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A Full-Envelope Air Data Calibration and Three-Dimensional Wind Estimation Method Using Global Output-Error Optimization and Flight-Test TechniquesA novel, efficient air data calibration method is proposed for aircraft with limited envelopes. This method uses output-error optimization on three-dimensional inertial velocities to estimate calibration and wind parameters. Calibration parameters are based on assumed calibration models for static pressure, angle of attack, and flank angle. Estimated wind parameters are the north, east, and down components. The only assumptions needed for this method are that the inertial velocities and Euler angles are accurate, the calibration models are correct, and that the steady-state component of wind is constant throughout the maneuver. A two-minute maneuver was designed to excite the aircraft over the range of air data calibration parameters and de-correlate the angle-of-attack bias from the vertical component of wind. Simulation of the X-48B (The Boeing Company, Chicago, Illinois) aircraft was used to validate the method, ultimately using data derived from wind-tunnel testing to simulate the un-calibrated air data measurements. Results from the simulation were accurate and robust to turbulence levels comparable to those observed in flight. Future experiments are planned to evaluate the proposed air data calibration in a flight environment.
Document ID
20120016235
Acquisition Source
Armstrong Flight Research Center
Document Type
Conference Paper
Authors
Taylor, Brian R. (NASA Dryden Flight Research Center Edwards, CA, United States)
Date Acquired
August 26, 2013
Publication Date
July 22, 2012
Subject Category
Aircraft Stability And Control
Report/Patent Number
DFRC-E-DAA-TN5340
Meeting Information
Meeting: Atmospheric Flight Mechanics
Location: Minneapolis, MN
Country: United States
Start Date: July 22, 2012
Sponsors: American Inst. of Aeronautics and Astronautics
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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