong Woo (Dept. of Avionics, Korea Aerospace Industries, LTD)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.48, no.3, 2020 , pp. 217-224 More about this Journal
Abstract
The use of a high gain flight control system to achieve high bandwidth performance increase the instability of a helicopter. To investigate these phenomena numerically, high fidelity EC155B1 helicopter model and simplified flight control system that include actuator, digital processor and noise rejection filter was developed. A study conducts an analytical investigation of roll axis stability of the helicopter model as feedback gain increases. And this study analyzes roll-rate and roll-attitude feedback gains limited by rotor flap mode. The results indicate that the phase delays caused by the filter can severely limit the usable values of the roll-rate and roll-attitude feedback gains.
Keywords
Helcopter Flap Mode; Feedback Gain; Helicopter Stability;
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Times Cited By KSCI : 2  (Citation Analysis)
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1 McKillip, R., and Keller, J., "A Networked Simulation Environment for Dynamic Interface Flight Control Design and Evaluation," Proceedings of the AHS International 66th Annual Forum, No. 2, American Helicopter Soc., Alexandria, VA, May 2010, pp. 1801-1813.
2 Chen, R. T. N., and Hindson, W. S., "Influence of High-Order Dynamics on Helicopter Flight-Control System Bandwidth," Journal of Guidance, Control, and Dynamics, Vol. 9, No. 2, 1986, pp. 190-197.   DOI
3 Ji, H., Chen, R., and Li, P., "Rotor State Feedback Control to Alleviate Pilot Workload for Helicopter Shipboard Operations," Journal of Guidance, Control, and Dynamics, Vol. 40, No. 12, 2017, pp. 3088-3099.   DOI
4 Deftler, M. A., "UH-60A Helicopter Stability Augmentation Study," 14th European Rotorcraft Forum, Milano, Italy, Sep. 1988.
5 Padfield, G. D., Helicopter Flight Dynamics, 2nd edition, Blackwell, Oxford, England, U.K., 2017, pp. 299-306.
6 Anonymous, "FLIGHTLAB Theory Manual - Volumn One," Advanced Rotorcraft Technology, Inc., June 2006.
7 Yang, C. D., "Design of Handling Quality Assessment Environment Based on FLIGHTLAB Model Using Legacy Simulator," Journal of The Korean Society for Aeronautical and Space Sciences, Vol. 44, No. 6, 2016, pp. 530-536.   DOI
8 Peters, D. A., and He, C. J., "Finite State Induced Flow Models Part II: Three-Dimensional Rotor Disk," JOURNAL OF AIRCRAFT, Vol. 32, No. 2, March-April, 1995.
9 Yang, C. D., and Jung, D., W., "A Study on the Influence of Helicopter Main Rotor Inflow Model upon Launched Rocket Trajectory and Safe Launch Envelope," Journal of Aerospace System Engineering, Vol. 13, No. 3, 2019. pp. 70-77.   DOI
10 Vuillet, A., and d'Ambra, F., "The Fenestron a shrouded tail rotor concept for helicopters," 12th European Rotorcraft Forum, 1986
11 Leishman, J. G., Principles of Helicopter Aerodynamics, 1st edition. Cambridge, Cambridge University Press, 2002, pp. 229-231.
12 Anonymous, "FAA Advisory Circular AC120- 63, Helicopter Simulator Qualification," Federal Aviation Authority, November 1994.
13 Chen, R. T. N., and Hindson, W. S., "Analytical and Flight Investigation of the Influence of Rotor and Other High-Order Dynamics on Helicopter Flight-Control System Bandwidth," NASA TM 86696, 1985.