典型文献
A Reverse-Design Strategy for the Track Error of the Qi Tai Telescope Based on Pointing Accuracy
文献摘要：
The Qi Tai Telescope(QTT),which has a 110 m aperture,is planned to be the largest scale steerable tele-scope in the world.Ideally,the telescope's repeated pointing accuracy error should be less than 2.5 arc seconds(arcsec);thus,the telescope structure must satisfy ultra-high precision requirements.In this pur-suit,the present research envisages a reverse-design method for the track surface to reduce the difficulty of the telescope's design and manufacture.First,the distribution characteristics of the test data for the track error were verified using the skewness coefficient and kurtosis coefficient methods.According to the distribution characteristics,the azimuth track error was simulated by a two-scale model.The error of the long period and short amplitude was characterized as large-scale and described by a trigonometric function,while the short period and high amplitude error was characterized as small-scale and simulated by a fractal function.Based on the two-scale model,effect of the error on the pointing accuracy was deduced.Subsequently,the relationship between the root mean square(RMS)of the track error and the RMS of the pointing accuracy error of the telescope was deduced.Finally,the allowable RMS value of the track error was derived from the allowable pointing accuracy errors.To validate the effectiveness of the new design method,two typical radio telescopes(the Green Bank Telescope(GBT)and the Large Millimeter Telescope(LMT))were selected as experimental examples.Through comparison,the theoretical calculated values of the pointing accuracy of the telescope were consistent with the measured values,with a maximum error of less than 10％.
文献关键词：
中图分类号：
作者姓名：
Na Li;Baoyan Duan;Xiangyang Li;Bin Zheng;Jiang Wu
作者机构：
Key Laboratory of Electronic Equipment Structure Design,Ministry of Education,Xidian University,Xi'an 710061,China
文献出处：
引用格式：
[1]Na Li;Baoyan Duan;Xiangyang Li;Bin Zheng;Jiang Wu-.A Reverse-Design Strategy for the Track Error of the Qi Tai Telescope Based on Pointing Accuracy)[J].工程（英文）,2022(06):209-216
A类：
envisages
B类：
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AB值：
0.516537
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