UAV Autopilot Designing and Simulation in Longitudinal Motion Approaching to FLC

In this paper, the designing and simulation of an unmanned aerial vehicle (UAV) autopilot system using Fuzzy Logic Controller (FLC) is studied. At first the UAV mathematical model is explained by dynamic equations. Then, the FLC is designed considering the controller output variables, their range changes and the controller effects on the UAV are simulated. The controller is able to control the UAV automatically in specified track and height selected by the user by controlling the levels command and the aircraft speed. The controller is designed in such a way that would be used without changing the overall control algorithm. It can be used for most of UAVs just with small changes.