Gust alleviation using direct turbulence measurementsThe research reported upon in this paper describes an effective method of gust alleviation using direct measurements of atmospheric turbulence to drive the aircraft control surfaces in a way that attempts to directly counter or cancel those forces and moments produced on the aircraft by gusts. The method yields a feedforward or open loop control law, simple to mechanize and relatively insensitive to changes in flight condition. When applied directly, the resulting control law effectively gust-alleviates in the low frequency phugoid and short period range but has a tendency to amplify structural mode vehicle motions due to the phase lag of the actuators. A method of design based upon the use of a diagonal or Jordan form of the equations of motion enables the designer to avoid this problem of structural mode excitation.
Document ID
19790061326
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Rynaski, E. G. (Calspan Advanced Technology Center Buffalo, NY, United States)
Andrisani, D., II (Calspan Advanced Technology Center Buffalo, NY, United States)
Eulrich, B. J. (Calspan Advanced Technology Center Buffalo, N.Y., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1979
Subject Category
Aircraft Stability And Control
Report/Patent Number
AIAA PAPER 79-1674
Meeting Information
Meeting: Atmospheric Flight Mechanics Conference for Future Space Systems