FAST全站仪测量时滞处理方法研究  

Research on FAST total station measurement time delay prediction

作　　者：袁卉[1] 朱丽春[1] 于东俊[1] 宋本宁 邓申雄 Yuan Hui;Zhu Lichun;Yu Dongjun;Song Benning;Deng Shenxiong(National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China)

机构地区：[1]中国科学院国家天文台,北京100101

出　　处：《国外电子测量技术》2023年第6期117-121,共5页Foreign Electronic Measurement Technology

基　　金：国家重点研发计划项目(2019YFB1312705);国家自然科学基金(42074013,42274055)项目资助。

摘　　要：500 m口径球面射电望远镜(FAST)作为我国的“十一五”重大科学工程,2016年9月25日竣工,是世界上最大的单口径射电望远镜。全站仪采用激光测量,具有测量精度高的优点,作为FAST的主要测量设备,对FAST馈源舱在高空140 m、口径206 m球冠面运动范围内进行精密实时动态跟踪测量。首先通过对全站仪的测量时滞和测量频率进行检测,评估了全站仪的实时动态测量性能,创新的采用基于新息重组的状态预估方法来消除全站仪的测量时滞,建立时滞系统的状态预测估计模型,通过状态估计和模型预测来消除时滞对测量精度的影响,经测试,应用该方法的目标位置测量精度可以提升85%以上,充分验证了这种方法的有效性,能够更好地提升FAST观测性能。As one of the major scientific projects of China's 11th Five-Year Plan,Five-hundred-meter aperture spherical Radio Telescope is the largest single-aperture radio telescope in the world,which was completed on September 25,2016.Because the total station has the advantage of high measurement accuracy,it is used to carry out precise real-time dynamic tracking and measurement of the FAST feed cabin within the motion range of the spherical crown surface at an altitude of 140 m and a diameter of 206 m as the main measuring equipment of FAST.In this paper,the real-time dynamic measurement performance of the total station is evaluated by detecting the measuring time delay and measuring frequency of the total station.The state prediction method based on new information recombination is innovatively adopted to eliminate the time delay of the total station,and the state prediction and estimation model of the time delay system is established.The influence of time delay on the measurement accuracy is eliminated by state estimation and model prediction.The accuracy of target position measurement by this method can be improved by more than 85%,which fully verifies the effectiveness of this method and can better improve the performance of FAST observation.

关 键 词：FAST 时滞预测 全站仪 测量 

分 类 号：P204[天文地球—测绘科学与技术]