Settlements of foundation and track of TM65 m and its effect on antenna pointing

Fu Li; Ling Quanbao; Zhao Rongbing; Qian Zhihan; Qian Hongliang; Gou Wei; Guo Wen; Fan Qingyuan; Liu Qinghui

doi:10.3788/IRLA201645.1117006

Volume 45 Issue 11

Dec. 2016

Turn off MathJax

Article Contents

Article Navigation > Infrared and Laser Engineering > 2016 > 45(11): 1117006-1117006(7)

Fu Li, Ling Quanbao, Zhao Rongbing, Qian Zhihan, Qian Hongliang, Gou Wei, Guo Wen, Fan Qingyuan, Liu Qinghui. Settlements of foundation and track of TM65 m and its effect on antenna pointing[J]. Infrared and Laser Engineering, 2016, 45(11): 1117006-1117006(7). doi: 10.3788/IRLA201645.1117006

Citation:

Fu Li, Ling Quanbao, Zhao Rongbing, Qian Zhihan, Qian Hongliang, Gou Wei, Guo Wen, Fan Qingyuan, Liu Qinghui. Settlements of foundation and track of TM65 m and its effect on antenna pointing[J]. Infrared and Laser Engineering, 2016, 45(11): 1117006-1117006(7). doi: 10.3788/IRLA201645.1117006

Settlements of foundation and track of TM65 m and its effect on antenna pointing

doi: 10.3788/IRLA201645.1117006

1.
Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;
2.
Key Laboratory of Planetary Sciences,Chinese Academy of Sciences,Nanjing 210008,China;
3.
Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210008,China;
4.
Harbin Institute of Technology,Weihai Campus,Weihai 264209,China

Received Date: 2016-03-11
Rev Recd Date: 2016-04-10
Publish Date: 2016-11-25

Abstract

The area built TianMa telescope (in brief, TM65 m hereafter) belongs to soft soil layer. Consequently, in order to keep the high level pointing accuracy, it is necessary to build steady foundation to support the high accurate azimuth track. Based on the closed method, the accuracy of foundation settlements and track was measured by the precise leveling survey system for total 11 times from July 2012 to July 2015. The results show that the foundation tends to even settlement and the root mean square error of the track surface is 0.47 mm. At the same time, the results also show that there are relevant between foundation settlements and track heights with variation of the azimuth angle, which illustrates that the foundation settlements directly affect on the track accuracy. In addition, the methods of experiment, simulation and theory were combined to analyze the azimuth axis errors induced by the track unevenness in the eas-west and sout-north direction. Firstly, the measured track data were linear interpolated and, at some azimuth angle, the heights of some 6 supporting points of azimuth wheels were extracted. Then, the constrained boundary conditions of height differences were applied to the finite element model. Finally, the azimuth axis tilts at different azimuth angles were obtained by simulating. Simultaneously, the track unevenness was measured by inclinometer. The relationship between the azimuth axis tilt and corresponding azimuth angle and the x and y data measured by inclinometer was established and the curve of the variation of the azimuth axis tilt with the azimuth angle was achieved. The simulation results show a good agreement with the theoretical analysis and the effect of track unevenness on the pointing accuracy is within 4 arcsec, which provides basis for the pointing model modification.
- antenna structure,
- foundation settlement,
- track surface accuracy,
- pointing accuracy

References

[1]	Liu Guoxi, Zheng Yuanpeng. Report on design of Shanghai 65 m antenna structure[R]. Shijiazhuang:CETC54, China, 2009. (in Chinese)刘国玺, 郑元鹏. 上海65 m射电望远镜天线方案设计报告[R]. 石家庄:中国电子科技集团公司第五十四研究所, 2009.
[2]	Robert A, Arthur S, Dennis E. Replacement of the green bank telescope azimuth track[C]//SPIE, 2008, 63(14):3026-3030.
[3]	Wielebinski R. The effelsberg 100-m radio telescope[J]. Naturwissenschaften, 1971, 58(3):109-116.
[4]	Joseph A, Frank W K. Precision continuous high-strength azimuth track for large telescopes[C]//SPIE, 2003, 4840:612-623.
[5]	Wodek G, Farrokh B, Eric G. Track-Level-Compensation look-up table improves antenna pointing precision[C]//SPIE, 2006, 6273:1-9.
[6]	Maneri E, Gawronski W. A method and a graphical user interface for the creation of an azimuth-track-level look-up table, TMO progress report[R]. California:Jet Propulsion Laboratory, 2000.
[7]	Juan P, Ute L, Rainer M. Pointing with the IRAM 30 m telescope[C]//SPIE, 2000, 4015:632-640.
[8]	Kim C. The GBT pointing model PTCS Project Note 63.0[C]//Green Bank:NRAO, 2008.
[9]	Tonino P, Franco B, Sergio P, et al. The SRT inclinometer for monitoring the rail and the thermal gradient effects on the alidade structure[C]//SPIE, 2014, 9145(28):72-78.
[10]	Jiang Zhengyang, Kong Deqing, Zhang Hongbo, et al. Pointing calibration method of radio telescope considering track nonlinear levelness[J]. Astronomical Research Technology, 2015, 12(4):417-423. (in Chinese)姜正阳, 孔德庆, 张洪波, 等. 考虑轨道不平度的射电望远镜指向修正方法[J]. 天文研究与技术, 2015, 12(4):417-423.
[11]	Kong Deqing, Wang Songgen, Wang Jinqing, et al. A new calibration model for pointing a radio telescope that considers nonlinear errors in the azimuth azis[J]. Research in Astronomy and Astrophysics, 2014, 14(6):733-740.
[12]	中国有色金属工业协会. GB 50026-2007工程测量规范[S]. 北京:中国计划出版社, 2008.
[13]	Zhao Yan. Research on modeling analysis and design of pointing errors for large radio telescope[D]. Xi' an:Xidian University, 2008. (in Chinese)赵彦. 大型射电望远镜指向误差建模分析与设计研究[D]. 西安:西安电子科技大学, 2008.
[14]	Guiar C N, Lansing F L. Antenna pointing systematic error model derivations, TDA Progress Report 42-88[R]. California:Jet Propulsion Laboratory, 1986.
[15]	Qian Hongliang, Liu Yan, Fan Feng, et al. Surface precision analysis on main reflector of 65 m antenna structure[J]. Infrared and Laser Engineering, 2012, 41(11):3027-3033. (in Chinese)钱宏亮, 刘岩, 范峰, 等. 65 m天线结构主反射面面形精度分析[J]. 红外与激光工程, 2012, 41(11):3027-3033.
[16]	Wodek G, Farrokh B, Ofelia Q. Azimuth track level compensation to reduce blind pointing errors of the deep space network antennas[J]. IEEE Antennas Propagation Magazine, 2000, 42(2):28-38.

Proportional views

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Get Citation

PDF

XML

Article Metrics

Article views(523) PDF downloads(86) Cited by()

Proportional views

Settlements of foundation and track of TM65 m and its effect on antenna pointing

1. Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;

2. Key Laboratory of Planetary Sciences,Chinese Academy of Sciences,Nanjing 210008,China;

3. Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210008,China;

4. Harbin Institute of Technology,Weihai Campus,Weihai 264209,China

Received Date: 2016-03-11

Rev Recd Date: 2016-04-10

Publish Date: 2016-11-25

Key words:

Abstract: The area built TianMa telescope (in brief, TM65 m hereafter) belongs to soft soil layer. Consequently, in order to keep the high level pointing accuracy, it is necessary to build steady foundation to support the high accurate azimuth track. Based on the closed method, the accuracy of foundation settlements and track was measured by the precise leveling survey system for total 11 times from July 2012 to July 2015. The results show that the foundation tends to even settlement and the root mean square error of the track surface is 0.47 mm. At the same time, the results also show that there are relevant between foundation settlements and track heights with variation of the azimuth angle, which illustrates that the foundation settlements directly affect on the track accuracy. In addition, the methods of experiment, simulation and theory were combined to analyze the azimuth axis errors induced by the track unevenness in the eas-west and sout-north direction. Firstly, the measured track data were linear interpolated and, at some azimuth angle, the heights of some 6 supporting points of azimuth wheels were extracted. Then, the constrained boundary conditions of height differences were applied to the finite element model. Finally, the azimuth axis tilts at different azimuth angles were obtained by simulating. Simultaneously, the track unevenness was measured by inclinometer. The relationship between the azimuth axis tilt and corresponding azimuth angle and the x and y data measured by inclinometer was established and the curve of the variation of the azimuth axis tilt with the azimuth angle was achieved. The simulation results show a good agreement with the theoretical analysis and the effect of track unevenness on the pointing accuracy is within 4 arcsec, which provides basis for the pointing model modification.

HTML

Reference (16)

[1]	Liu Guoxi, Zheng Yuanpeng. Report on design of Shanghai 65 m antenna structure[R]. Shijiazhuang:CETC54, China, 2009. (in Chinese)刘国玺, 郑元鹏. 上海65 m射电望远镜天线方案设计报告[R]. 石家庄:中国电子科技集团公司第五十四研究所, 2009.
[2]	Robert A, Arthur S, Dennis E. Replacement of the green bank telescope azimuth track[C]//SPIE, 2008, 63(14):3026-3030.
[3]	Wielebinski R. The effelsberg 100-m radio telescope[J]. Naturwissenschaften, 1971, 58(3):109-116.
[4]	Joseph A, Frank W K. Precision continuous high-strength azimuth track for large telescopes[C]//SPIE, 2003, 4840:612-623.
[5]	Wodek G, Farrokh B, Eric G. Track-Level-Compensation look-up table improves antenna pointing precision[C]//SPIE, 2006, 6273:1-9.
[6]	Maneri E, Gawronski W. A method and a graphical user interface for the creation of an azimuth-track-level look-up table, TMO progress report[R]. California:Jet Propulsion Laboratory, 2000.
[7]	Juan P, Ute L, Rainer M. Pointing with the IRAM 30 m telescope[C]//SPIE, 2000, 4015:632-640.
[8]	Kim C. The GBT pointing model PTCS Project Note 63.0[C]//Green Bank:NRAO, 2008.
[9]	Tonino P, Franco B, Sergio P, et al. The SRT inclinometer for monitoring the rail and the thermal gradient effects on the alidade structure[C]//SPIE, 2014, 9145(28):72-78.
[10]	Jiang Zhengyang, Kong Deqing, Zhang Hongbo, et al. Pointing calibration method of radio telescope considering track nonlinear levelness[J]. Astronomical Research Technology, 2015, 12(4):417-423. (in Chinese)姜正阳, 孔德庆, 张洪波, 等. 考虑轨道不平度的射电望远镜指向修正方法[J]. 天文研究与技术, 2015, 12(4):417-423.
[11]	Kong Deqing, Wang Songgen, Wang Jinqing, et al. A new calibration model for pointing a radio telescope that considers nonlinear errors in the azimuth azis[J]. Research in Astronomy and Astrophysics, 2014, 14(6):733-740.
[12]	中国有色金属工业协会. GB 50026-2007工程测量规范[S]. 北京:中国计划出版社, 2008.
[13]	Zhao Yan. Research on modeling analysis and design of pointing errors for large radio telescope[D]. Xi' an:Xidian University, 2008. (in Chinese)赵彦. 大型射电望远镜指向误差建模分析与设计研究[D]. 西安:西安电子科技大学, 2008.
[14]	Guiar C N, Lansing F L. Antenna pointing systematic error model derivations, TDA Progress Report 42-88[R]. California:Jet Propulsion Laboratory, 1986.
[15]	Qian Hongliang, Liu Yan, Fan Feng, et al. Surface precision analysis on main reflector of 65 m antenna structure[J]. Infrared and Laser Engineering, 2012, 41(11):3027-3033. (in Chinese)钱宏亮, 刘岩, 范峰, 等. 65 m天线结构主反射面面形精度分析[J]. 红外与激光工程, 2012, 41(11):3027-3033.
[16]	Wodek G, Farrokh B, Ofelia Q. Azimuth track level compensation to reduce blind pointing errors of the deep space network antennas[J]. IEEE Antennas Propagation Magazine, 2000, 42(2):28-38.

Settlements of foundation and track of TM65 m and its effect on antenna pointing

doi: 10.3788/IRLA201645.1117006

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Related

Proportional views