Vertical Navigation Control Laws and Logic for the Next Generation Air Transportation System (9781794183674)

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A vertical navigation (VNAV) outer-loop control system was developed to capture and track the vertical path segments of energy-efficient trajectories that are being developed for high-density operations in the evolving Next Generation Air Transportation System (NextGen). The VNAV control system has a speed-on-elevator control mode to pitch the aircraft for tracking a calibrated airspeed (CAS) or Mach number profile and a path control mode for tracking the VNAV altitude profile. Mode control logic was developed for engagement of either the speed or path control modes. The control system will level the aircraft to prevent it from flying through a constraint altitude. A stability analysis was performed that showed that the gain and phase margins of the VNAV control system significantly exceeded the design gain and phase margins. The system performance was assessed using a six-deg-of-freedom non-linear transport aircraft simulation and the performance is illustrated with time-history plots of recorded simulation data. Hueschen, Richard M. and Khong, Thuan H. Langley Research Center NASA/TM-2013-218138, L-20313, NF1676L-17163


Product details

  • Paperback | 114 pages
  • 216 x 280 x 6mm | 281g
  • English
  • 1794183671
  • 9781794183674


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