导弹末制导过程自抗扰连续2阶滑模导引律设计  

Active Disturbance Rejection Continuous Second-order Sliding Mode Guidance Law for Missile

作　　者：曲悦 易文俊[1] 管军[1] 张文广 袁丹丹[1] QU Yue;YI Wenjun;GUAN Jun;ZHANG Wenguang;YUAN Dandan(National Key Laboratory of Transient Physics,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)

机构地区：[1]南京理工大学瞬态物理国家重点实验室,江苏南京210094

出　　处：《兵工学报》2020年第S01期14-20,共7页Acta Armamentarii

基　　金：中国博士后科学基金项目(2019M651838)。

摘　　要：基于超扭曲算法和非奇异终端滑模理论,提出一种带有落角约束的新型自抗扰连续2阶滑模导引律,有效避免了滑模控制固有的抖振问题且无需牺牲控制系统精度。将目标机动和系统参数摄动看作总干扰项,用所提带有微分跟踪器的非线性扩张观测器对总干扰项进行实时估计,并在2阶滑模导引律中进行前馈补偿,使系统具有极强的抗干扰和抗噪声能力。给出了严格的闭环稳定性证明和详尽的数值仿真结果,证明了该导引律可以预期的落角、极小的脱靶量打击高机动目标。Based on the super-twisting algorithm(STA)and nonsingular terminal sliding mode(NTSM)theory,an active disturbance rejection continuous second-order sliding mode guidance law with terminal angle constraint is proposed,in which the chattering problem inherent in sliding mode control can be completely eliminated without sacrificing the control accuracy.A non-linear extended state observer(ESO)is utilized to online estimate interferences,namely,the unknown target acceleration and the perturbation of the system;consequently feedforward compensation to the system can be achieved by using the estimation value.A modified tracking differentiator(MTD)is also used to improve the antinoise performance of observer.Rigorous closed-loop stability analysis and detailed numerical simulation results demonstrate that the proposed guidance law can accurately intercept a moving target at the predetermined angle.

关 键 词：导弹 超扭曲算法 非线性扩张观测器 自抗扰 连续2阶滑模 导引律 微分跟踪器 

分 类 号：TJ765.31[兵器科学与技术—武器系统与运用工程]