Abstract: According to the unusual conformation and aerodynamic characteristic of flying-wing UAV, as well as the requirement of control quality, a static projective control system is designed based on robust and optimal theories considering wind disturbance. Both pitch loop of longitudinal motion and bank loop of lateral motion are taken into account with projective controllers. The general principles of projective control are analyzed. Then the robust-servo model is established and an optimal closed loop system is obtained by LQR state feedback method. The eigenvalues and eigenvectors of closed loop system are treated as a reference structure for static projective control. The aim of adopting static projective control is rebuilding the reference structure by output feedback as a substitute for LQR state feedback. The output feedback is used to ensure the measurability of the variables in engineering application. The final simulation acts as a comparison of PID attitude autopilot and static projective controller with three kinds of wind disturbance. The result shows that the designed system has excellent transient performance and satisfactory anti-disturbance ability.

Key words: control science and technology, projective control, robust-servo model, LQR control, flying-wing UAV