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Mach 10 Stage Separation Analysis for the X43-AThis paper describes the pre-flight stage separation analysis that was conducted in support of the final flight of the X-43A. In that flight, which occurred less than eight months after the successful Mach 7 flight, the X-43A Research Vehicle attained a peak speed of Mach 9.6. Details are provided on how the lessons learned from the Mach 7 flight affected separation modeling and how adjustments were made to account for the increased flight Mach number. Also, the procedure for defining the feedback loop closure and feed-forward parameters employed in the separation control logic are described, and their effect on separation performance is explained. In addition, the range and nominal values of these parameters, which were included in the Mission Data Load, are presented. Once updates were made, the nominal pre-flight trajectory and Monte Carlo statistical results were determined and stress tests were performed to ensure system robustness. During flight the vehicle performed within the uncertainty bounds predicted in the pre-flight analysis and ultimately set the world record for airbreathing powered flight.
Document ID
20080013578
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Tartabini, Paul V. (NASA Langley Research Center Hampton, VA, United States)
Bose, David M. (Analytical Mechanics Associates, Inc. Hampton, VA, United States)
Thornblom, Mark N. (Analytical Mechanics Associates, Inc. Hampton, VA, United States)
Lien, J. P. (Analytical Mechanics Associates, Inc. Hampton, VA, United States)
Martin, John G. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2007
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
AIAA 2006-1038
Meeting Information
Meeting: 44th AIAA Aerospace Sciences Meeting and Exhibit
Location: Reno, NV
Country: United States
Start Date: January 9, 2006
End Date: January 12, 2006
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 584772.07.01
Distribution Limits
Public
Copyright
Public Use Permitted.

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