• VIBRATION ANALYSIS WITH AN OPTICAL TRACKING SYSTEM (SISTRO)

      Kusumoto, Andre Yoshimi; Oliveira Leite, Nelson Paiva; Guarino Vasconcelos, Luiz Eduardo; Netto Lahoz, Carlos Henrique; Instituto de Pesquisas e Ensaios em Voo (IPEV); Instituto Nacional de Pesquisas Espaciais (INPE); Instituto Tecnológico de Aeronáutica (ITA) (International Foundation for Telemetering, 2019-10)
      SisTro validation, required the execution of several Pit Drop tests. The determination of the store trajectory in real time, required the usage of advanced computer vision techniques for photogrammetric measurements and a novel optical calibration and error minimization process. As results the 2D image tracking of the in-view reference points could be determined with sub-pixel resolution. Then, in addition to providing the desired trajectory, it was able to compute the wing and pylon vibrations and its damping coefficient. Such capability allows us to develop a more accurate CFD simulation models by the incorporation of the aircraft Flexible-Body Mechanics model into such simulation runs. In this paper it will be presented the development of SisTrO sub-pixel tracking process and the pit drop test results, that includes the measurement of the wing and pylon vibrations and its associated damping.