Adaptive regulation on the thermal deformation of the panel of compact antenna test range
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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.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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Key words:
- finite element methods /
- deformation /
- curve fitting /
- compact antenna test range
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