摘要
为了满足LEO对GEO激光通信任务的初始指向快速捕获(Acquisition)、精确瞄准(pointing)及精密跟踪(Tracking)需求。设计了一种卫星舱外的二维激光通信跟瞄转台。首先,根据通信任务需求,确立跟瞄转台的结构形式;其次,依据精密轴系设计理论完成方位俯仰两轴结构设计,并根据轴承支撑理论对周扫式跟瞄转台进行力学特性分析。分析表明本精密轴系能够在方位和俯仰两轴实现10″的跟踪精度,满足通信需求。最后根据赫兹接触理论计算精密轴系轴承在负载状态下的刚度,通过有限元分析软件分析了跟瞄转台的动态刚度及稳定性。经分析验证跟瞄转台能够承受搭载卫星发射条件要求。
In order to meet the requirements of LEO’s initial point-to-point fast capture,precise aiming and precise tracking of GEO laser communication tasks.In this paper,an external two-dimensional laser communication and aiming turntable for satellite space is designed.Firstly,according to the needs of communication tasks,the structure of the round swivel stage with the aiming turntable is established.Secondly,according to the precision shafting design theory,the two-axis design of azimuth pitching is completed,and according to the bearing support theory,the shafting design and analysis are performed on the mechanical characteristics of the entire sweeping-pointing turntable.The calculation and analysis show that the accuracy of the precision shafting can maintain the communication requirements within 10″in both azimuth and pitch.Finally,the stiffness of the precision shaft bearing under load conditions is calculated according to the Hertz contact-contact theory.After simplifying the model,it is analyzed by the finite element analysis software.The dynamic stiffness and stability of the round swivel table are analyzed and verified that the round swivel table can withstand the requirements of the launch satellite launch conditions.
作者
孙赫阳
张立中
杨翘楚
张轶群
陶天奇
SUN Heyang;ZHANG Lizhong;YANG Qiaochu;ZHANG Yiqun;TAO Tianqi(National and Local Joint Engineering Research Center of space Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130022;Fundamental Science on Spare-Ground Laser Communication Technology Laboratory,Changchun University of Science and Technology,Changchun 130022;School of Mechatronic Engineering,Changchun university of science and technology,Changchun 130022)
出处
《长春理工大学学报（自然科学版）》
2018年第5期28-32,共5页
Journal of Changchun University of Science and Technology(Natural Science Edition)
关键词
激光通信
周扫转台
粗跟踪
laser communication
coarse tracking assembly
coarse tracking
