【作者】 段磊；

【导师】 段宝岩；

【作者基本信息】 西安电子科技大学 ， 控制理论与控制工程， 2008， 硕士

【摘要】 在FAST项目的预研究中,Leica全站仪在动态跟踪测量状态下存在的误差、时滞和采样间隔不稳定等不足,给馈源跟踪控制带来许多困难。因此,提高测量精度是一个需要解决的重要技术问题。具体内容如下:1、针对FAST中存在的测量误差问题,本文设计了一种基于频率分析的滤波器,通过数值试验,验证了该滤波器具有良好的滤波能力;2、针对FAST馈源支撑系统的运动特征,建立了馈源舱的运动方程,在本文提出的基于频率分析的滤波的基础上,对滤波数据进行了预测,通过数值试验验证了预测数据的有效性;3、通过大射电望远镜LT-5m模型,发现了测量仪器Leica激光全站仪在动态跟踪测量初期存在3-7mm的数据跳变问题,找到了问题的来源,提出了解决方案,并通过实验有效的消除了数据的跳变,为以后的实验提供了参考。更多还原

【Abstract】 In pre-study of FAST(Five-hundred Meter Aperture Spherical Telescope), there are some disadvantages with Leica laser total stations,such as error,time lag and the instability of sampling interval in dynamic tracking measurement which bring many difficulties to tracking control of feedback.Therefore, the improvement of measurement accuracy is an important technical problem which is need to be solved.The main research works can be described as follows.1. This paper design a filter based on frequency analysis aimed at the measurement error in FAST.The experiment results prove that this filter has good filtering ability;2. This paper establishes the moving equations aimed at the moving characteristics of feedback supporting system in FAST.Based on the filter which this paper proposed,the filtering datas are forecasted.The experiment results prove the effect of the forecast datas;3. Through large radio telescope (LT) 5m model, the problem of 3-7mm data jump for leica laser total stations was occurred during the initial stages of dynamic tracking measurement. The cause of the problem was found through the experiments. The solution was provided and the experiments eliminated the data jump effectively. It provides reference for the future experiments.更多还原