基于分布式IMU的相控阵雷达运动补偿研究  

Phased Array Radar Motion Compensation Based on Distributed IMUs

作　　者：陈璞[1] 吴旭华 李振威 冯鑫涛 张亚崇[1] 程咏梅[2] CHEN Pu;WU Xuhua;LI Zhenwei;FENG Xintao;ZHANG Yachong;CHENG Yongmei(Xi’an Flight Automatic Control Research Institute,Aviation Industry Corporation of China,Xi’an 710065,China;School of Automation,Northwestern Polytechnical University,Xi’an 710129,China)

机构地区：[1]西安飞行自动控制研究所,西安710065 [2]西北工业大学自动化学院,西安710129

出　　处：《弹箭与制导学报》2022年第1期101-105,113,共6页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：针对相控阵雷达阵面挠曲变形导致天线增益损失增加的问题,提出一种基于分布式惯性测量单元(IMU)的阵元相位误差补偿方法。将多个IMU安装在雷达阵面上,首先进行主、子节点间的相对导航解算及通过多节点信息融合实时重建阵面结构;其次利用阵面结构模型计算出每个阵元相位中心的挠曲位移,并对其进行相应的相位误差补偿;最后通过天线增益损失和雷达方向图函数验证所提算法的有效性。仿真结果表明:经过多节点信息融合后,雷达阵面最大挠曲的相对位置解算均方根误差为4.45 mm,对相控阵雷达运动进行实时补偿后,天线增益损失在0.2 dB以下,经过补偿后波束指向精度明显提高。For the problem that the deflection and deformation of the phased array radar causes the antenna gain loss to decrease,this paper proposes a phased error compensation method based on distributed IMUs.First,distributed IMUs installed on the arrayplane are used to perform the relative navigation between the main and sub-nodes,and the array plane deflection model is estimated through multi-node fusion.Then,the deflection displacement of eacharray element is calculated using the defection model to perform phase error compensation.Finally,the performance of the proposed method is verified by antenna gain loss and radar pattern.The simulation results show that the calculated RMSE of the maximum deflection position is 4.45 mm after multi-node fusion.After real-time compensation for the phased array radar,the antenna gain loss is below 0.2 dB,and the beam pointing accuracy is improved.

关 键 词：相控阵 增益损失 相位误差 挠曲变形 多节点信息融合 

分 类 号：V241.622[航空宇航科学与技术—飞行器设计]