基于自适应固定时间的直接升力着舰容错控制  

Fault-Tolerant Control of Direct Lift Carrier Landing Based on Adaptive Fixed Time

作　　者：何胜涛 江驹[1] 余朝军 郇钫策 HE Shengtao;JIANG Ju;YU Chaojun;XUN Fangce(College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211000,China)

机构地区：[1]南京航空航天大学自动化学院,南京211000

出　　处：《电光与控制》2023年第9期29-35,98,共8页Electronics Optics & Control

基　　金：国家自然科学基金(71971115)。

摘　　要：针对执行器效益损失故障、偏移故障和舰尾流扰动,提出了一种直接升力作用下的自适应固定时间容错控制方法。首先,建立了一种新的含襟翼的舰载机精确反馈线性化模型,并基于新的固定时间稳定性定理,对直接升力模态设计了滑模控制器,提升了系统的收敛速度和着舰精度;然后,引入非线性微分方程形式的自适应更新律,在线估计故障因子的最小值和复合扰动上界值,补偿故障和扰动的影响,基于李雅普诺夫方法证明了闭环系统的固定时间收敛特性;最后,与其他方法对比仿真的结果证明了所设计方法的有效性和优越性。To deal with actuator fault of loss of effectiveness,drift fault and air-wake disturbance,an adaptive fixed-time fault-tolerant control method under direct lift is proposed.Firstly,a new precise-feedback linearization model of the carrier-based aircraft with flaps is established,and based on the new fixed-time stability theorem,a sliding mode controller is designed for the direct lift mode,which improves the convergence speed and carrier landing accuracy of the system.Then,an adaptive updating law in the form of nonlinear differential equations is introduced to online estimate the minimum value of the fault factor and the upper bound of the lump disturbance,and compensate for the influence of the faults and disturbance.The fixed-time convergence of the closed-loop system is proved based on Lyapunov method.Finally,a simulation is conducted in comparison with other methods,and the results prove the effectiveness and superiority of the designed method.

关 键 词：舰载机 着舰控制 直接升力控制 容错控制 固定时间控制 

分 类 号：V249.1[航空宇航科学与技术—飞行器设计]