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.
出处
《科学技术与工程》
北大核心
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
关键词
500
m口径球面射电望远镜
结构基频
低通滤波
five-hundred-meter aperture spherical radio telescope the fundamental frequency of structure low-pass filter
