上海航天（中英文）2023，Vol.40Issue(6)：83-89,7.DOI:10.19328/j.cnki.2096-8655.2023.06.011
大斜视滑动聚束方位向波束指向控制策略
Azimuth Beam-pointing Control Strategy for Large Squint Sliding Spotlight Mode
摘要
Abstract
When the traditional beam scanning strategy is applied to the squint sliding spotlight mode of spaceborne electronically scanned synthetic aperture radar(SAR),there are usually two problems.One is that the azimuth resolution becomes larger along the azimuth,and the other is that the azimuth scan angle is too large.This paper aims to solve such problems.First,the cause of spatial variation of the azimuth resolution along the azimuth with the traditional squint sliding spotlight scanning strategy is analyzed,and the relationship between the azimuth resolution and the scanning strategy/scanning angle is explored.Then,a squint sliding spotlight beam scanning strategy based on the global search enhanced Whale optimization algorithm is proposed.By controlling the azimuth scanning angular velocity at different moments,the spatial variability of azimuth resolution along the azimuth,the maximum azimuth scan angle of the antenna,and the data acquisition time are reduced,the system cost is effectively reduced,and the system performance is improved.Finally,the effectiveness of the proposed method is verified by simulation.Compared the results obtained by the traditional strategy,the spatial variation of azimuth resolution obtained by the proposed strategy is reduced to less than 1%,and the data acquisition time is reduced by more than 10%.关键词
滑动聚束/波束扫描/分辨率空变/系统代价/全局优化Key words
sliding spotlight/beam scanning/spatial variability of resolution/system cost/global optimization分类
信息技术与安全科学引用本文复制引用
陈郅航,王辉,郑世超,吴思利,汤叶科,王咏祺,张金翼..大斜视滑动聚束方位向波束指向控制策略[J].上海航天（中英文）,2023,40(6):83-89,7.基金项目
国家自然科学基金(U22B2015) （U22B2015）
