基于FAST馈源舱索系统结构频率的实时滤波方法  

Real-time Filter Method Based on the Structural Frequency of FAST Cabin Cable System

作　　者：徐文华[1] 保宏[1] 米建伟[1] 杨癸庚 

机构地区：[1]西安电子科技大学电子装备结构设计教育部重点实验室,西安710071

出　　处：《科学技术与工程》2014年第7期40-44,共5页Science Technology and Engineering

基　　金：国家自然科学基金项目(50775170;51105290;51035006;50805111;51175398)资助

摘　　要：针对500 m口径球面射电望远镜(FAST)舱索系统具有柔性大、阻尼低及変结构的特点,提出了一种基于频率分析的实时低通数字滤波方法。首先,采用功率谱变换理论对测量数据进行分析在线获得舱索系统基频。其次根据在线获得的舱索系统基频设计了低通数字滤波器,对测量数据进行滤波处理。最后,通过在FAST 5 m模型实验,验证了结构基频计算的准确性和对测量数据滤波的有效性。Due to great flexibility, low damping and varied structure of five-hundred-meter aperture spherical radio telescope（ FAST）, a real-time low-pass digital filter is presented based on the analysis of frequency. Firstly, by the power spectrum transform theory it can obtain the fundamental frequency of cabin-cable system. Then, using the obtained frequency, a low-pass digital filter is designed to filter the measured data. Finally, the results of the experi- ments on the FAST 5 m model show that calculating the fundamental frequency is accurate and filtering the measured data is effective.

关 键 词：500 m口径球面射电望远镜 结构基频 低通滤波 

分 类 号：TP273.21[自动化与计算机技术—检测技术与自动化装置]