共查询到11条相似文献,搜索用时 62 毫秒
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大天区面积多目标光纤光谱望远镜(Large Sky Area Multi-object Optical Spectroscopic Telescope,LAMOST)是目前国际上口径最大、视场最宽、光谱获取率最高的大型施密特望远镜,通过借助并行可控式双回转光纤定位系统,其焦面系统上的4 000根光纤可以在数分钟内按预定天体坐标快速精确地对准各自观测目标并进行精调。望远镜观测时每一个光纤单元定位情况的好坏直接决定接收天体光谱的质量,然而目前针对光纤定位精度情况仅有的信息就是定位时光纤单元步进电机驱动情况的反馈,是一个内部信息,并不全面,无法给出每一个光纤单元的实际定位精度情况。因此需要搭建一个可用于LAMOST现场的检测系统,在望远镜观测间隙,在前置光源照明条件下,可以第一时间获取焦面板光纤单元定位图像,快速分析之后,检测出定位误差较大的光纤单元,由此决定进一步观测处理措施,以保证观测光谱的有效性和准确率。 相似文献
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为测量天线副面并联调整机构的相对位姿,研究了一种基于单目视觉的位姿测量系统.采用光源照射固定于动平台上的合作目标,结合滤光片等控制手段,利用单目相机采集非共面特征点的图像,获得高对比度的准理想图像.经过图像处理和平方加权质心法,提取出特征点的图像坐标,使用EPnP (Efficient Perspective-n-Point)算法进行位姿解算,最终可以得到并联调整机构的相对位姿测量方法.最后通过实验进行了精度验证,结果表明平移精度为0.1 mm,旋转精度为0.05°,满足了实验要求,为并联机构的位姿检测提供了可行性思路. 相似文献
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EPICS是一个用于开发分布式设备控制程序的软件开发框架,它主要用于控制大型物理实验设备及天文望远镜系统,而RTS2是Linux系统上的一个远程自主望远镜控制系统。实现了EPICS与RTS2的集成,用RTS2负责望远镜观测流程控制,EPICS用于成像设备控制,使用EPICS的成像控制软件Area Detector完成了Andor相机的控制,并完成了RTS2和EPICS融合的命令状态接口,从而让RTS2能够兼容EPICS组件。成功用RTS2和EPICS实现了Andor相机的控制,并很好地集成到RTS2的流程控制中。 相似文献
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Nannan Cai Jinlin Han Weicong Jing Zekai Zhang Dejiang Zhou Xue Chen 《天文和天体物理学研究(英文版)》2023,(10):194-202
Artificial intelligence methods are indispensable to identifying pulsars from large amounts of candidates. We develop a new pulsar identification system that utilizes the CoAtNet to score two-dimensional features of candidates, implements a multilayer perceptron to score one-dimensional features, and relies on logistic regression to judge the corresponding scores. In the data preprocessing stage, we perform two feature fusions separately, one for one-dimensional features and the other for two-di... 相似文献
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简述了基于IBOB和Xilinx System Generator平台的射电望远镜宽带数字频谱仪系统的设计与应用;给出了双路400MHz、2048通道、16IP输出数字频谱仪系统的具体设计方案,并对该数字频谱仪器的性能指标进行了分析和测试,验证了方案的可行性;最后初步讨论了滤波器设备对后端系统的影响。 相似文献
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L. L. Sokolov N. A. Petrov A. A. Vasil’ev G. A. Kuteeva A. S. Shmyrov B. B. Eskin 《Solar System Research》2018,52(4):338-346
The possibilities of deflecting an asteroid from its collision course with the Earth by changing its velocity with an impact are considered. Using the asteroid Apophis as an example, the time dependence of the positions and sizes of the keyholes leading to collision is studied. It has been found that the possibility of deflecting this asteroid usually exists, and the impact can be accomplished in principle, given the capabilities of modern space technology. A change in the velocity should be performed before the encounter of 2029 in order to use the gravitational maneuver effect. The possible accuracy of determining Apophis’ orbit and the keyholes that lead to collision and are associated with the resonance returns are considered. 相似文献
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Paul D. Spudis 《Earth, Moon, and Planets》2004,94(3-4):213-219
The new US Vision for Space Exploration is briefly described, with particular emphasis on the place of lunar exploration. The value of humans in the exploration of the Moon is discussed, and it is argued that people offer significant advantages over robots for the purposes of scientific exploration. The Vision provides a new rationale for space activities, one aimed at both broadening our knowledge base and, in the longer term, of increasing prosperity by providing access to the material and energy resources of the Solar System. 相似文献