Wavelet Analysis of Flight-Test Data on Aeroelasticity
- Magazine Article
- TBMG-35870
- English
A method of computational filtering enables the removal of distortions from flight-test data. The method is built upon and adapts the methods of wavelet-transform analysis to the particular test data. Although this method does not depend on the type of test data or other data to be analyzed, the initial application was to aeroelastic-flight-test data (e.g., accelerometer readings) generated with the help of structural-vibration-excitation systems on the F/A-I8 Systems Research Aircraft (SRA) and the High Alpha Research Vehicle (HARV). Such excitation systems are often essential for enabling system-identification algorithm to resolve stability trends from noisy measurements, inasmuch as atmospheric turbulence generally does not provide excitation of the type needed for determining vibration-mode characteristics.