In this article, a modified Steiglitz–McBride (SM) structure with variable step size is proposed for aircraft feedforward control to reduce lateral landing deviation in the presence of crosswind disturbance. Currently, most of the aircraft landing studies focus on the trajectory tracking problems in the longitudinal plane and seldom focus on lateral disturbances. This article develops a modified SM structure–based feedforward control system to online estimate both the primary path and the control path (secondary path), where a fuzzy logic–based variable step size strategy is implemented to ensure fast convergence rate and strong robustness under complex crosswind scenarios. As a consequence, the lateral deviation during crosswind landing could be largely reduced as fast as possible while the stability of the flight control system is maintained. A Boeing 747 model is used as a test bed, and the simulations are carried out on two different crosswind conditions to demonstrate the feasibility and effectiveness of the proposed method.

在本文中，提出了一种具有可变步长的改进的Steiglitz-McBride（SM）结构，用于飞机前馈控制，以减小侧风扰动时的侧向着陆偏差。当前，大多数飞机着陆研究都集中在纵向平面上的轨迹跟踪问题上，很少集中在侧向扰动上。本文开发了一种改进的基于SM结构的前馈控制系统，可以在线估计主路径和控制路径（辅助路径），其中实施了基于模糊逻辑的可变步长策略，以确保复杂条件下的快速收敛速度和强大的鲁棒性侧风场景。结果，可以在保持飞行控制系统的稳定性的同时尽可能快地减小侧风着陆期间的横向偏差。