基于视线角速率的自适应滑模导引规律  

Adaptive Sliding-Mode Guidance Law Using Line-of-Sight Rate Only

作　　者：田源[1] 王俊波 宿敬亚 TIAN Yuan;WANG Jun-bo;XIU Jing-ya(Beijing Institute of Space Long March Vehicle,Beijing 100076,China;Beijing Institute of Electronic System Engineering,Beijing 100854,China)

机构地区：[1]北京航天长征飞行器研究所,北京100076 [2]北京电子工程总体研究所,北京100854

出　　处：《现代防御技术》2020年第2期40-44,49,共6页Modern Defence Technology

摘　　要：针对被动导引头仅能提供视线角速率信息,难以构建有效的攻击机动目标的制导律的问题,利用末制导的初始弹目距离及接近速率,首先设计了一种基于滑模理论的制导律。该制导律能够实现对机动目标的有效攻击,但需要已知目标机动能力上限且制导指令存在抖振现象。为了克服上述制导律中的不足,在新制导律中引入了一个自适应参数项,并通过稳定性分析证明了改进后的自适应滑模制导律在理论上的正确性。改进后的制导律一方面降低了初始弹目距离和接近速率的影响,另一方面增强了视线角速率在拦截过程中的作用,这样在仅使用视线角速率的条件下达到了攻击机动目标的目的。最后,通过拦截2种机动目标的仿真结果进一步说明的该制导律的有效性。Focusing the difficulty of constructing efficient guidance law for law for missile with passive seeker and maneuvering target A new guidance strategy using only the line-of-sight(LOS)rate measurement was proposed for the missiles with passive seekers.The initial relative range,initial closing velocity and their error boundaries were utilized to obtain their estimations according to the missile-target kinematics.A guidance law based on sliding mode control(SMC)theory was firstly presented,in which the boundary of target maneuvering ability is needed and the chattering phenomenon inevitably exists.In order to overcome the disadvantages above,an expression with a time-varying parameter is introduced to the new guidance law and the stability analysis is included.One of the main features of the proposed guidance strategy is that it reduces the influence of the relative range and the closing velocity on the interception and enhances the effect of LOS rate.The performance of the new guidance law was studied via a computer simulation.The effectiveness of the new guidance law was illustrated through intercepting two kinds of maneuvering target successfully.

关 键 词：滑模控制 自适应控制 导引规律 视线角速率 机动目标 

分 类 号：TJ765[兵器科学与技术—武器系统与运用工程]