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In this paper, a new system identification technique of flight characteristic of small unmanned aerial vehicles (UAVs) is proposed. The proposed method is characterized by the use of time-frequency information provided by wavelet transform. The use of wavelet transform enhances robustness against undesirable condition on small UAVs flight, such as wind gust. The effectiveness of the proposed method is validated using flight log obtained by special avionics in real flight of a small UAV. The target small UAV used for the validation and avionics are also introduced for completeness.

This paper will summarize recent research activities on small unmanned aerial vehicles at the University of Tokyo. The topics discussed are: fields of research, unmanned aerial vehicles currently used and under development, and avionics and ground control station software.