Application of a feedforward controller with a disturbance observer for UAV during missile launch

This paper presents a feedforward controller with disturbance observer for UAV (unmanned aerial vehicle), which is able to reduce the disturbance produced by launching missile from UAV. The focus of this work was in two areas. First, according to the layout characteristics of UAV platform, the aerodynamic interference between UAV and external stores was analyzed, and the flight stability and control performance during two ways of external separation were simulated by establishing six degree-of-freedom dynamics and kinematics equations of UAV. Second, the control law was designed by blending the feedforward controller and disturbance observer into the flight control system. The simulation results show that the stability and anti-interference ability of UAV are improved during the missile launch.