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    기술보고서 게시판 내용
    타이틀 Peak Seeking Control for Reduced Fuel Consumption with Preliminary Flight Test Results
    저자 Brown, Nelson
    Keyword AIRCRAFT PERFORMANCE;; ALGORITHMS;; EFFECTORS;; F-18 AIRCRAFT;; FLIGHT CONDITIONS;; FLIGHT OPTIMIZATION;; FLIGHT TESTS;; FUEL CONSUMPTION;; FUEL FLOW;; ITERATION;; KALMAN FILTERS;; LEADING EDGE FLAPS;; NEWTON-RAPHSON METHOD;; REAL TIME OPERATION;; TRAILING EDGE FLAPS
    URL http://hdl.handle.net/2060/20130001596
    보고서번호 DFRC-E-DAA-TN6056
    발행년도 2012
    출처 NTRS (NASA Technical Report Server)
    ABSTRACT The Environmentally Responsible Aviation project seeks to accomplish the simultaneous reduction of fuel burn, noise, and emissions. A project at NASA Dryden Flight Research Center is contributing to ERAs goals by exploring the practical application of real-time trim configuration optimization for enhanced performance and reduced fuel consumption. This peak-seeking control approach is based on Newton-Raphson algorithm using a time-varying Kalman filter to estimate the gradient of the performance function. In real-time operation, deflection of symmetric ailerons, trailing-edge flaps, and leading-edge flaps of a modified F-18 are directly optimized, and the horizontal stabilators and angle of attack are indirectly optimized. Preliminary results from three research flights are presented herein. The optimization system found a trim configuration that required approximately 3.5% less fuel flow than the baseline trim at the given flight condition. The algorithm consistently rediscovered the solution from several initial conditions. These preliminary results show the algorithm has good performance and is expected to show similar results at other flight conditions and aircraft configurations.

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