Buffet induced structural/flight-control system interaction of the X-29A aircraftHigh-alpha flight creates unique aerodynamic phenomena which increase the level of structural mode excitation; in conjunction with high-gain digital control systems, this structural response may result in an aeroservoelastic interaction. One such interaction has been observed during high-alpha flight testing of the X-29A. Data are presented which demonstrate the enhanced modal power in this aircraft's structural accelerometers, the feedback sensors, and the command signals as a function of alpha value. The structural interaction is traced from the aerodynamic buffet to the flight-control surfaces.
Document ID
19910047389
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Voracek, David F. (NASA Hugh L. Dryden Flight Research Facility Edwards, CA, United States)
Clarke, Robert (NASA Flight Research Center Edwards, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1991
Subject Category
Aircraft Stability And Control
Report/Patent Number
AIAA PAPER 91-1053
Meeting Information
Meeting: AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference