弹载双基前视SAR俯冲段弹道设计方法  

Design method of MBFL-SAR trajectory during terminal diving period

作　　者：孟自强[1] 李亚超[1] 汪宗福[2] 武春风 邢孟道[1] 保铮[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071 [2]中国三江航天集团,湖北武汉430040

出　　处：《系统工程与电子技术》2015年第4期768-774,共7页Systems Engineering and Electronics

基　　金：国家自然科学基金(61001211;61303035);中央高校基本科研业务费(K5051202016)资助课题

摘　　要：导弹在打击复杂背景目标时,现有单基平台末制导手段难以实现对目标的有效分离。作为一种解决方案,将双基前视合成孔径雷达(synthetic aperture radar,SAR)应用于俯冲攻击段,即弹载双基前视SAR(missile-borne bistatic forward-looking SAR,MBFL-SAR),可实现弹载雷达末端俯冲段全程二维高分辨成像、自主寻的精确制导。而在该构型下作为发射机的照射弹轨迹直接制约双基成像分辨率以及制导精度。首先分析了MBFL-SAR俯冲攻击段的分辨率特性,然后提出了基于线性衰减轨迹模型的弹道设计方法,该模型可有效满足成像分辨率要求,且利于双基构型下制导控制。最后,通过仿真结果验证了设计方案的合理性。Existing terminal guidance technologies in monostatic platform cannot distinguish targets effi- ciently when missile attacks targets against complicated background. As a solution, bistatic forward-looking synthetic aperture radar （SAR） is applied to diving and attacking period, Missile borne bistatie forward-looking synthetic aperture radar （MBFL-SAR） could perform two dimensional （2D） high-resolution imaging and passive homing during the whole terminal diving period of missile. The trajectory of irradiating missile acting as trans- mitter has great influence on imaging resolution of bistatic platform and guidance precision. Firstly, the resolu- tion property of the special configuration in diving period is analysed, and then a design method of trajectory based on a linearly attenuating model is developed. This model can satisfy imaging resolution, and is also propi- tious to guidance in bistatie platform. Finally, simulation results show the validity of the proposed method.

关 键 词：弹载双基前视 合成孔径雷达 俯冲攻击段 精确制导 分辨率特性 弹道设计 

分 类 号：TN957[电子电信—信号与信息处理]