The application of Unmanned Aerial Vehicles (UAVs) has rapidly increased since the last years. This approach has been mainly possible due to the increase the computing power of processors. Also UAVs can be used in both civilian and military areas, for example surveillance and intelligence.On the other hand most large unmanned aircraft are remotely controlled by experienced pilots from a ground control station during landing. However, the current human interfaces for remote control present several problems for pilots. UAV pilots from the ground cannot hear the engine, they can’t feel vibrations, acceleration of motion. Since the most difficult phase of the aircraft flight is landing, the major accidents due to human fault are happen in during this phase. Therefore implementation of the autoland system has a great emphasis in UAVs. The thesis introduces an optical system for auto-landing for a UAV that called " SERAJ 110 ". In the first part of the thesis, a dynamic model of the UAV is obtained. The dynamic model is used to establish the stability characteristics of the UAV. Then, an automatic flight control system is designed for the autonomous landing of the UAV. In following, the guidance algorithms in autolanding phase are investigated and the autoland algorithm is determined. By applying the optical and laser system called "BINA", the information of the azimuth and the elevaton of aircraft are derivated and send by ground station data link. Flight computer of the UAV, executs autoland process corresponding to proposed algorithm. Finally the simulation result and hardware in the loop implementation are presented and investigated. The results are demonstrat the capability of suggested method the completely automatically landing process. Key Words Unmanned Air Vehicle, Autolanding, Optic and laser, Autopilot, Hardware In the Loop, Guidance and Control
