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dc.contributor.advisorCollins, Daniel J.
dc.contributor.authorDougherty, Barry Lawrence
dc.dateSeptember 1981
dc.date.accessioned2012-11-20T00:16:19Z
dc.date.available2012-11-20T00:16:19Z
dc.date.issued1981-09
dc.identifier.urihttp://hdl.handle.net/10945/20508
dc.descriptionApproved for public release; distribution is unlimiteden_US
dc.description.abstractIn modern turbofan engines, variable geometry has been incorporated to improve some off-design performance. Most control designs ignore this variable geometry and use fuel metering as the primary control input. This thesis investigates the use of variable geometry to control the engine and, thereby, reduce fuel consumption due to transients. Additionally, steady-state trim conditions are altered to reduce the static fuel consumption. The non-linear transient simulation program is used to analyze the steady-state operating condition and develop small perturbation control limitations. Linear models, both large and reduced order, are used in analyzing the effect of controllers on system response. A computer program was generated to reduce a large order linear model to a usable size for control system development, This analysis shows the reduced-order regime dependent controllers to be viable and to favorably enhance the quest for reducing specific fuel consumption in existing engines.en_US
dc.description.urihttp://archive.org/details/effectonfueleffi00doug
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.subject.lcshAeronauticsen_US
dc.titleEffect on fuel efficiency of parameter variations in the cost function for multivariable control of a turbofan engineen_US
dc.typeThesisen_US
dc.contributor.secondreaderLayton, Donald M.
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentDepartment of Aeronautics
dc.subject.authorMultivariable controlen_US
dc.subject.authorF100 turbofan engineen_US
dc.subject.authorJet engine controlen_US
dc.subject.authorJet engine fuel efficiencyen_US
dc.description.serviceLieutenant, United States Navyen_US
etd.thesisdegree.nameM.S. in Aeronautical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineAeronautical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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