Star position correction of dynamic star simulator based on TFT-LCD
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摘要:介绍了基于TFT-LCD的动态星模拟器的工作原理及星点位置误差的计算方法。利用经纬仪对动态星模拟器显示的网格星点进行测量,计算了各星点的位置误差及修正系数。对网格上星点的修正系数进行分区处理,并利用Matlab软件对各分区的修正系数进行曲线拟合,得到修正系数关于星点位置(方位或俯仰)坐标的方程。结果表明,修正后星点的位置误差均小于35,满足动态星模拟器的设计要求。Abstract:This paper describes the working principle of the dynamic star simulator based on a TFT-LCD and the calculation of the revised star angular distance error. A theodolite is used to measure the star point on the grid shown by the dynamic star simulator, then the position error correction factor of each star point is calculated based on the measured data. The correction coefficient of the star point on the grid is partitioned, and Matlab software is used for the curve fitting of each partition's revised correction coefficients to get the(azimuth or elevation) coordinate equations of the star position. The experimental result shows that the revised star angular distance error is less than 35, which meets the design requirements of the dynamic star simulator.
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Key words:
- dynamic star simulator/
- theodolite/
- curve fitting
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