Design and simulation of blending function for landing phase of a UAV

This paper aims to achieve the autonomous landing of unmanned air vehicle (UAV). It mainly deals with glide path design, flare path design, design of blending function, and interfacing the glide and flare paths with the blending function. During transition from glide slope to flare path, a UAV will tend to the unstable region. In a manned aircraft, the pilot controls the unstability that occurs during the change of phase from glide slope to flare, but which is impossible in UAV till now. A blending function has been formulated for use in a UAV to overcome this unstability during transition. This simulation is done with the Matlab Simulink and the results are reported.