Skip to main content

Rotorcraft Precision Hover Control in Atmospheric Turbulence via Eigenstructure Assignment

Buy Article:

$35.00 + tax (Refund Policy)

The rotorcraft Aeronautical Design Standard (ADS-33E-PRF) specifies a frequency domain criterion to define handling qualities rating for pitch–roll angular rate cross-axis coupling in the "bandwidth" frequency range. The specification is derived based on flight tests in forward flight conditions. For rotorcraft operating near "hover," cross-axis coupling in the pitch–roll–yaw axes originates from both angular rate and low-frequency translational rate interaction. It is shown that this multiaxis cross-coupling including the entire rigid body mode spectrum is a dominant factor for handling qualities deterioration. Hover operations under turbulent atmospheric disturbances further degrade handling qualities, leading to aggravated pilot workload and cause safety of flight concerns. Control augmentation schemes, based on an eigenstructure assignment technique, are proposed to mitigate cross-axis rate coupling and improve disturbance rejection to enable precision "hover" control in turbulent atmospheric conditions.

Document Type: Research Article

Publication date: January 1, 2019

This article was made available online on December 20, 2018 as a Fast Track article with title: "Rotorcraft Precision Hover Control in Atmospheric Turbulence via Eigenstructure Assignment".

More about this publication?
  • The Journal of the AHS is the world's only scientific journal dedicated to vertical flight technology. It is a peer-reviewed technical journal published quarterly by The Vertical Flight Society and presents innovative papers covering the state-of-the-art in all disciplines of VTOL design, research and development. (Please note that VFS members receive significant discounts on articles and subscriptions.)

    Journal subscribers who are VFS members log in here if you are not already logged in.

    Authors can find submission guidelines and related information on the VFS website.

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content