针对下滑阶段舰尾气流和甲板运动对舰载机的干扰问题，本文结合直接升力技术开展基于预定义时间的增量非线性控制研究，以提高扰动下舰载机的着舰精度。首先，建立了舰载机全状态的非线性运动方程，并根据舰载机的特点，分析了直接升力技术着舰控制策略的机理和优势；其次，提出了一种基于预定义时间的增量控制方法，并基于该方法分别设计了舰载机姿态稳定回路、高度回路以及动力补偿系统的控制器。所设计的直接力自动着舰控制器能够在干扰影响下，确保舰载机状态的跟踪误差在用户设定的时间内一致收敛至可调范围内，从而增强了舰载机对着舰指令以及甲板运动的快速跟踪能力，并能够利用自身的鲁棒性来削弱舰尾气流对舰载机的影响；随后，在李雅普诺夫稳定理论下严格证明了所设计的自动着舰闭环系统的预定义时间稳定性；最后，通过一系列实时仿真验证了所设计自动着舰控制器的有效性和优越性。
To address the disturbance of carrier wake and deck motion, this paper combines direct lift technology and incremental nonlinear control based on predefined-time theory to improve the landing accuracy of carrier-based aircraft. Firstly, the full-state nonlinear dynamic equations of the carrier-based aircraft are established, and the mechanisms and advantages of the direct lift control technology are analyzed. Secondly, an incremental control method based on predefined-time theory is proposed, and an automatic landing controller for the carrier-based aircraft, consisting of the attitude stabilization loop, altitude control loop, and approach power compensation system, is designed based on this method. The designed automatic landing controller ensures that the tracking error of the carrier-based aircraft's state converges to an adjustable bounded range within a predefined time, even under the influence of dis-turbances, which enhances its ability to track landing trajectory commands and deck movements rapidly. Moreover, this controller utilizes its robustness to reduce the impact of the carrier wake on the carrier-based aircraft. Subsequently, the predefined-time stability of the automatic landing closed-loop control system is rigorously proven under the Lyapunov stability theory. Finally, a series of real-time simulations verify its effectiveness and superiority.
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