Three-loop Feedback Anti-wind Disturbance Control for The VTOL Aircraft without Vector Thrust

Abstract

The vertical takeoff and landing(VTOL) aircraft without vector thrust can only generate lateral force through attitude adjustment in the takeoff and landing phase. It cannot change the thrust vector to resist lateral wind disturbance. Therefore, its ability of the anti-wind disturbance is weak. For this reason, a new type of anti-wind disturbance control strategy is proposed in this paper. An intermediate loop fed back by the wind disturbance estimator is introduced between the outer loop of position feedback and the inner loop of attitude feedback. The estimation of disturbance acceleration fed back by the intermediate loop corrects the position control command of outer loop feedback so that the thrust control can achieve suppression of the tangential wind disturbance and the inner loop of attitude control can achieve suppression of the lateral wind disturbance. The simulation results show that control strategy proposed in this paper can well estimate and compensate external wind disturbance received by the system.