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Frequency domain analysis and identification of flight vehicle dynamics

Baguiev M.

Research Bulletin / Warsaw University of Technology, Institute of Aeronautics and Applied Mechanics

1998

nr 8

53-58

A new approach to the problem of aircraft motion mathematical model structural-parametrical identification is proposed by using spectral analysis. By applying the Finite Fourier Transform to flight test data, a family of frequency characteristics and then mathematical model parameters estimation are derived. Modeling transients are executed for the purpose of comparison with flight test data. The usefulness of this algorithm is illustrated by applying to real flight test records. Finally, research into the applicability of the developed algorithm in predicting the handling qualities levels ofrotorcraft (ADS-33 C) was conducted.