Robust Large-Angle Attitude Maneuver Strategy Design of UCAV

This paper aims to design a large-angle attitude control strategy for unmanned combat aerial vehicle (UCAV), achieving not only robust attitude maneuver but also unmodeled disturbance torques attenuation. Based on a nonlinear coordinate transformation presented in SO(3) we proposed, an attitude error system is established for the problem solving. Unmodeled disturbance torques attenuation and large-angle rotational control are achieved by means of ISS-based high-gain controller design method. Besides, the controller we proposed has robustness with respect to uncertain parameters of UCAV. A numerical simulation result is illustrated to demonstrate the effectiveness of the proposed strategy.