| 轴流式通风机叶片动频的获取方法 |
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| 引用本文： | 张永超,张振东,张永建,刘圆.轴流式通风机叶片动频的获取方法[J].煤炭科学技术,2011,39(12):76-79. |
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| 作者姓名： | 张永超 张振东 张永建 刘圆 |
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| 作者单位： | 1. 山东科技大学机械电子工程学院,山东青岛,266510
2. 山东科技大学机械电子工程学院,山东青岛266510／中国煤炭科工集团有限公司太原研究院,山西太原030006 |
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| 基金项目： | 新汶矿业集团有限责任公司资助项目(2010-02) |
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| 摘 要： | 在轴流式通风机叶片动频获取的过程中,由于2只叶尖定时传感器采样数据的欠采样和非均匀采样的特性,使得叶片动频的获取不能通过简单的傅里叶变换求得,因此提出通过对采样数据的插零、重采样处理,再利用傅里叶变换的性质得到差频,进而获得叶片动频的方法。为了验证该方法在轴流式通风机叶片测振上应用的可行性,针对某一型号的通风机,用软件模拟了叶片的振动信号,并用该方法对非均匀采样数据进行了处理,2只叶片动频的相对误差分别为0.05%和0.012%,表明该方法对于轴流式通风机叶片测振是可行的。
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| 关 键 词： | 非接触式测量 欠采样 非均匀采样 叶片动频 仿真 |
Method to Obtain Dynamic Frequency of Blade on Axial-Flow Type Ventilator |
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| ZHANG Yong-chao,ZHANG Zhen-dong,ZHANG Yong-jian,LIU Yuan.Method to Obtain Dynamic Frequency of Blade on Axial-Flow Type Ventilator[J].Coal Science and Technology,2011,39(12):76-79. |
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| Authors: | ZHANG Yong-chao ZHANG Zhen-dong ZHANG Yong-jian LIU Yuan |
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| Affiliation: | ZHANG Yong-chao1,ZHANG Zhen-dong1,2,ZHANG Yong-jian1,LIU Yuan1(1.School of Mechanic and Electronic Engineering,Shandong University of Science and technology,Qingdao 266510,China,2.Taiyuan Research Institute,China Coal Technology and Engineering Group Corp.,Taiyuan 030006,China) |
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| Abstract: | During the dynamic frequency obtaining process of the blade on the axial-flow type ventilator,due to the shortage sampling and inhomogeneous sampling features of the sampling data by the timer sensors on the two blade tips,thus the blade dynamic frequency would not be obtained with the simple Fourier variation.Therefore with the zero inserted in the sampling data and the re-sampling,the Fourier variation property could be applied to obtain the difference frequency and the method of the blade dynamic frequen... |
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| Keywords: | non-contact measurement short of sampling inhomogeneous sampling blade dynamic frequency simulation |
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