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Simulation Study of Impact of Aeroelastic Characteristics on Flying Qualities of a High Speed Civil TransportA piloted simulation study conducted in NASA Langley Visual Motion Simulator addressed the impact of dynamic aero- servoelastic effects on flying qualities of a High Speed Civil Transport. The intent was to determine effectiveness of measures to reduce the impact of aircraft flexibility on piloting tasks. Potential solutions examined were increasing frequency of elastic modes through structural stiffening, increasing damping of elastic modes through active control, elimination of control effector excitation of the lowest frequency elastic modes, and elimination of visual cues associated with elastic modes. Six test pilots evaluated and performed simulated maneuver tasks, encountering incidents wherein cockpit vibrations due to elastic modes fed back into the control stick through involuntary vibrations of the pilots upper body and arm. Structural stiffening and compensation of the visual display were of little benefit in alleviating this impact, while increased damping and elimination of control effector excitation of the elastic modes both offered great improvements when applied in sufficient degree.
Document ID
20020084988
Document Type
Technical Publication (TP)
Authors
Raney, David L. (NASA Langley Research Center Hampton, VA United States)
Jackson, E. Bruce (NASA Langley Research Center Hampton, VA United States)
Buttrill, Carey S. (NASA Langley Research Center Hampton, VA United States)
Date Acquired
September 7, 2013
Publication Date
October 1, 2002
Subject Category
Aircraft Stability and Control
Report/Patent Number
NASA/TP-2002-211943
L-18157
NAS 1.60:211943
Funding Number(s)
PROJECT: RTOP 537-08-23-21
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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