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The High Stability Engine Control (HISTEC) Program: Flight Demonstration PhaseFuture aircraft turbine engines, both commercial and military, must be able to accommodate expected increased levels of steady-state and dynamic engine-face distortion. The current approach of incorporating sufficient design stall margin to tolerate these increased levels of distortion would significantly reduce performance. The objective of the High Stability Engine Control (HISTEC) program is to design, develop, and flight-demonstrate an advanced, integrated engine control system that uses measurement-based estimates of distortion to enhance engine stability. The resulting distortion tolerant control reduces the required design stall margin, with a corresponding increase in performance and decrease in fuel burn. The HISTEC concept has been developed and was successfully flight demonstrated on the F-15 ACTIVE aircraft during the summer of 1997. The flight demonstration was planned and carried out in two phases, the first to show distortion estimation, and the second to show distortion accommodation. Post-flight analysis shows that the HISTEC technologies are able to successfully estimate and accommodate distortion, transiently setting the stall margin requirement on-line and in real-time. This allows the design stall margin requirement to be reduced, which in turn can be traded for significantly increased performance and/or decreased weight. Flight demonstration of the HISTEC technologies has significantly reduced the risk of transitioning the technology to tactical and commercial engines.
Document ID
19980206364
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
DeLaat, John C.
(NASA Lewis Research Center Cleveland, OH United States)
Southwick, Robert D.
(Pratt and Whitney Aircraft West Palm Beach, FL United States)
Gallops, George W.
(Pratt and Whitney Aircraft West Palm Beach, FL United States)
Orme, John S.
(NASA Dryden Flight Research Center Edwards, CA United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1998
Publication Information
Publisher: American Inst. of Aeronautics and Astronautics
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
NASA/TM-1998-208482
E-11257
AIAA Paper 98-3756
NAS 1.15:208482
Meeting Information
Meeting: Joint Propulsion Conference
Location: Cleveland, OH
Country: United States
Start Date: July 12, 1998
End Date: July 15, 1998
Sponsors: American Society for Electrical Engineers, American Society of Mechanical Engineers, Society of Automotive Engineers, Inc., American Inst. of Aeronautics and Astronautics
Funding Number(s)
PROJECT: RTOP 523-53-13
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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