调频连续波激光雷达目标相对距离及径向速度信息提取方法

发布时间：2018-01-09 07:09

本文关键词：调频连续波激光雷达目标相对距离及径向速度信息提取方法　出处：《航空学报》2014年02期 　论文类型：期刊论文

【摘要】：利用线性调频连续波(LFM/CW)激光雷达进行测量时,相对运动引起的多普勒效应和信息输出延迟都会造成测量结果偏差。分析了多普勒效应和信息输出延迟对测量的影响,提出了基于偏差抵消原理的相对距离及径向速度信息提取方法,根据测量任务需求对该方法和基于二维傅里叶变换的信息提取方法进行了仿真比较。结果表明:基于偏差抵消的信息提取方法不仅可以在相对径向速度未知的情况下准确提取目标相对距离信息,更可在每个调频周期结束后给出测距结果从而提高测距实时性;相比基于二维傅里叶变换的信息提取方法,当相对径向速度小于750 m/s时,基于偏差抵消的信息提取方法可使得测速偏差减小一个数量级。
[Abstract]:By using the linear frequency modulated continuous wave (LFM/CW) laser radar measurement, relative motion of the Doppler effect and the information output caused by delay will cause the deviation measurement results were analyzed. The Doppler effect and the information output delay for measuring the impact of extraction method is proposed relative distance and the radial velocity deviation principle based on offset information, according to the measurement task the demand of this method and two dimensional information extraction method based on Fu Liye transform are simulated and compared. The results show that the information extraction method based on deviation offset not only can accurately extract the target information in the relative distance between the relative radial velocity did not know, but at the end of each cycle is given after the FM ranging results so as to improve the ranging time compared; the extraction method of two-dimensional Fu Liye transform based on the information, when the relative radial velocity is less than 750 m/s, offset cancellation based on information The extraction method can reduce the velocity deviation of one order of magnitude.

【作者单位】：装备学院航天指挥系;装备学院研究生院;装备学院光电装备系;
【基金】：部级项目~~
【分类号】：V443.2;TN958.98
【正文快照】： 对于空间非合作目标相对测量,当目标距离大于1 km时可依靠地面雷达实现1%的测距精度,也可以使用星载雷达进行测距,但是其功耗和体积开销过大[1];当目标距离为1~1 000 m时,由于测距精度随距离增大迅速下降,光学三角测量仅适用于20 m以内测距[2]。相比之下,激光雷达可以在整个距

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