基于预定义时间的舰载机抗干扰着舰控制

Considering the landing trajectory tracking of carrier-based aircraft under the influence of deck motion and ship wake, an adaptive robust control strategy based on predefined-time is proposed. The subsystems for ship trajectory generation, guidance, control, and approach power compensation are established, transforming the trajectory tracking problem into a stability problem for these subsystems. To address the influence of time-varying disturbances caused by ship wake and deck motion on the ideal landing point, a long short-term memory neural network is utilized for deck motion estimation and correct it in the guiding commands, and a nonlinear disturbance observer is designed to estimate unknown disturbances so that the feedforward compensation is performed on the aggregate external disturbance of the model set. To enhance the accuracy and speed of landing trajectory tracking and attitude control, a predefined-time control strategy based on backstepping architecture has been developed. Lyapunov stability analysis demonstrates that the system can converge within the set time. The numerical and hardware-in-loop simulation results indicate that the control strategy designed to account for deck motion and ship wake disturbances can meet the requirements for fast and accurate tracking of landing trajectories while achieving predefined-time stability.