摘要
将SAR成像末制导划分为4个阶段,建立了交接班问题的弹目几何模型,分析了交接班满足的2个条件,即目标被可靠检测和成像斜视角要求;设计了成像交接班转弯弹道,分析了导弹横向机动加速度和预置的成像前置角对交接班耗用时间的影响;采用三维制导律研究了SAR成像到前向打击的交接班,分析了SAR成像时间对总制导时间的影响。仿真结果表明,合理设置成像斜视角,提高聚束SAR成像的检测概率,增大交接班时导弹横向加速度,可有效提高成像交接班成功率;SAR成像时间越长,对目标识别越有利,同时也使末端攻击弹道曲率越大,SAR末制导总的攻击时间越长。
Synthetic aperture radar（SAR） terminal guidance is divided into four stages, geometric model of handover issue is established. The two conditions, i.e. the reliable detecting and right squint angle, are analyzed. Furthermore, the trajectory of image handover is designed, and the influence of the cross acceleration and preset image angle to the starting position of image and handover time is analyzed. Lastly, combined with three-dimension guidance law, handover from SAR image to forward attack is stud- ied, influence of SAR image time to total guidance time is analyzed. Simulation resuhs show that the proper setting of squint angle, to increase detect probability of spotlight SAR, and to increase the missile horizontal acceleration can improve the probability of successful handover. Furthermore, the longer SAR image time is, the better the detection and recognition will be, but it will lead to more winding attack trajectory and much longer guidance time.
出处
《现代防御技术》
北大核心
2012年第6期39-45,共7页
Modern Defence Technology
基金
山东省"泰山学者"建设工程专项经费资助
