Research on Axial Tilt Compensation of Radar Antenna Stabilized Platform
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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。Abstract: 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.
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Key words:
- stabilized platform /
- SAR /
- vector transformation /
- rotation transformation /
- beam pointing /
- stability /
- axis tilt angle
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[1] 刘庆飞.基于DSP的机载稳定平台伺服技术研究[D].西安: 中国科学院研究生院(西安光学精密机械研究所), 2006 http://cdmd.cnki.com.cn/Article/CDMD-80142-2007032503.htmLiu Q F. Research on servo technology of airborne stabilized platform based on DSP[D]. Xi'an: Xi'an Graduate University of Chinese Academy of Sciences (Xi'an Institute of Optics and Fine Mechanics), 2006(in Chinese) http://cdmd.cnki.com.cn/Article/CDMD-80142-2007032503.htm [2] 薛华夏, 俞竹青.某型机载雷达天线稳定平台的设计及有限元分析[J].制造业自动化, 2015(17):120-123 http://d.old.wanfangdata.com.cn/Periodical/zzyzdh201517034Xue H X, Yu Z Q. Design and finite element analysis of a stabilized platform for radar antenna[J]. Manufacturing Automation, 2015(17):120-123(in Chinese) http://d.old.wanfangdata.com.cn/Periodical/zzyzdh201517034 [3] 韦北余.基于机载合成孔径雷达的目标定位技术研究[D].南京: 南京航空航天大学, 2012 http://cdmd.cnki.com.cn/Article/CDMD-10287-1014060799.htmWei B Y. Study on target positioning techniques based on airborne SAR[D]. Nanjing: Nanjing University of Aeronautics and Astronautics, 2012(in Chinese) http://cdmd.cnki.com.cn/Article/CDMD-10287-1014060799.htm [4] 曹正才.雷达波束横倾角计算[J].雷达与对抗, 2011, 31(1):58-60, 64 doi: 10.3969/j.issn.1673-9167.2011.01.015Cao Z C. The calculation of heeling angles of radar beams[J]. Radar & ECM, 2011, 31(1):58-60, 64(in Chinese) doi: 10.3969/j.issn.1673-9167.2011.01.015 [5] 周宏存.机载火控雷达中的坐标变换[J].现代雷达, 2008, 30(5):29-32, 36 doi: 10.3969/j.issn.1004-7859.2008.05.008Zhou H C. Coordinate transformation for airborne fire control radar[J]. Modern Radar, 2008, 30(5):29-32, 36(in Chinese) doi: 10.3969/j.issn.1004-7859.2008.05.008 [6] 陶鑫, 付俊勇, 俞竹青.雷达稳定平台中陀螺仪矢量变换研究[J].常州大学学报, 2012, 24(1):29-32 doi: 10.3969/j.issn.2095-0411.2012.01.008Tao X, Fu J Y, Yu Z Q. Research on vector transformation on stable platform for radar[J]. Journal of Changzhou University, 2012, 24(1):29-32(in Chinese) doi: 10.3969/j.issn.2095-0411.2012.01.008 [7] 黄慕欢, 林茜.正交矩阵在空间坐标变换中的作用[J].高等数学研究, 2009, 12(2):24-26 doi: 10.3969/j.issn.1008-1399.2009.02.006Huang M H, Lin Q. The role of orthogonal matrix in the transformation of spatial coordinates[J]. Studies in College Mathematics, 2009, 12(2):24-26(in Chinese) doi: 10.3969/j.issn.1008-1399.2009.02.006 [8] 曹正才.舰载雷达常用稳定方式坐标变换[J].雷达与对抗, 2010, 30(1):47-52 doi: 10.3969/j.issn.1673-9167.2010.01.011Cao Z C. The commonly used coordinate transformation of stabilization modes for shipborne radars[J]. Radar & ECM, 2010, 30(1):47-52(in Chinese) doi: 10.3969/j.issn.1673-9167.2010.01.011 [9] 苗慧.机载SAR定位精度的研究[D].北京: 中国科学院电子学研究所, 2007 http://www.wanfangdata.com.cn/details/detail.do?_type=degree&id=Y1143071Miao H. Research on airborne SAR geolocation accuracy[D]. Beijing: Institute of Electronics, Chinese Academy of Sciences, 2007(in Chinese) http://www.wanfangdata.com.cn/details/detail.do?_type=degree&id=Y1143071 [10] 于天超, 孙长杰.机载相控阵雷达校靶方法探讨[J].电子测试, 2017(9):49-51 doi: 10.3969/j.issn.1000-8519.2017.09.021Yu T C, Sun C J. Airplane phased array radar calibration method discussion[J]. Electronic Test, 2017(9):49-51(in Chinese) doi: 10.3969/j.issn.1000-8519.2017.09.021 [11] 赵长辉, 段洪伟, 李波, 等.飞机校靶装置技术的发展[J].航空精密制造技术, 2017, 53(2):46-51, 24 doi: 10.3969/j.issn.1003-5451.2017.02.011Zhao C H, Duan H W, Li B, et al. Development of aircraft boresighting equipment technology[J]. Aviation Precision Manufacturing Technology, 2017, 53(2):46-51, 24(in Chinese) doi: 10.3969/j.issn.1003-5451.2017.02.011 [12] 朱岱寅, 朱兆达.机载干涉SAR/ISAR对地面慢速目标成像研究[J].电子与信息学报, 2003, 25(5):585-591 http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dzkxxk200305002Zhu D Y, Zhu Z D. Studies of ground slow-moving target imaging by airborne interferometric SAR/ISAR[J]. Journal of Electronics and Information Technology, 2003, 25(5):585-591(in Chinese) http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dzkxxk200305002 [13] Ausherman D A, Kozma A, Walker J L, et al. Developments in radar imaging[J]. IEEE Transactions on Aerospace and Electronic Systems, 1984, AES-20(4):363-400 doi: 10.1109/TAES.1984.4502060 [14] Stimson G W. Introduction to airborne radar[M]. 2nd ed. Mendham:SciTech, 1998 [15] Oliver C, Quegan S. Understanding synthetic aperture radar images[M]. Boston. London:Artech House, 1998 -
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