Advances In Flight Flutter Testing Techniques

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Advances In Flight Flutter Testing Techniques

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Author : Asim Abbasi
language : en
Publisher: LAP Lambert Academic Publishing
Release Date : 2011-04

Advances In Flight Flutter Testing Techniques written by Asim Abbasi and has been published by LAP Lambert Academic Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-04 with categories.

Flight flutter testing is mandatory for aircraft certification; however it is a risky, lengthy and costly process with ever-growing demand for shorter and cheaper as well as online testing tools. This research has dealt with two key issues and the methods developed have been validated on simulated aeroelastic data sets. Firstly, the flutter boundaries are evaluated using statistical confidence criteria based on Least Squares statistics and eigenvalue perturbation theory rooting from noise statistics in the response data from a single flight test outdoing the need for Monte Carlo simulations or repeated tests. The approach is employed on three different flutter prediction tools: Damping Extrapolation method, Flutter Margin method and Envelope Function method. Results from the first two methods showed widening of the confidence bounds with increasing noise whilst the third method remained robust to it. The other research problem involves the development of an online flutter prediction tool using the Envelope Function method. The original approach is extended by making direct use of the chirp response to predict the flutter speed and is applicable to both offline and online versions.

Advances In Flight Flutter Testing Techniques

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Author : Asim Ali Abbasi
language : en
Publisher:
Release Date : 2009

Advances In Flight Flutter Testing Techniques written by Asim Ali Abbasi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

Flight Flutter Testing Advanced Methodologies

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Author : Matthew Jonathan Desforges
language : en
Publisher:
Release Date : 1995

Flight Flutter Testing Advanced Methodologies written by Matthew Jonathan Desforges and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.

Overview Of Recent Flight Flutter Testing Research At Nasa Dryden

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Author : Martin J. Brenner
language : en
Publisher:
Release Date : 1997

Overview Of Recent Flight Flutter Testing Research At Nasa Dryden written by Martin J. Brenner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Aeroelasticity categories.

A Review Of Recent Developments In Flight Test Techniques At The Ames Research Center Dryden Flight Research Facility

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Author :
language : en
Publisher:
Release Date : 1984

A Review Of Recent Developments In Flight Test Techniques At The Ames Research Center Dryden Flight Research Facility written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.

A Historical Overview Of Flight Flutter Testing

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Author : Michael W. Kehoe
language : en
Publisher:
Release Date : 1995

A Historical Overview Of Flight Flutter Testing written by Michael W. Kehoe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Flutter (Aerodynamics) categories.

Flutter Testing Techniques

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Author :
language : en
Publisher:
Release Date : 1976

Flutter Testing Techniques written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Aerodynamic measurements categories.

Flight Flutter Testing Methods And Techniques

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Author : Gaerard Piazzoli
language : en
Publisher:
Release Date : 1974

Flight Flutter Testing Methods And Techniques written by Gaerard Piazzoli and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with categories.

Proceedings Of The 1958 Flight Flutter Testing Symposium

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Author :
language : en
Publisher:
Release Date : 1975

Proceedings Of The 1958 Flight Flutter Testing Symposium written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Airplanes categories.

Application Of Advanced Parameter Identification Methods For Flight Flutter Data Analysis With Comparisons To Current Techniques

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Author : H. J. Perangelo
language : en
Publisher:
Release Date : 1984

Application Of Advanced Parameter Identification Methods For Flight Flutter Data Analysis With Comparisons To Current Techniques written by H. J. Perangelo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.

Grumman has been pursuing the implementation and evaluation of advanced parameter identification software for use in flutter test data processing operations as its Automated Telemetry Station. They have been motivated by aircraft design tending toward thin, lightweight aircraft structures, which make it difficult to use authoritative shaker systems, and the continuing development of high-sped digital computer technology. This development activity is aimed at establishing an on-line processing capability, in the 1985 time frame, that will initially use the maximum likelihood parameter identification algorithm in conjunction with a detailed physical aeroelastic aircraft model to perform optimal flutter test data analysis. Extended Kalman filtering is being considered for eventual use as a second advanced parameter identification method. A mathematical description of the advanced parameter identification approach and Grumman's current least-squares flutter analysis procedures are presented. A comparison between this current analysis capability and prototype code for the maximum likelihood parameter identification algorithm on response data excited randomly (via atmospheric turbulence) and by swept frequency shaker inputs indicates a significant improvement in analysis results with the advanced method.