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WAVELET ANALYSIS TO CHARACTERISE NON-LINEARITIES AND PREDICT LIMIT CYCLES OF AN AEROELASTIC SYSTEM

✍ Scribed by RICK LIND; KYLE SNYDER; MARTY BRENNER

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 490 KB
Volume: 15
Category: Article
ISSN: 0888-3270
DOI: 10.1006/mssp.2000.1346

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✦ Synopsis

Non-linear dynamics in aeroelastic systems are di$cult to analyse and can induce unpredicted limit cycle oscillations in #ight. This paper introduces wavelet analysis for processing #ight data to extract information about structural non-linearities. Features and trends from wavelet transform maps of transient responses are used to detect and characterise polynomial non-linearities in sti!ness. These features are also used to formulate functions that use transient responses at stable #ight conditions to predict the onset of limit-cycle oscillations.

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