激光导引头对目标测角精度的研究  

Research on Angular Measurement Accuracy of Laser Seeker

作　　者：宿天桥 张合新 刘志国 徐炜波 SU Tianqiao;ZHANG Hexin;LIU Zhiguo;XU Weibo(Rocket Force Engineering University ,Xi'an 710000 China)

机构地区：[1]火箭军工程大学,西安710000

出　　处：《电光与控制》2021年第10期21-25,35,共6页Electronics Optics & Control

基　　金：国家自然科学基金(61673017,61673386)。

摘　　要：激光探测器精确测量目标的方位角是导引头导向目标的必要条件,当前缺乏对该精度的理论研究,因此针对激光导引头的测角精度进行了研究。首先建立了制导激光的大气传输模型,并验证了导引头激光探测器接收到的制导信号光斑为均匀光斑;而后基于激光探测器检测目标方位角的基本原理,推导了目标方位角检测精度与光斑半径、光斑中心位置和信噪比的关系;最后通过仿真分析了不同因素对目标方位角检测精度的影响。结果表明:减小光斑半径、缩短光斑质心到光敏面中心的距离、增大探测器光学系统焦距、提高信噪比,均可以提高导引头对目标的测角精度。Accurate azimuth measurement by laser detectors is a necessary condition for the seeker to guide towards the targetbut there is few theoretical research on the measurement accuracyso this paper studies the angular measurement accuracy of laser seeker.Firstlyan atmospheric transmission model of the guidance laser is establishedand it is verified that the light spot of the guidance signal received by laser detectors is uniform.Thenbased on the basic principles of azimuth detection by laser detectorsthe relationship between azimuth detection accuracy and three factorsi.e.the radius of the light spotthe position of the spot's center and Signal-to-Noise Ratio(SNR)is deduced.Finallythe influence of different factors on azimuth detection accuracy is analyzed through simulation.The results show that angular measurement accuracy of the seeker can be improved by the following four methodsi.e.reducing the radius of the light spotshortening the distance between the centroid of the light spot and the center of the photosensitive surfaceincreasing the focal length of the detector's optical systemand increasing the SNR.

关 键 词：激光制导 四象限探测器 检测精度 光斑 

分 类 号：TN977[电子电信—信号与信息处理]