着陆导航激光多普勒雷达  

Laser Doppler radar for landing navigation

作　　者：舒嵘[1] 凌元[1] 崔桂华[1] 洪光烈[1] 

机构地区：[1]中国科学院上海技术物理研究所空间主动光电技术院重点实验室,上海200083

出　　处：《红外与毫米波学报》2013年第6期508-513,共6页Journal of Infrared and Millimeter Waves

基　　金：国家973计划(2009CB724004)~~

摘　　要：研究了一种可用于着陆导航的全光纤线性调频连续波(LFMCW)-连续波(CW)激光多普勒雷达.以窄线宽激光器作为种子源,利用声光调制器对激光进行频率调制,通过平衡相干探测和基于FPGA的数字信号处理可实时获得航天器相对于天体的矢量速度.基于速度模拟发生器的实验结果表明,该多普勒雷达可获得高于0.05 cm/s的测速精度,同时具有速度方向辨别能力.Precise determination of the relative velocity between the spacecraft and celestial body is necessary to ensure the secure landing in space exploration. An all-fiber linear frequency modulation continuous wave（LFMCW）-continuous wave（CW） Doppler laser radar was developed for landing navigation. A narrow line width laser was used as the seed laser. The laser frequency was modulated by an acousto-optic modulator. Speed vector was measured in real-time by means of balance coherent detection and digital signal processing based on FPGA. Experiments made on laser Doppler radar with a speed generator proved that 0.05cm/s or better accuracy can be achieved while the velocity direction can be discriminated.

关 键 词：激光多普勒 着陆导航 线性调频连续波 方向辨别 激光雷达 

分 类 号：TN247[电子电信—物理电子学]