期刊文献+

重力作用下天线反射面变形及其调整角度的确定 被引量:13

Gravity deformation and best rigging angle for surface adjustment of large reflector antennas
下载PDF
导出
摘要 以结构力学分析为基础,根据最佳吻合抛物面的概念,应用矢量叠加原理推导出了大型天线反射面重力变形随俯仰角变化的数学表达式。针对天线表面精度在某仰角调整好而在另一仰角变差的问题,给出了求解反射面精度最佳调整角的优化计算方法。通过分析某工程12m圆抛物面天线在多工况下的表面误差,及其与ANSYS软件计算结果的比较,证明了所推公式的正确性。数值计算结果表明:此方法能够得到合理的重力预调角。在工程上应用此方法设计和建造大型反射面天线,可提高反射表面的精度,改善天线系统的整体性能。 A gravity deformation model was derived by superposition which described the main reflector distortion over the entire range of elevation angles. The corresponding formulae were also deduced based on the analysis of antenna structure. In accordance with convention, the distortion of the antenna surface was considered with respect to the best-fit paraboloid. Reflector surface accuracy decreased due to the gravity contribution to the distortion of the surface. An optimization method was presented to calculate the best rigging angle for reflector surface accuracy. To verify the present equations, a finite element model of 12 m parabolic antenna structure was created and input to the ANSYS program for numerical simulation. The surface distortion under seven elevation angles were computed with comparing the simuation results with ANSYS software method. The data and the figures have demonstrated that the present model is correct and the method is reasonable. Its application in design and construction of large reflector antennas will improve the surface accracy and the whole performance of the antenna.
出处 《电波科学学报》 EI CSCD 北大核心 2008年第4期645-650,698,共7页 Chinese Journal of Radio Science
基金 国家自然科学基金(50475171) 国家安全重大基础研究计划项目(No.61358)
关键词 反射面天线 表面精度 最佳吻合面 最佳调整角 reflector antenna surface accuracy best-fit paraboloid best rigging angle
  • 相关文献

参考文献13

  • 1S von Hoerner. Homologous Deformations of Tiltable Telescopes[J]. J. Structural Division Proc. ASCE, 1967, 93: 461-486. 被引量:1
  • 2S von Hoerner, Woon-Ying Wong. Gravitational Deformation and Astigmatism of Tiltable Radio Telescopes[J]. IEEE Transactions on Antennas and Propagation, 1975, 23(5):689-695. 被引量:1
  • 3A Greve, R Neri, A Sievers. The Gain Elevation correction of the IRAM 30m Telescope[J]. Astronomy Astrophysics Supplements Series, 1998, 132(33) :413- 416. 被引量:1
  • 4R Levy. Antenna Rigging Angle Optimization within Structural Member Size Design Optimization [R]. NASA JPL Technical Report, TR32-1526, 1970, 81- 87. 被引量:1
  • 5R Levy. Antenna Bias Rigging for Mission-Dependent performance Objective [R]. NASA JPL Deep Space Network Progress Report, PR42-20, 1974, 112-120. 被引量:1
  • 6S Katow, C N Guiar. Potential Surface Improvements by Bump Removal for 64-m Antenna[R]. NASA TDA Progress Report, PR42-76,1984,59-72. 被引量:1
  • 7D Woody. Gravitational deflection of the Leighton telescopes[A]. Kona Symposium on Millimetre and Submillimetre Astronomy, G D Watt and A S Webster, Eds. Amsterdam, The Netherlands: Kluwer, 1990, 158:43-44. 被引量:1
  • 8W A Imbriale, M J Britcliffe, M Brenner. Gravitational Deformation Measurements of NASA's Deep Space Network 70m Reflector Antennas [R]. NASA IPN Progress Report, PR42-147,2001,1-15. 被引量:1
  • 9Ravi Subrahmanyan. Photogrammetric Measurements of the Gravity Deformation in a Cassegrain Antenna [J]. IEEE Transactions on Antennas and Propagation, 2005, 53(8) :2590-2596. 被引量:1
  • 10David Woody, Eugene Serabyn, Anthony Schinckel. Measurement, Modeling and Adjustment of the 10.4m Diameter Leighton Telescopes [A]. in Proe. SPIE 3357:Advanced Technology MMW, Radio, and Terahertz Telescopes, T. Phillips, Ed. Washington: SPIE, 1998, 474-485. 被引量:1

二级参考文献12

  • 1华慕麟.天线变形曲面的一种拟合方法[J].现代雷达,1994,16(1):75-82. 被引量:16
  • 2叶尚辉 李在贵.天线结构设计[M].北京:国防工业出版社,1980.. 被引量:5
  • 3A V Alpatova,A M Gorin,I N Kad'kalo.Calculation of non-axisymmetrical parabolic reflector antennas[A].The 4th International Conference on Antenna Theory and Techniques,9 ~ 12 Sept.2003,vol.1,248~250. 被引量:1
  • 4S Sinton,Y Rahmat-Samii.Random surface error effects on offset cylindrical reflector antennas[J].IEEE Trans.Antennas Propagat.,2003,51 (6):1331~1337. 被引量:1
  • 5有限元软件ANSYS 7.1联机帮助[Z]. 被引量:1
  • 6C S Wang,B Y Duan,Y Y Qiu,et al..A new approach to fit the distorted reflector antenna and its computation of electrical characteristics[A].The First Asia International Symposium on Mechatronics (AISM'2004),Sept.27~30,2004,Xi'an of China,201~205. 被引量:1
  • 7J W Kim,B S Kim,C W Lee.Computation of the average power pattern of a reflector antenna with random surface errors and misalignment errors[J].IEEE Trans.Antennas Propagat.,1996,44 (7):996~999. 被引量:1
  • 8W A Imbriale.Distortion compensation techniques for large reflector antennas[A].IEEE Proc.of Aerospace Conference,2001,2:10~17. 被引量:1
  • 9章文勋.世纪之交的天线技术[J].电波科学学报,2000,15(1):97-100. 被引量:37
  • 10殷兴辉,徐之材,韩溥,吕静,雷成明.大型天线表面精度实时检测[J].电波科学学报,2000,15(2):229-231. 被引量:11

共引文献23

同被引文献120

引证文献13

二级引证文献56

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部