Estimation of Aircraft Nonlinear Unsteady Parameters From Wind Tunnel Data

Estimation of Aircraft Nonlinear Unsteady Parameters From Wind Tunnel Data PDF Author: Vladislav Klein
Publisher:
ISBN:
Category : Oscillations
Languages : en
Pages : 46

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Estimation of Aircraft Nonlinear Unsteady Parameters from Wind Tunnel Data

Estimation of Aircraft Nonlinear Unsteady Parameters from Wind Tunnel Data PDF Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722208226
Category :
Languages : en
Pages : 44

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Aerodynamic equations were formulated for an aircraft in one-degree-of-freedom large amplitude motion about each of its body axes. The model formulation based on indicial functions separated the resulting aerodynamic forces and moments into static terms, purely rotary terms and unsteady terms. Model identification from experimental data combined stepwise regression and maximum likelihood estimation in a two-stage optimization algorithm that can identify the unsteady term and rotary term if necessary. The identification scheme was applied to oscillatory data in two examples. The model identified from experimental data fit the data well, however, some parameters were estimated with limited accuracy. The resulting model was a good predictor for oscillatory and ramp input data. Klein, Vladislav and Murphy, Patrick C. Langley Research Center RTOP 522-33-11-05...

Modeling of longitudinal unsteady aerodynamics of a wingtail combination

Modeling of longitudinal unsteady aerodynamics of a wingtail combination PDF Author:
Publisher: DIANE Publishing
ISBN: 1428996788
Category :
Languages : en
Pages : 29

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Monthly Catalog of United States Government Publications

Monthly Catalog of United States Government Publications PDF Author:
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Category : Government publications
Languages : en
Pages : 1154

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Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports PDF Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 602

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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

NASA Langley Scientific and Technical Information Output: 1998

NASA Langley Scientific and Technical Information Output: 1998 PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 166

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U.S. Government Research Reports

U.S. Government Research Reports PDF Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 188

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AIAA Aerospace Sciences Meeting and Exhibit, 42nd

AIAA Aerospace Sciences Meeting and Exhibit, 42nd PDF Author:
Publisher:
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Category : Aeronautics
Languages : en
Pages : 590

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NASA Technical Note

NASA Technical Note PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 936

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Aeronautical Engineering PDF Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 538

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