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Development of a Flush Airdata Sensing System on a Sharp-Nosed Vehicle for Flight at Mach 3 to 8NASA Dryden Flight Research Center has developed a flush airdata sensing (FADS) system on a sharp-nosed, wedge-shaped vehicle. This paper details the design and calibration of a real-time angle-of-attack estimation scheme developed to meet the onboard airdata measurement requirements for a research vehicle equipped with a supersonic-combustion ramjet engine. The FADS system has been designed to perform in flights at speeds between Mach 3 and Mach 8 and at angles of attack between -6 deg. and 12 deg. The description of the FADS architecture includes port layout, pneumatic design, and hardware integration. Predictive models of static and dynamic performance are compared with wind-tunnel results across the Mach and angle-of-attack range. Results indicate that static angle-of-attack accuracy and pneumatic lag can be adequately characterized and incorporated into a real-time algorithm.
Document ID
20000041753
Acquisition Source
Armstrong Flight Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Davis, Mark C. (NASA Dryden Flight Research Center Edwards, CA United States)
Pahle, Joseph W. (NASA Dryden Flight Research Center Edwards, CA United States)
White, John Terry (NASA Dryden Flight Research Center Edwards, CA United States)
Marshall, Laurie A. (NASA Dryden Flight Research Center Edwards, CA United States)
Mashburn, Michael J. (Micro Craft, Inc. Tullahoma, TN United States)
Franks, Rick (Sverdrup Technology, Inc. Arnold AFS, TN United States)
Date Acquired
September 7, 2013
Publication Date
May 1, 2000
Subject Category
Avionics And Aircraft Instrumentation
Report/Patent Number
H-2396
NAS 1.15:209017
NASA/TM-2000-209017
AIAA Paper 2000-0504
Meeting Information
Meeting: 38th Aerospace Sciences Meeting and Exhibit
Location: Reno, NV
Country: United States
Start Date: January 10, 2000
End Date: January 13, 2000
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
PROJECT: RTOP 522-51-54
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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