An indirect adaptive control algorithm has been developed to minimize fuel flow consumption for an integrated aircraft/engine system in both subsonic and supersonic cruise operation. The algorithm utilizes onboard models of the aircraft and engine, with tracking logic to identify and account for any differences between the engine model and the true engine cycle. A constrained numerical optimization technique is used with the onboard models to identify trim control sets that provide a fuel flow reduction. Revised trim solutions are transmitted to the plant as incremental changes to the scheduled control positions, with the aircraft and engine control systems responding to the adjustments through normal control operation. The adaptive control algorithm is modeled within a high fidelity, six-degree-of-freedom aircraft/engine simulation incorporating advanced fighter aircraft features. This paper presents study results showing both potential and actual performance benefits from the adaptive algorithm, as well as its sensitivity to off-nominal variations.
Performance seeking control for cruise optimization in fighter aircraft
Leistungsregelung fuer die Flugoptimierung eines Kampfflugzeuges
AIAA-Papers ; Jul ; 1-14
1987
14 Seiten, 9 Bilder, 7 Tabellen, 6 Quellen
Conference paper
English