Search results for " UAS"
showing 2 items of 12 documents
An Algorithm for Parameter Identification of UAS from Flight Data
2014
The aim of the present work is to realize an identification algorithm especially devoted to UAS (unmanned aerial systems). Because UAS employ low cost sensor, very high measurement noise has to be taken into account. Therefore, due to both modelling errors and atmospheric turbulence, noticeable system noise has also to be considered. To cope with both the measurement and system noise, the identification problem addressed in this work is solved by using the FEM (filter error method) approach. A nonlinear mathematical model of the subject aircraft longitudinal dynamics has been tuned up through semi-empirical methods, numerical simulations and ground tests. To take into account model nonlinea…
PRELIMINARY DESIGN OF AN INOFFENSIVE FIXED-WING UNMANNED AERIAL SYSTEM
2019
Aim of this paper is the preliminary design of an harmless fixed-wing unmanned Aerial System. To improve application fields, endurance has been selected as fundamental performance and the blended wing configuration has been chosen. So the fuselage has the same airfoil of the wing and contains all the payload. In this way the drag has been reduced. Because of the blended wing arrangement, to control pitch and roll elevons have been introduced. To guarantee the directional stability, winglets have been used; besides winglets increase the equivalent aspect ratio and consequently reduce the drag and improve the endurance. The selected propulsion system has been based on an electrical brushless …