Abstract
The flutterometer is an on-line tool that indicates a measure of distance to flutter during a flight test. The measure of distance is computed as a robust flutter margin by applying //-method analysis. The approach is to update the robust flutter margin at a series of test points by analyzing flight data. This paper documents the results of an envelope expansion for the Aerostructures Test Wing that used the flutterometer. Algorithm and implementation details that are critical to the successful application of the tool are discussed. Also, flight data and analysis are presented to demonstrate the properties of the flutterometer for predicting robust flutter speeds.
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