Longitudinal Direct Lift Control of Carrier-Based Aircraft Automatic Landing based on NTSM-LADRC

In this study, the direct lift control (DLC) method was introduced into the carrier landing control law. The trajectory and attitude decoupling capability of DLC can be used to better track the ideal glide path. However, the final landing process of the carrier-based aircraft was disturbed by the strong carrier air-wake. In order to suppress the air-wake turbulence and improve the robustness of the automatic carrier landing system based on direct lift control (DLC-ACLS), an innovative design of a DLC-ACLS based on nonsingular terminal sliding mode combined with linear active disturbance rejection control (NTSM-LADRC) is proposed. Firstly, a carrier-based aircraft landing model is derived. Secondly, the LADRC method controller is designed, and In order to improve response characteristics of the controller, the nonlinear error feedback control law is designed by combining the NTSMC, and the Lyapunov function is constructed to prove the stability of the closed-loop system. Finally, the NTSM-LADRC-based DLC-ACLS simulation of a carrier-based aircraft is constructed. The simulation results of tracking ideal glide slope show that the anti-disturbance, robustness and tracking accuracy of NTSM-LADRC are better than the traditional LADRC and proportional-integral-derivative (PID) control methods.