基于L1自适应着舰纵向控制与特性分析

Design and Characteristic Analysis of L1 Adaptive Longitudinal Control for Carrier-based Landing

摘要:

考虑到舰载机着舰在最后阶段受到舰尾气流的不利影响。因此，为了提高舰载机着舰控制系统的鲁棒性，提出一种基于L1自适应控制的纵向着舰控制律设计方法。首先，对舰尾流进行分类并将其转化为控制系统的干扰模型，通过分析舰尾气流特性来构建与之相对应的L1自适应控制律结构；然后，基于L1自适应控制方法设计纵向自动着舰控制律，其中包括设计状态观测器、L1自适应控制律、低通滤波器和自适应律，并且对设计好的系统进行了稳定性分析；最后，讨论不同尺度风速的舰尾流对自动着舰系统的影响规律，并且采用“单因素方差分析法”对不同舰尾流环境下的着舰点进行分析。仿真结果表明不同风速下的舰尾流对着舰精度存在一定影响规律，并且所设计基于L1自适应纵向着舰控制律具有较强的自适应性和抗干扰能力。

Abstract:

Considering the carrier-based aircraft affected by various carrier air wake in the final landing stage. Therefore, in order to improve the robustness of the control system of the carrier-based aircraft, L1 adaptive control based automatic landing control law is proposed in the paper. Frist, converting the carrier air wake into disturbance model of the control system and constructing the L1 adaptive control law structure by analyzing the characteristic of carrier air wake. Second, based on the L1 adaptive control method, the longitudinal automatic landing control law is designed, including state observer, L1 adaptive control law, low-pass filter and adaptive law, and the stability of designed control system is analyzed. Last, the influence of the carrier air wake at different scales on t the automatic landing system is discussed, and One-factor Analysis of Variance (One-way ANOVA) analysis method is used to analyze the landing point under different carrier air wakes. The simulation results show that the carrier air wakes at different wind speeds has a certain influence on the accuracy of landing and the designed automatic landing control law based on L1 adaptive control method has strong adaptability and anti-interference ability.