The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper introduces the reasoning and concepts behind a generic and modular approach to obstacle avoidance based on geofencing. The issue of UAV safety is tackled from a practical point of view and a collision avoidance system based on practical usage and safety considerations is presented. Before doing so, the need for a reference model of geographic geometry is discussed, looking at global positioning...
In this paper, we investigate the problem of the dynamics of a quadrotor unmanned aerial vehicle undergoing impact with its environment. This work is motivated by the fact that operation of UAVs (manual or autonomous) carries with it a significant risk of collision with surrounding objects, particularly in unknown, unstructured environments. To make small UAVs more viable and expand their autonomy,...
This article presents a structural analysis of the Unmanned Aerial System UAS-S4 ETHECATL. The mass and the center of gravity position are numerically determined and further experimentally verified using the “pendulum method”. The numerical estimations are computed through Raymer statistical-empirical method coupled with mechanical calculations. The mass of the UAS-S4 component are estimated according...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.