Author: Asim Abbasi
Publisher: LAP Lambert Academic Publishing
ISBN: 9783844330786
Category :
Languages : en
Pages : 248
Book Description
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
Author: Asim Abbasi
Publisher: LAP Lambert Academic Publishing
ISBN: 9783844330786
Category :
Languages : en
Pages : 248
Book Description
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.
Publisher: LAP Lambert Academic Publishing
ISBN: 9783844330786
Category :
Languages : en
Pages : 248
Book Description
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.
Flutter Testing Techniques
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 532
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 532
Book Description
Flutter Testing Techniques
Author:
Publisher:
ISBN:
Category : Aerodynamic measurements
Languages : en
Pages : 534
Book Description
Publisher:
ISBN:
Category : Aerodynamic measurements
Languages : en
Pages : 534
Book Description
Advances in flight flutter testing techniques
Author: Asim Ali Abbasi
Publisher:
ISBN:
Category :
Languages : en
Pages : 261
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 261
Book Description
Investigation of Flight Flutter Testing Techniques
Author: Martin D. Schwartz
Publisher:
ISBN:
Category :
Languages : en
Pages : 506
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 506
Book Description
A Historical Overview of Flight Flutter Testing
Author: Michael W. Kehoe
Publisher:
ISBN:
Category : Flutter (Aerodynamics)
Languages : en
Pages : 24
Book Description
Publisher:
ISBN:
Category : Flutter (Aerodynamics)
Languages : en
Pages : 24
Book Description
Flight Flutter Testing Methods and Techniques
Author: Gaerard Piazzoli
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Several Techniques for Flight Flutter Testing
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 81
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 81
Book Description
Flutter Testing Techniques
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 512
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 512
Book Description
Several Techniques for Flight Flutter Testing
Author: North Atlantic Treaty Organization. Advisory Group for Aeronautical Research and Development
Publisher:
ISBN:
Category : Flutter (Aerodynamics)
Languages : en
Pages : 81
Book Description
Publisher:
ISBN:
Category : Flutter (Aerodynamics)
Languages : en
Pages : 81
Book Description