非连续干扰和执行器复合非线性下可变翼飞机切换滑模控制  

Switching Sliding Mode Control of Variable Swept-Wing NSV Under Discontinuous Disturbance and Actuator Composite Nonlinearity

作　　者：蒙莉莎 陈晓明[1] 刘家冀 沈丹青 MENG Lisha;CHEN Xiaoming;LIU Jiaji;SHEN Danqing(Nanjing University of Aeronautics and Astronautics,Nanjing 210000 China)

机构地区：[1]南京航空航天大学,南京210000

出　　处：《电光与控制》2025年第3期42-50,共9页Electronics Optics & Control

基　　金：江苏省科技计划专项资金港澳台科技合作项目(BZ2023057)。

摘　　要：针对近空间可变翼飞行器存在非连续干扰、不确定性、执行器死区和饱和非线性的复合问题,提出了一种基于滑模干扰观测器和辅助系统的自适应多模态切换滑模姿态控制器。首先,建立干扰和执行器非线性下飞行器的多模态非线性切换系统模型;然后,针对不确定和非连续干扰,设计一种随模态同步切换的滑模干扰观测器对复合扰动进行估计;针对执行器存在死区和饱和复合非线性,引入死区右逆函数,将复合非线性等效为一个新的饱和环节,构造抗饱和辅助系统加以处理;接着,基于backstepping设计自适应多模态切换滑模面姿态跟踪控制器,不同于传统滑模控制,针对切换系统各个子系统设计不同滑模面,并通过一个过渡滑模面实现共同的坐标变换;利用Lyapunov理论和平均驻留时间法证明了闭环切换系统的稳定性;最后,通过与传统滑模控制对比,验证所提方法的有效性和优越性。To solve the problems of discontinuous disturbance uncertainties actuator dead zone and composite saturated nonlinearity of the variable swept-wing Near Space Vehicle(NSV)an adaptive multi-model switching sliding mode attitude controller based on sliding mode disturbance observer and an auxiliary system is proposed.Firstly a nonlinear multi-model switching system under disturbance and actuator composite nonlinearity is established.Then as for the uncertainties and the discontinuous disturbance a mode-synchronized switching sliding mode disturbance observer is designed to estimate composite disturbance.As for the dead zone and composite saturated nonlinearity of the actuator the dead zone right inversion function is introduced to equivalently transform the composite nonlinearity into a new saturation stage and an auxiliary anti-saturation system is constructed to deal with it.Next an adaptive multi-model switching sliding mode controller for attitude tracking is designed based on backstepping.Different from conventional sliding mode control different sliding surfaces are designed for each subsystem of the switching system and common coordinate transformation is realized through a transitional sliding surface.The Lyapunov theory and the average dwelling time theory are used to prove the stability of the closed-loop switching system.Finally the effectiveness and superiority of the proposed method are verified by comparing it with the conventional sliding mode control.

关 键 词：近空间可变翼飞行器 切换系统 干扰观测器 执行器复合非线性 切换滑模控制 平均驻留时间 

分 类 号：V271.4[航空宇航科学与技术—飞行器设计]