Preliminary Flight Evaluation of an Engine Performance Optimization Algorithm
Lambert, H.H. and Gilyard, G.B. and Chisholm, J.D. and Kerr, L.J. (1991) Preliminary Flight Evaluation of an Engine Performance Optimization Algorithm. Technical Report NASA TM-4328, Research Engineering, NASA Dryden Flight Research Center.
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Abstract
The initial flight test evaluation phase of the performance seeking control (PSC) algorithm has been completed for one engine, subsonic, part power, and military power operation on an F-15 aircraft, using a PW 1128 engine. The algorithm is designed to optimize the quasi-steady-state performance of an engine for three primary modes of operation: the minimum fuel, the minimum fan turbine inlet temperature (FTIT), and the maximum thrust modes. The minimum fuel mode is designed to minimize thrust-specific fuel consumption during cruise conditions. The minimum FTIT mode is designed to extend the turbine life by decreasing the FTIT during cruise and accelerating flight conditions. The maximum thrust mode is designed to maximize net propulsive force at military power. Decreases in thrust-specific fuel consumption of approximately 1 percent have been measured in the minimum fuel mode; integrated over the life of the aircraft and fleet size, these fuel savings are significant. Decreases of up to approximately 100 ºR in FTIT were measured in the minimum FTIT mode. Temperature reductions of this magnitude are significant and would more than double engine life if FTIT were the only factor. Thrust increases of up to approximately 12 percent were measured in the maximum thrust mode. The system dynamics of the closed-loop algorithm operation appear good. The preliminary flight phase has provided a general validation of the PSC technology which can provide significant benefits to the next generation of fighter and transport aircraft.
| EPrint Type: | NASA Technical Memorandum |
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| Keywords: | Algorithms, Engine control, Estimation, F-15 aircraft, F-100 engine, Flight tests, Fuel consumption, HIDEC, Inlet temperature, Integrated control, Kalman filters, Optimal control, Optimization, Performance seeking control, Propulsion system performance, turbofan engines, Thrust control |
| Subjects: | (01 - 09) Aeronautics: (07) Aircraft Propulsion And Power Aircraft/Project: F-15 |
| ID Code: | 330 |
| Deposited On: | 01 September 2004 |
| Additional Information: | 19 pages. Presented at the AIAA/ASME/SAE/ASEE 27th Joint Propulsion Conference, Sacramento, CA, June 24–26, 1991. H.H. Lambert and G.B. Gilyard, NASA Dryden Flight Research Facility; J.D. Chisholm, McDonnell Douglas Corporation, St. Louis, MO; L.J. Kerr, Pratt & Whitney, West Palm Beach, FL. |
