适用于超低空拦截的复合制导律设计方法  

Composite guidance law design method for super-low altitude engagement

作　　者：杨宇 吴达[1] 高峰[1] 邓建军[1] YANG Yu;WU Da;GAO Feng;DENG Jianjun(Air and Missile Defense College, Air Force Engineering University, Xi’an 710051, China)

机构地区：[1]空军工程大学防空反导学院,陕西西安710051

出　　处：《系统工程与电子技术》2021年第1期208-215,共8页Systems Engineering and Electronics

基　　金：国家自然科学基金(61703424)资助课题。

摘　　要：防空导弹在拦截超低空目标时,多径效应的存在会大大降低导弹雷达导引头探测跟踪目标的精度。为降低多径干扰的影响,可将弹目视线角(line of sight,LOS)约束在布儒斯特角附近,但是多数的研究仅仅是在弹目交汇处将其约束至布儒斯特角。基于模型预测控制可跟踪期望LOS的特点,设计出一种模型预测制导律。针对超低空目标机动扰动对制导精度的影响,设计了滑模扰动观测器对目标加速度进行估计。最后,将模型预测制导律与目标加速度的估计值相结合设计了一种复合模型预测制导律。仿真结果表明,采用复合制导律能够保证拦截弹以期望的布儒斯特弹道对超低空目标进行跟踪和拦截,同时可将LOS速率收敛至0,最大程度降低多径干扰的影响,从而提高拦截精度。When the air defense missile intercepts the ultra-low altitude target,the existence of the multipath effect will greatly reduce the detection and tracking accuracy of the missile radar seeker.In order to reduce the influence of the multipath interference,the line of sight(LOS)angle of the missile and target can be constrained near the Brewster angle,but most researches only restrict it to the Brewster angle at the intersection of missile and target.Based on the characteristics that mode predictive control can track expected LOS angle,a mode predictive guidance law is designed.For the influence of the maneuvering disturbance of the super-low altitude targets on the guidance accuracy,the sliding mode disturbance observer is designed to estimate the acceleration of the target.Finally,a composite guidance law is designed based on the estimation of target acceleration and the mode predictive guidance law.And the results show that the composite guidance law can ensure the interceptor track and attack the super-low altitude target by Brewster angle,converge the LOS angular rate to zero,reduce the multipath interference to minimum and improve the interception accuracy.

关 键 词：多径效应 布儒斯特角 模型预测控制 滑模扰动观测器 

分 类 号：TJ765.3[兵器科学与技术—武器系统与运用工程]