Mr. Long Shen Profile

Long Shen

at Shanghai Univ

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Proceedings Article | 12 January 2009 Paper

Dynamic modeling and analysis of large-scale antenna structure

Long Shen, Zhenbang Gong, Liang Liu, Sheng Luo, Shiliang Yang

Proceedings Volume 7133, 713310 (2009) https://doi.org/10.1117/12.808385

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In order to do the systematical dynamic modeling and analysis of the Ku-band 16meter antenna satellite ground station used a satellite telecommunication, We calculated the eigenvalues of the the Ku-band 16meter antenna structure, and used the SAP5, a large structure analysis software, to do the finite element calculation and analysis. The first ten band eigenvalues of the antenna structure were calculated; And the results showed that the minimum natural frequency was 2.075 Hz. Furthermore, based on National Military Standard, we measured the system frequency of the Ku-band 16meter antenna satellite ground station and got the minimum natural frequency of 2.249Hz. So there is quite good agreement between the theoretical minimum natural frequency (2.075 Hz) and the measuring minimum natural frequency (2.249Hz). This shows that dynamic modeling and analysis of a large-scale antenna structure system is effective.

Proceedings Article | 12 January 2009 Paper

Precise optical measurement of surface contour of large paraboloid antenna

Long Shen, Zhenbang Gong, Liang Liu, Shiliang Yang

Proceedings Volume 7133, 71333H (2009) https://doi.org/10.1117/12.808391

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A chord-angle method is proposed for the precise optical measurement of the surface contour of large and medium size paraboloid antenna. The possible errors of the proposed method are theoretically analyzed as a whole. The antenna surface measurement precision is controlled and adjusted by measuring the angle and chord length of the measuring target point on the antenna surface. The effectiveness of the proposed method is verified through measurements. Experimental results indicate that the chord-angle method is effective and it has wide application prospect. Compared to the conventional template method, this direct measurement method has higher precision and better applicability.

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