一种振动能级梳状滤波精确计算方法

孙 涛; 高慧中

doi:10.11993/j.issn.1673-1948.2015.02.009

一种振动能级梳状滤波精确计算方法

doi: 10.11993/j.issn.1673-1948.2015.02.009

孙涛,
高慧中

中国船舶重工集团公司第705研究所, 陕西西安, 710075

基金项目: 海军装备重大专项预研(40110), 船舶预研支撑技术基金(14J4.4.1)

详细信息

作者简介:
孙涛(1977-), 男, 博士, 高级工程师, 主要研究方向为测试测量技术、振源识别与故障诊断、多物理场耦合仿真、动力试验技术及其系统设计

中图分类号: TJ630.32; TB523
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出版历程
- 收稿日期: 2014-11-18
- 修回日期: 2015-01-08
- 刊出日期: 2015-04-20

An Accurate Computation Method of Vibration Level Based on Comb Band-stop Filter

The 705 Research Institute, China Shipbuilding Industry Corporation, Xi’an 710075, China

摘要

摘要: 现有的1/3倍频程处理方法都是以测试信号不包含明显干扰为前提, 因而在处理带噪声信号时存在一定先天不足。针对现场测量信号中经常存在规律性噪声(噪声线谱呈梳状等间隔分布)的现象, 提出了以Fourier核函数为基函数的梳状带阻滤波器与1/3倍频程有机结合来消除规律性噪声对结果影响的方法。该方法能够在频域下直接消除干扰并计算滤波后信号的振动能级, 计算量小、精度高。通过对动力装置功率试验中出现规律性噪声的振动信号进行合理修正, 重新评估其振级水平, 避免了多次重复试验, 节约了试验费用。
- 动力装置 /
- 振动噪声 /
- 信号处理 /
- 1/3倍频程
Abstract: The existing 1/3 octave spectrum approaches are usually supposed to test signals without interference. Obviously, this strategy is no more effective when confronted with the signals containing band noise. In this paper, aiming at the regular noise interference, such as comb noise, the Fourier kernel function is employed to construct a comb band- stop filter, and further the filter is combined with the 1/3 octave spectrum to remove the effects exerted by noise. The proposed strategy can remove the interference in frequency domain and calculate the filtered vibration level more efficiently and conveniently, compared with the existing approaches. For the vibration signals with regular noise interference in the power test of a propulsion system, proper revision and consequent reevaluation can avoid repeated tests and save test costs
- propulsion system /
- vibration noise /
- signal process /
- 1/3 octave spectrum

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参考文献(10)

[1]	孙涛, 高爱军, 王炜, 等. 一种多测点变工况倍频程快速处理方法[J]. 鱼雷技术, 2011, 19(6): 455-458. Sun Tao, Gao Ai-jun, Wang Yi, et al. A Fast CPB Pro- cessing Method of Off-design Vibration and Noise Data from Multiple Channels[J]. Torpedo Technology, 2011, 19(6): 455-458.
[2]	成峰, 周宝焜, 程利青, 等. 基于MATLAB的1/3倍频程FIR数字滤波器设计[J]. 福州大学学报(自然科学版), 2003, 31(2): 160-165. Cheng Feng, Zhou Bao-kun, Cheng Li-qing, et al. Design of Third-Octave Band FIR Digital Filters Based on MATLAB[J]. Journal of Fuzhou University(Natural Sci- ence), 2003, 31(2): 160-165.
[3]	Flink J H, Bertrand J. Specrrum Analyzer Using Digital Filters: US, 747053[P]. 1976-12-3.
[4]	孙涛, 高爱军, 李留成. 直接获得同工况比邻的多测点变工况倍频程谱阵的方法: 中国, ZL201110012751.1[P]. 2014-3-14.
[5]	李志勇, 危韧勇, 张涛. 基于Morlet组合小波的梳状滤波与包络检波方法[J]. 中南大学学报(自然科学版), 2006, 37(2): 336-340. Li Zhi-yong, Wei Ren-yong, Zhang Tao. A Comb-filter and Envelope-demodulation Method Based on Combined Morlet Wavelets[J]. Journal of Central South University (Science and Technology), 2006, 37(2): 336-340.
[6]	赵俊龙, 郭正刚, 张志新, 等. 梳状滤波器在滚动轴承早期故障诊断中的应用[J]. 振动与冲击, 2008, 27(12): 171-174. Zhao Jun-long, Guo Zheng-gang, Zhang Zhi-xin, et al. Application of Comb Fil the in Fault Early Diagnosis of Rolling Element Bearing[J]. Journal of Vibration and Shock, 2008, 27(12): 171-174.
[7]	侯者非, 杨杰, 王克成, 等. 改进梳状包络检波方法在滚动轴承故障诊断中的应用[J]. 煤矿机械, 2010, 31(2): 229-232. Hou Zhe-fei, Yang Jie, Wang Ke-cheng, et al. Novel Comb-filter and Envelope-demodulation Method Applied in Fault Diagnosis of Rolling Element Bearing[J]. Coal Mine Machinery, 2010, 31(2): 229-232.
[8]	Bruce A, Donoho D, Gao Hongye. Wavlete analysis[C]// IEEE Spectrum, 1996: 26-35.
[9]	Grossmann A, Morlet J. Decomposition of Hardy Fun- ctions into Square Integrable Wavelets of Constant Shape [J]. SIAM Journal on Mathematical Analysis, 1984, 15(4): 14.
[10]	王济. MATLAB在振动信号处理中的应用[M]．北京: 中国水利水电出版社, 2006: 134-135.