Application of the Fourier transformation to flutter tests

Hammond and Doggett (1976) present the method for determination of a damping coefficient of vibrations in flutter tests in terms of the Fourier transformation. The invented formula for the damping coefficient is complex and demands for many simplifications to be accepted when producing it. It has been proved in the present contribution that the plain and precise formula for the damping coefficient can be invented without any simplifications when employing the Fourier transform. This method has been tested both on the model and the experimental data. It is currently being used in the analysis of flutter characteristics of an aircraft in flight.