利用捷联导引头打击机动目标的自抗扰制导律设计  

Design of Active Disturbance Rejection Guidance Law for Attacking Maneuvering Target with Strap-down Seeker

作　　者：顾凯 金岳 刘新宇 Gu Kai;Jin Yue;Liu Xinyu(Beijing Aerospace Institute of Microsystems,Beijing 100094,China)

机构地区：[1]北京航天微系统研究所,北京100094

出　　处：《航天控制》2020年第2期38-43,50,共7页Aerospace Control

摘　　要：针对导弹制导系统中存在模型不确定性和目标机动信息难以获取等特点,提出了一种线性自抗扰(LADRC)制导律的设计方法。该方法以捷联导引头弹目视线角为输入量,对控制对象模型已知部分进行前馈补偿,对控制对象模型的不确定部分和目标的未知信息通过线性扩张状态观测器(LESO)进行估计并予以动态补偿,对改造后的系统再利用比例微分(PD)控制,完成制导律的设计。该方法无需获取目标运动加速度即可实现对加速运动机动目标的打击。仿真结果表明,弹道末端需用过载小于导弹的最大可用过载,脱靶量满足指标要求,具有很高的工程应用价值。Aiming at the uncertainties of model and the difficulty of obtaining target maneuvering information in missile guidance system,a method of linear active disturbance rejection control(LADRC)guidance law is proposed.The line-of-sight angle of the strap-down seeker is taken as the input quantity and feed-forward compensation is performed on the known part of the control object model by applying this method.The uncertain part of the control object model and the unknown information of the target are estimated by linear extended state observer(LESO)and compensated dynamically.The improved system is controlled by proportional differential(PD)to complete the design of the guidance law.The method can achieve the impact of the maneuvering target without acquiring the target motion acceleration.The simulation results show that the overload required at the end of the trajectory is less than the maximum available overload of the missile,the miss distance can meet the requirements of the index,and high engineering application value is presented.

关 键 词：机动目标 线性自抗扰制导律 线性扩张状态观测器 PD控制 

分 类 号：TJ765.3[兵器科学与技术—武器系统与运用工程]