分布式SAR超分辨成像的卫星编队构形优化设计方法

编队构形设计是分布式卫星系统总体设计的关键问题,提出了一种编队构形优化设计方法。针对主星带辅星群体制分布式合成孔径雷达(SAR)超分辨率任务,从优化系统效能的角度出发,将满足超分辨性能的时间比率和分辨率改善因子作为编队构形优化设计的目标函数,以基线矢量为中间变量,建立了目标函数与编队卫星轨道根数的关系,并采用遗传算法求解。对不同卫星数目的编队系统进行了优化设计仿真,并与干涉车轮和钟摆编队构形方案进行了分析比较,数值结果验证了该优化设计方法的有效性和正确性。该设计方法还可改变优化目标函数,以适应用户的任务要求。

Optimization Design Approach of Formation Flying for Distributed Spaceborne SAR Super-resolution Imaging

The formation configuration design of distributed satellite system is a key issue of(system) design.For the spaceborne parasitical synthetic aperture radar(SAR) which fulfills super-resolution imaging,a generalized approach of formation configuration design is presented from the point of system performance optimization.It is generalized as an optimal problem.The objective function is setted up,based on analyzing system mission.By using baseline vector as intermedium,the relationship of objective function and satellite orbit root is established.A genetic algorithm is used to solve the optimal problem.Formation systems with different number satellite are simulated by the optimal design approach.And system performances of them arecompared with those of(interferometric) Cartwheel and Pendulum.The simulation result provescorrectness and validityof the optimal method.