METHODS OF ANALYSIS OF FLIGHT VIBRATION MEASUREMENTS

摘要

The first objective is to design systems whose components will not be sub¬ject to severe vibrations in frequency zones of high sensitivity. The second ob¬jective is to devise tests which will establish the reliability of the actual system in the presence of realistic vibrations. In the analysis of the flight wave, it would be desirable to extract the exact Fourier component amplitudes corresponding to each multiple of a low fundamental frequency, and thereby produce an exact mathe¬matical representation of the wave. Techniques which are presently available can-not produce such a representation. Rather, they are limited to finding the sums of the squares of the Fourier coefficients over a given frequency band.