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Subsonic flight test evaluation of a performance seeking control algorithm on an F-15 airplaneThe subsonic flight test evaluation phase of the NASA F-15 (powered by F 100 engines) performance seeking control program was completed for single-engine operation at part- and military-power settings. The subsonic performance seeking control algorithm optimizes the quasi-steady-state performance of the propulsion system for three modes of operation. The minimum fuel flow mode minimizes fuel consumption. The minimum thrust mode maximizes thrust at military power. Decreases in thrust-specific fuel consumption of 1 to 2 percent were measured in the minimum fuel flow mode; these fuel savings are significant, especially for supersonic cruise aircraft. Decreases of up to approximately 100 degree R in fan turbine inlet temperature were measured in the minimum temperature mode. Temperature reductions of this magnitude would more than double turbine life if inlet temperature was the only life factor. Measured thrust increases of up to approximately 15 percent in the maximum thrust mode cause substantial increases in aircraft acceleration. The system dynamics of the closed-loop algorithm operation were good. The subsonic flight phase has validated the performance seeking control technology, which can significantly benefit the next generation of fighter and transport aircraft.
Document ID
19920022031
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Gilyard, Glenn B. (NASA Hugh L. Dryden Flight Research Facility Edwards, CA, United States)
Orme, John S. (NASA Hugh L. Dryden Flight Research Facility Edwards, CA, United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1992
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
NAS 1.15:4400
H-1808
NASA-TM-4400
Meeting Information
Meeting: AIAA/SAE/ASME/ASEE Joint Propulsion Conference
Location: Nashville, TN
Country: United States
Start Date: July 6, 1992
End Date: July 8, 1992
Accession Number
92N31275
Funding Number(s)
PROJECT: RTOP 533-02-36
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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