为制作高精度的静电成形薄膜反射面，首先利用遗传算法与梯度法的两级优化方法对各电极进行布局优化；基于优化思想在给定电压、索拉力和理想膜面的情况下，求解初始膜面的形状参数，获得无应力初始膜面；对无应力初始膜面进行裁剪分析，利用等效力学的方法进行曲面展平，得到平面裁剪片；基于有限元思想将平面裁剪片拼接得到初始膜面状态，施加静电力和索拉力后，得到理论上的拼接反射面最终成形状态。基于上述理论设计0.55m静电成形薄膜反射面天线模型，基于Digimetric软件建立摄像测量系统，对薄膜反射面模型进行形面精度测量，通过反复的测量和形面调整,膜面精度达到0.13mm，验证了高精度制作的可实现性。
Abstract
In order to make a high precision electrostatically controlled deployable membrane antenna (ECDMA), the first thing was to do a layout optimization for all electrodes using the two level optimization method of the genetic algorithm and the gradient method. Based on the optimization idea, shape parameters of an initial membrane surface were solved with given voltage, cable tension and ideal membrane surface to get an initial membrane surface with no stress. The cutting analysis was done for the initial membrane surface with no stress. Pieces of the surface were flatted to get flat cut pieces using the method of equivalent mechanics. Based on the finite element idea, flat cut pieces were spliced to obtain the initial membrane surface state. After static electric force and cable tension were exerted on, the final forming state of the theoretical spliced reflector was gained. Based on the theory mentioned above, a 0.55m long ECDMA model was designed, a camera measurement system was built based on the software Digimetric. The shape surface precision measurement was done for the ECDMA model. It was shown that after repeated measurement and profile adjustment, its membrane surface precision reaches 0.13mm; the realizability of a high precision making is verified.
关键词
静电成形薄膜反射面天线 /
反射面设计 /
成形模拟 /
精度测量
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Key words
electrostatically controlled deployable membrane antenna (ECDMA) /
reflector design /
simulation of forming /
precision measurement
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参考文献
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