Piloted evaluation of a control allocation technique to recover from pilot-induced oscillations
Author
Acosta, D. M.
Yıldız, Yıldıray
Craun, R. W.
Beard, S. D.
Leonard, M. W.
Hardy, G. H.
Weinstein, M.
Date
2015Source Title
Journal of Aircraft
Print ISSN
0021-8669
Publisher
American Institute of Aeronautics and Astronautics
Volume
52
Issue
1
Pages
130 - 140
Language
English
Type
Conference PaperItem Usage Stats
132
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192
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Abstract
This paper describes the maturation of a control allocation technique designed to assist pilots in recovery from pilot-induced oscillations. The control allocation technique to recover from pilot-induced oscillations is designed to enable next-generation high-efficiency aircraft designs. Energy-efficient next-generation aircraft require feedback control strategies that will enable lowering the actuator rate limit requirements for optimal airframe design. A common issue on aircraft with actuator rate limitations is they are susceptible to pilot-induced oscillations caused by the phase lag between the pilot inputs and control surface response. The control allocation technique to recover from pilot-induced oscillations uses real-time optimization for control allocation to eliminate phase lag in the system caused by control surface rate limiting. System impacts of the control allocator were assessed through a piloted simulation evaluation of a nonlinear aircraft model in the NASA Ames Research Center's Vertical Motion Simulator. Results indicate that the control allocation technique to recover from pilot-induced oscillations helps reduce oscillatory behavior introduced by control surface rate limiting, including the pilot-induced oscillation tendencies reported by pilots.