Abstract: This paper introduces the compendium of flight flutter test and the features and specific reguirements of data processing with flight flutter test. It outlines the fundamentals and the basic mathematical model of identifying modal frequency and damping by means of parameter identification with frequency domain and time domain. It emphatically describes appropriate measures taken for solving the contradication with lower signal-to-noise ratio of signal obtained from flight flutter test and higher accuracy of identified modal damping, and for short endng the time of data-analysis.

Key words: flutter, identification of modal parameter, flight test.