雷达天线稳定平台轴倾补偿研究  

Research on Axial Tilt Compensation of Radar Antenna Stabilized Platform

作　　者：朱鸿健 周志峰 俞竹青 Zhu Hongjian;Zhou Zhifeng;Yu Zhuqing(School of Mechanical Engineering, Changzhou University, Jiangsu Changzhou 213100, China)

机构地区：[1]常州大学机械工程学院

出　　处：《机械科学与技术》2019年第6期936-941,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：科技部中小企业技术创新基金项目(14C26213201195)资助

摘　　要：雷达天线稳定平台是合成孔径雷达清晰成像和目标跟踪的关键设备。稳定平台零件的加工与装配误差会造成方位与横滚轴倾。根据测得的轴倾角,计算出陀螺仪安装载机内部情况下的矢量变换数学模型,使得伺服控制系统反馈给直流无刷电机的角速度更为精准,雷达天线稳定平台稳定性和可靠性得到提升。雷达天线稳定平台旋转变换模型根据轴倾角进行修正,根据雷达天线稳定平台旋转变换模型在MATLAB中计算出雷达波束指向角度,最终提高合成孔径雷达成像的定位精度,并对雷达波束指向进行误差分析。Radar antenna stabilized platform is the key equipment for synthetic aperture radar (SAR) imaging and target tracking. The machining and assembly errors of stable platform parts will cause azimuth and horizontal rollers to tilt. According to the measured axis inclination angle, the vector transformation mathematical model of gyroscope mounted on the carrier is calculated, which makes the angular velocity feedback more accurate from servo control system to DC brushless motor, and thus improves the stability and reliability of radar antenna stabilized platform. The rotation transformation model of radar antenna stabilized platform is modified according to the axis tilt angle. The radar beam pointing angle is calculated in MATLAB according to the rotation transformation model of radar antenna stabilized platform. Finally, the positioning accuracy of SAR imaging is improved, and the error of radar beam pointing is analyzed.

关 键 词：稳定平台 合成孔径雷达 矢量变换 旋转变换 波束指向 

分 类 号：TN957.8[电子电信—信号与信息处理]