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Advanced Control Considerations for Turbofan Engine DesignThis paper covers the application of a model-based engine control (MBEC) methodology featuring a self tuning on-board model for an aircraft turbofan engine simulation. The nonlinear engine model is capable of modeling realistic engine performance, allowing for a verification of the advanced control methodology over a wide range of operating points and life cycle conditions. The on-board model is a piece-wise linear model derived from the nonlinear engine model and updated using an optimal tuner Kalman Filter estimation routine, which enables the on-board model to self-tune to account for engine performance variations. MBEC is used here to show how advanced control architectures can improve efficiency during the design phase of a turbofan engine by reducing conservative operability margins. The operability margins that can be reduced, such as stall margin, can expand the engine design space and offer potential for efficiency improvements. Application of MBEC architecture to a nonlinear engine simulation is shown to reduce the thrust specific fuel consumption by approximately 1% over the baseline design, while maintaining safe operation of the engine across the flight envelope.
Document ID
Document Type
Conference Paper
Connolly, Joseph W.
(NASA Glenn Research Center Cleveland, OH United States)
Csank, Jeffrey T.
(NASA Glenn Research Center Cleveland, OH United States)
Chicatelli, Amy
(Vantage Partners, LLC Brook Park, OH, United States)
Date Acquired
January 31, 2017
Publication Date
July 25, 2016
Subject Category
Aircraft Propulsion And Power
Aircraft Design, Testing And Performance
Report/Patent Number
Meeting Information
Propulsion and Energy Forum(Salt Lake City, UT)
Funding Number(s)
WBS: WBS 109492.
Distribution Limits
Public Use Permitted.
jet propulsion
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