Abstract
In the future civilian UAV market, low-altitude low-speed small UAV will obtain a dominant position. In order to achieve small UAV accurate navigation, researchers have devoted lots of efforts on disturbance-model-reference controllers to reject the external wind disturbance. As we all know, accurate modeling helps the efficiency of controller’s parameters. However, almost all the design processes of disturbance-model-reference controllers are based on speed triangle theory which fails to adequately explain the effect of external wind field disturbances on UAV. First, conservation of energy and momentum theory is used to prove that the traditional speed triangle theory is unreasonable to analyze the influence of external wind field on UAV. Then, a more accurate method based on the conservation of energy and momentum theory is proposed to correctly illustrate the effect of wind disturbance on UAV. Finally, two external wind disturbance UAV flight simulation platforms based on speed triangle theory and conservation of energy and momentum theory are implemented separately, showing the big difference between these two types of methods about presenting effect of external wind field on UAV.
Published Version
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