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基于LabVIEW的零相位滤波器在碰撞实验中的应用
引用本文:文桂林,肖勇.基于LabVIEW的零相位滤波器在碰撞实验中的应用[J].湖南大学学报(自然科学版),2007,34(10):35-38.
作者姓名:文桂林  肖勇
作者单位:湖南大学,汽车车身先进设计与制造国家重点实验室,湖南,长沙,410082
摘    要:针对碰撞实验的信号特点,分析和设计了一种零相位滤波器.结合虚拟仪器软件平台LabVIEW,对采集到的原始信号序列应用时域延拓算法构造新序列,同时利用窗函数法设计零相位滤波器的参数.然后参照汽车碰撞实验法规要求,选取相应的频率等级进行滤波,滤波后再删除扩展序列.实验结果表明,和传统滤波器相比零相位滤波器不仅能够避免相位延时,而且更好地消除了信号起始端的波形失真.

关 键 词:数字滤波器  零相位  虚拟仪器
文章编号:1000-2472(2007)10-0035-04
修稿时间:2006-11-10

Application of Zero-Phase Digital Filter Based on LabVIEW in Impact Test
WEN Gui-lin,XIAO Yong.Application of Zero-Phase Digital Filter Based on LabVIEW in Impact Test[J].Journal of Hunan University(Naturnal Science),2007,34(10):35-38.
Authors:WEN Gui-lin  XIAO Yong
Institution:tate Key Laboratory of Advanced Design and Manufacture for Vehicle Body ,Hunan Univ, Changsha,Hunan 410082, China
Abstract:Aiming at the signal characteristic of impact test,a zero-phase digital filter was analyzed and designed.Based on the virtual instrument software LabVIEW,a new signal sequence was constructed from the original data using the time domain extension algorithm,and the parameters of the zero-phase filter were determined by the method of window function.Then,the corresponding frequency rank was selected according to the regulation of automotive crash test.After the filter,the extension sequence was deleted.The test results have shown that the zero-phase digital filter,compared with usual digital filters, can not only avoid phase-shifting,but also improve the wave distortion of start section.
Keywords:digital filters  zero phase  virtual instrument
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