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      • Department of Mechanical Engineering
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      Piloted evaluation of a control allocation technique to recover from pilot-induced oscillations

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      Author
      Acosta, D. M.
      Yıldız, Yıldıray
      Craun, R. W.
      Beard, S. D.
      Leonard, M. W.
      Hardy, G. H.
      Weinstein, M.
      Date
      2015
      Source 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 Paper
      Item Usage Stats
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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.
      Keywords
      Actuators
      Aircraft
      Aircraft models
      Control surfaces
      Energy efficiency
      NASA
      Recovery
      Permalink
      http://hdl.handle.net/11693/28263
      Published Version (Please cite this version)
      https://doi.org/10.2514/1.C032576
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      • Department of Mechanical Engineering 273
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