In-flight Modal Analysis - A Comparison between Sweep and Turbulence Excitation

Bart Peeters; Tim De Troyer; Patrick Guillaume; Herman Van Der Auweraer

In-flight Modal Analysis - A Comparison between Sweep and Turbulence Excitation

Bart Peeters
, Tim De Troyer
, Patrick Guillaume
, Herman Van Der Auweraer

Applied Mechanics

Research output: Chapter in Book/Report/Conference proceeding › Conference paper

21 Citations (Scopus)

Abstract

At the end of the development cycle, a new aircraft is certified by means of in-flight flutter tests. These
tests consist of flying the aircraft at different airspeeds and measuring the accelerations at a limited
number of locations on the aircraft structure. The scope is to open the flight domain by verifying that the
aircraft does not suffer from aero-elastic instabilities such as flutter.
In this paper, some modern frequency-domain modal parameter estimation methods are applied to in-flight
data of a large aircraft. Traditional sine sweep excitation was applied at the control surfaces. However,
during the test the aircraft passed through a turbulent zone. The sweep excitation was immediately
stopped, but the on-board data acquisition system continued to record the aircraft vibration response. After
quitting the turbulent zone, the sweep test was reinitiated. The present data thus allows for a comparison
between artificial and natural excitation. More specifically, aspects such as data pre-processing, easiness
of the parameter extraction process and the accuracy of the results are investigated.

Original language	English
Title of host publication	International Conference on Noise and Vibration Engineering ISMA 2006
Pages	1627-1642
Number of pages	16
Publication status	Published - 18 Sept 2006
Event	Finds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet - Stockholm, Sweden Duration: 21 Sept 2009 → 25 Sept 2009

Conference

Conference	Finds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet
Country/Territory	Sweden
City	Stockholm
Period	21/09/09 → 25/09/09

Keywords

Modal analysis
aerospace
flutter
vibration

Access to Document

http://www.isma-isaac.be/past/conf/isma2006/download/ISMA2006_abstract_book.pdf

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Cite this

@inproceedings{a204b1192b074294857c13bf02b69fac,

title = "In-flight Modal Analysis - A Comparison between Sweep and Turbulence Excitation",

abstract = "At the end of the development cycle, a new aircraft is certified by means of in-flight flutter tests. These tests consist of flying the aircraft at different airspeeds and measuring the accelerations at a limited number of locations on the aircraft structure. The scope is to open the flight domain by verifying that the aircraft does not suffer from aero-elastic instabilities such as flutter. In this paper, some modern frequency-domain modal parameter estimation methods are applied to in-flight data of a large aircraft. Traditional sine sweep excitation was applied at the control surfaces. However, during the test the aircraft passed through a turbulent zone. The sweep excitation was immediately stopped, but the on-board data acquisition system continued to record the aircraft vibration response. After quitting the turbulent zone, the sweep test was reinitiated. The present data thus allows for a comparison between artificial and natural excitation. More specifically, aspects such as data pre-processing, easiness of the parameter extraction process and the accuracy of the results are investigated.",

keywords = "Modal analysis, aerospace, flutter, vibration",

author = "Bart Peeters and \{De Troyer\}, Tim and Patrick Guillaume and \{Van Der Auweraer\}, Herman",

year = "2006",

month = sep,

day = "18",

language = "English",

pages = "1627--1642",

booktitle = "International Conference on Noise and Vibration Engineering ISMA 2006",

note = "Finds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet ; Conference date: 21-09-2009 Through 25-09-2009",

}

Peeters, B, De Troyer, T , Guillaume, P & Van Der Auweraer, H 2006, In-flight Modal Analysis - A Comparison between Sweep and Turbulence Excitation. in International Conference on Noise and Vibration Engineering ISMA 2006. pp. 1627-1642, Finds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet, Stockholm, Sweden, 21/09/09. <http://www.isma-isaac.be/past/conf/isma2006/download/ISMA2006_abstract_book.pdf>

TY - GEN

T1 - In-flight Modal Analysis - A Comparison between Sweep and Turbulence Excitation

AU - Peeters, Bart

AU - De Troyer, Tim

AU - Guillaume, Patrick

AU - Van Der Auweraer, Herman

PY - 2006/9/18

Y1 - 2006/9/18

N2 - At the end of the development cycle, a new aircraft is certified by means of in-flight flutter tests. These tests consist of flying the aircraft at different airspeeds and measuring the accelerations at a limited number of locations on the aircraft structure. The scope is to open the flight domain by verifying that the aircraft does not suffer from aero-elastic instabilities such as flutter. In this paper, some modern frequency-domain modal parameter estimation methods are applied to in-flight data of a large aircraft. Traditional sine sweep excitation was applied at the control surfaces. However, during the test the aircraft passed through a turbulent zone. The sweep excitation was immediately stopped, but the on-board data acquisition system continued to record the aircraft vibration response. After quitting the turbulent zone, the sweep test was reinitiated. The present data thus allows for a comparison between artificial and natural excitation. More specifically, aspects such as data pre-processing, easiness of the parameter extraction process and the accuracy of the results are investigated.

AB - At the end of the development cycle, a new aircraft is certified by means of in-flight flutter tests. These tests consist of flying the aircraft at different airspeeds and measuring the accelerations at a limited number of locations on the aircraft structure. The scope is to open the flight domain by verifying that the aircraft does not suffer from aero-elastic instabilities such as flutter. In this paper, some modern frequency-domain modal parameter estimation methods are applied to in-flight data of a large aircraft. Traditional sine sweep excitation was applied at the control surfaces. However, during the test the aircraft passed through a turbulent zone. The sweep excitation was immediately stopped, but the on-board data acquisition system continued to record the aircraft vibration response. After quitting the turbulent zone, the sweep test was reinitiated. The present data thus allows for a comparison between artificial and natural excitation. More specifically, aspects such as data pre-processing, easiness of the parameter extraction process and the accuracy of the results are investigated.

KW - Modal analysis

KW - aerospace

KW - flutter

KW - vibration

M3 - Conference paper

SP - 1627

EP - 1642

BT - International Conference on Noise and Vibration Engineering ISMA 2006

T2 - Finds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet

Y2 - 21 September 2009 through 25 September 2009

ER -

In-flight Modal Analysis - A Comparison between Sweep and Turbulence Excitation

Abstract

Conference

Keywords

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