| 紧缩场反射面板热变形的适应性调整 |
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| 引用本文： | 王兆峻,陈五一.紧缩场反射面板热变形的适应性调整[J].北京航空航天大学学报,2005,31(1):86-88. |
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| 作者姓名： | 王兆峻 陈五一 |
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| 作者单位： | 北京航空航天大学 机械工程及自动化学院, 北京 100083 |
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| 摘 要： | 随着季节的变化,紧缩场反射面板的温度在15~25℃之间变化.热变形量往往超出允许的误差.利用Marc有限元软件,分析了紧缩场在温度、重力和反向力等作用下的变形.针对变形最严重的工况下的变形,用最小二乘法对变形后的数据进行二次多项式曲线拟合,得出与变形后的反射面相一致的新的母线方程和焦距.仿真结果表明调整馈源位置,能够适合于面板焦距的变化.
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| 关 键 词： | 有限元法 变形 曲线拟合 紧缩场 |
| 文章编号： | 1001-5965(2005)01-0086-03 |
| 收稿时间： | 2003-07-22 |
| 修稿时间： | 2003年7月22日 |
Adaptive regulation on the thermal deformation of the panel of compact antenna test range |
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| Wang Zhaojun,Chen Wuyi.Adaptive regulation on the thermal deformation of the panel of compact antenna test range[J].Journal of Beijing University of Aeronautics and Astronautics,2005,31(1):86-88. |
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| Authors: | Wang Zhaojun Chen Wuyi |
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| Institution: | School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
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| Abstract: | The temperature of compact antenna test range may vary from 15℃ to 25℃accompanied by the seasons. The thermal deformation often exceeds the allowed error. Its deformation under the loads of temperature、gravity and reverse force was analyzed with MSC.MARC. For the worst case, the data of the deformed points were used to form a new conic using least-square method. A new generatrix and focus of the reflecting panel that are consistent with the deformed generatrix of the penal were drawn. The results indicate that the regulation of the signal source can fit in with the variation of the focus. |
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| Keywords: | finite element methods deformation curve fitting compact antenna test range |
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