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Automatic landing control technology based on improved direct lift

Aiming at the problems of small bandwidth, phase lag and high coupling in the longitudinal control system of traditional fixed wing UAV, from the control architecture and control strategy, this paper proposes a direct lift control based on nonlinear dynamic inverse/disturbance observation realizing the design of direct lift model and vertical fuselage transition model. This paper improves the direct lift control system from two aspects: the design of lift mode and the design of observer. The simulation results prove that the designed direct force control strategy has strong robustness and landing accuracy. Advanced features have greatly improved the success rate of automatic landing of carrier-based aircraft.