交会对接微波雷达大范围高精度测角算法  

Research on Large Range High-precision Angle Measurement Algorithm in RVD Microwave Docking Radar

作　　者：严琪[1] 杨瑞强[1] 踪念科[1] 张蓬[1] 蔡春贵[1] 

机构地区：[1]中国空间技术研究院西安分院,西安710100

出　　处：《中国空间科学技术》2013年第5期43-48,共6页Chinese Space Science and Technology

摘　　要：针对现有交会对接微波雷达测角算法不能同时满足远程与近程目标测量精度问题,提出了一种基于相差复矢量匹配的二维测角算法。在定义了目标函数基础上,利用相差复矢量的酉空间内积特性将二维角度估计问题等效为目标函数最大化的非线性优化过程,规避了线性算法近距离误差大的缺点。数值仿真、机载飞行试验和微波暗室试验都表明,该算法对近程、远程目标的测角精度优于0.12°,且易于实现,有较高的工程应用价值。The traditional angle measurement methods of microwave radar are difficult to satisfy accuracy requirements under the rendezvous and docking near-field conditions. To achieve the high-precision angle measuring in a wide range including near-field as well as far-field, a new algorithm based on phase difference complex vector matching was proposed. Firstly, an object function was defined to quantify the similarity of the phase difference complex vector. Secondly, a nonlinear programming model was established to estimate the azimuth and elevation angles and the solving steps of the model were described in detail. Finally, the results of numerical simulation, airborne flight test and anechoic chamber experiment prove the effectiveness of the algorithm with a high precision of 0.12°.

关 键 词：交会对接 雷达 大范围 相差复矢量匹配 测角 航天器 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]