Frequency-temporal analysis radar reflections from multirotor drone

Subject and purpose. The frequency-temporal analysis signals of Doppler radar are in-process conducted multirotor drone. The wide use multirotor drone the results in the necessity of arrangement their flights and control after their use. The basic structural feature of such drone is a presence of rotors which provide their motion, the number of which can change depending on a construction.

Methods and methodology. The method experimental researches of the revolved rotors of drone are offered with the use of Doppler radar. Terms and composition of the instrumentation-informative system, in-use during the leadthrough of experiment are described.

Results. It is set as a result of the conducted analysis, that with the increase pulsatance of rotation rotor the period of Doppler signal (DS) diminishes (frequency rises), however fixed frequency DS less than pulsatance of rotation, set from a control of drone stand. Thus, than anymore frequency of rotation, the more difference of these frequencies. The features of structure (forms) DS and their spectrums which are complicated at the increase frequency of rotation rotor and their amount are exposed. The features of DS are investigational at different direction of rotation rotors (in one side or in different) at similar their geometrical location. Influence of direction of rotation is thus rotined on the form of temporal realization of DS and their spectrums.

Conclusion. The exposed differences in form Doppler signals can be in future utillized for recognition type of drone, and also at the construction models of Doppler signals reflected from drone.