AUTHORS: Lucjan Setlak, Rafał Kowalik

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ABSTRACT: The article presents the results of simulation tests assessing the movement dynamics of unmanned aerial vehicle in difficult atmospheric conditions, which is a very strong wind exceeding 120 [km/h]. The results obtained at the simulation research stage were presented in the form of flight trajectory waveforms and changes occurring due to the strong wind. All obtained results were performed for two assumptions, namely windless and windy conditions. The wind strength in the analyzed system was treated as a disturbance of the UAV dynamics, which affected the change of the speed parameter and its position in the atmospheric space, as a consequence of which the flight stability was disturbed. Taking the above into consideration, it was assumed in the research that the obtained results should be carried out in a dynamic manner in order to realize the momentary dynamics of the motion of the tested flying object. The obtained results confirm that if we have accurate slip and angle of attack measurements for UAV, using electronic sensors we can correctly determine the value of the wind speed and the trajectory of the flight. The entire process can be carried out independently of the type of regulators used in the unmanned aerial vehicle control system. The article also presents an overview of other adverse physical phenomena occurring in the atmosphere, having an adverse effect on the UAV flight stability. In the final part of this article, based on simulation studies, the obtained test results were analyzed and practical conclusions were formulated

KEYWORDS: - evaluation, stability, flight trajectory, unmanned aerial vehicle

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