Abstract:To overcome the characteristic of “backhoe”, reduce the burden of pilots control, and improve the accuracy and safety of carrier landing, the direct lift control method with the characteristics of quick response and high accuracy, is introduced into the carrier landing control law. A two-level integrated landing controller is designed with the combination of prescribed performance nonlinear dynamic inversion and control allocation algorithm, which considers the decoupling not only between longitudinal trajectory control and attitude control but (also) between horizontal control and longitudinal motion. Firstly, the 6-DoF nonlinear model of aircraft is established. Then the dynamic inverse loop is connected with the control allocation loop organically by setting the intermediate virtual control vector. Meanwhile, the control performance of the dynamic inverse control loop is improved by prescribing the error vector constraint equation. Finally, the simulation results show that the designed direct lift controller can adjust the vertical path while keeping the angle of attack and flight speed stable, and allow the aircraft keep the altitude while aligning with the center line. This study indicates that the designed direct lift control system can achieve a one-by-one correspondence between pilot maneuvers and control variables, improve the efficiency of trajectory control in carrier landing, and greatly reduce the burden of pilot.