平流层飞艇晃动对艇载雷达回波影响的分析
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摘要
平流层飞艇载雷达系统较之地基雷达针对临近空间目标更具探测优势,但也存雷达探测性能受飞艇运动影响的问题,须结合飞艇的运动特点分析艇载雷达的回波形式。对此,本文从艇载雷达天线阵元的速度差别入手,分别建立了艇载雷达天线阵元的运动计算模型和艇载雷达回波计算模型。根据建立的模型,分析了飞艇晃动对雷达信号的影响,计算了不同因素对天线阵元速度的影响,并分别在天线阵元速度差别最大和最小的情形下进行了回波仿真,结果显示:在飞艇运动状态下,艇载雷达探测效果随目标距离增加而下降,但在不同的探测方向上下降程度是不同的。
Stratospheric airship-laden radar system has more advantages for detect near-space targets than ground-based radars,but there is also the issue of radar detection performance affected by the airship movement,the echo form of the airshipborne radar should be analyzed in the light of the characteristics of the stratospheric airship motion. In this regard,this paper starts with the difference of the speed of airshipborne radar antenna array elements,the calculation model of the airshipborne radar antenna array element motion and the calculation model of the airshipboard radar echo are established respectively. According to the established model,the influence of airship sway on radar signal is analyzed and the influence of different factors on the antenna array element velocity is calculated,echo simulations were respectively carried out with the situation in maximum and minimum antenna element velocity differences,the results show: when the airship in motion,airshipborne radar detection effect decreases with the target distance increases,but the decreases in different detection direction is different.
Stratospheric airship-laden radar system has more advantages for detect near-space targets than ground-based radars,but there is also the issue of radar detection performance affected by the airship movement,the echo form of the airshipborne radar should be analyzed in the light of the characteristics of the stratospheric airship motion. In this regard,this paper starts with the difference of the speed of airshipborne radar antenna array elements,the calculation model of the airshipborne radar antenna array element motion and the calculation model of the airshipboard radar echo are established respectively. According to the established model,the influence of airship sway on radar signal is analyzed and the influence of different factors on the antenna array element velocity is calculated,echo simulations were respectively carried out with the situation in maximum and minimum antenna element velocity differences,the results show: when the airship in motion,airshipborne radar detection effect decreases with the target distance increases,but the decreases in different detection direction is different.
引文
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[4]于哲峰,刘佳琪,刘连元,等.临近空间高超声速飞行器RCS特性研究[J].宇航学报,2014,35(6):713-719.Yu Zhefeng,Liu Jiaqi,Liu Lianyuan,et al.Research on the RCS Characteristics of Hypersonic Near Space Vehicle[J].Journal of Astronautics,2014,35(6):713-719.(in Chinese)
[5]沈杰.平流层飞艇载雷达系统研究[D].成都:电子科技大学,2009:18-20.Shen Jie.Research on Stratospheric Airshipborne Radar System[D].Chengdu:University of Electronic Science and Technology of China,2009:18-20.(in Chinese)
[6]杨跃能,郑伟,闫野,等.平流层飞艇飞行模态分析[J].国防科技大学学报,2015,37(4):57-64.Yang Yueneng,Zheng Wei,Yan Ye,et al.Flight mode analysis for stratospheric airships[J].Journal of National University of Defense Techonlogy,2015,37(4):57-64.(in Chinese)
[7]陈丽,周革,段登平.平流层飞艇变质心姿态运动仿真[J].系统仿真学报,2012,24(12):2434-2438.Chen Li,Zhou Ge,Duan Dengping.Simulation of Movingmass Control of Stratospheric Airship[J].Journal of System Simulation,2012,24(12):2434-2438.(in Chinese)
[8]White J E,Robinett R D.Principal Axis Misalignment Control for Deconing of Spinning Spacecraft[J].Journal of Guidance,Control and Dynamics(S1533-3884),1994,17(4):823-830.
[9]Khoury G A,Gillett J D.Airship technology[M].USA:Cambridge University Press,1999.
[10]Kulczycki E A,Johnson J R,Bayard D S,et al.On the development of parameterized linear analytical longitudinal airship models[C]∥Proceedings of AIAAGuidance,Navigation and Control Conference and Exhibit,Honolulu,Hawaii,2008.
[11]Eric A,Kulczycki S M,Koehler A E,et al.Development of an analytical parameterized linear lateral dynamic model for an aerobot airship[C]∥Proceedings of AIAA Guidance,Navigation,and Control Conference,Oregon,USA,2011.
[12]Etkin B,Reid L D.Dynamics of flight:stability and control[M].3rd ed.USA:Wiley,1996.
[13]商哲然,谭贤四,曲智国,等.高超声速目标雷达检测方法综述[J].现代雷达,2017,39(1):1-8,40.Shang Zheran,Tan Xiansi,Qu Zhiguo,et al.Review on Radar Detection Technology of Hypersonic Targets[J].Modern Radar,2017,39(1):1-8,40.(in Chinese)