Pitch drop-back

From Wikipedia, the free encyclopedia
Jump to: navigation, search

Pitch drop-back is the phenomena by which an aircraft which is perturbed in flight path angle from its trim position by a step input exhibits an output which is indicative of a second order system.[1]

A pilot who actuates an elevator input may find that the aircraft then "droops" or "drops back" to a position further toward the start position. The phenomenon is particularly marked in tilt-rotor aircraft.[2] Pitch drop-back may be controlled using a Stability Augmentation System or Stability Control and Augmentation System.[3]

References[edit]

  1. ^ "Longitudinal stability and control of large tilt-rotor aircraft". IFAC-PapersOnLine. 2008-10-17. Retrieved 2010-10-05. 
  2. ^ Mark Voskuijl, Daniel J. Walker. "Active Control of Flight Path and Critical Loads in Tilt-Rotor Aircraft" (PDF). Engineering Department: University of Liverpool. Retrieved 5 October 2010. 
  3. ^ "Measuring Simulation Fidelity through an Adaptive Pilot Model" (PDF). Retrieved 2010-10-05.