摘要
针对星载光子探测激光雷达在小接收视场及低背景噪声的应用条件和在轨高精度收发同轴匹配的需求,文章提出利用精密光束指向调整机构,实现星载光子探测激光雷达在轨实时调整收发同轴。重点介绍了基于柔性铰链支承的二维精密光束指向调整机构及其在激光雷达上的应用情况;基于在二维精密光束指向调整机构指向镜中心建立的空间坐标系及反射定律矢量表达式,推导了二维光束指向调整机构的出射光束方向与指向镜偏转角度关系式;分析获得了出射光线扫描范围与入射角的关系及出射光线偏转角度与指向镜偏转角的关系式;揭示了在轨收发同轴调整时指向镜偏转角度的计算方法以及二维光束指向调整机构的扫描行程计算公式和扫描角度分辨率计算公式。为精密光束指向调整机构的关键部件的设计选型及误差分析提供一定的依据,对后续星载光子探测激光雷达的收发匹配设计有一定的参考意义。
The planar fast steering mechanism based on the flexure hinge was proposed to satisfy the boresight alignment requirements of the spaceborne photon detection lidar with small receiving field of view and low background noise. The overseas application of planar fast steering mechanism based on the flexure hinge on the laser radar was introduced. Firstly, the relational expression between the direction of emitted light and the deflection angle of pointing mirror was derived based on the law of reflection and the space coordinate system on the center of the pointing mirror. Secondly, the relationship between the scanning scope of emitted light and the incident angle and the relationship between the deflection angle of emitted light and the deflection angle of pointing mirror were analyzed. Then, the computing method of deflection angle of pointing mirror with on-orbit boresight alignment adjustment was also revealed. Finally, the scanning distance and scanning angle resolution of planar fast steering mechanism were also investigated. These research results can provide some theoretical basis for the key parts design in planar fast steering mechanism, which has some referenced value on the subsequent boresight alignment design of spaceborne photon detection lidar.
作者
张晨阳
王春辉
战蓝
齐明
ZHANG Chenyang;WANG Chunhui;ZHAN Lan;QI Ming(Beijing Institute of Space Mechanics & Electricity, Beijing 100094, China)
出处
《航天返回与遥感》
CSCD
2019年第5期84-94,共11页
Spacecraft Recovery & Remote Sensing
基金
国家重大科技专项工程
关键词
指向调整机构
激光雷达
光子探测
航天遥感
fast steering mechanism
lidar
photon detection
space remote sensing
