上海交通大学学报(英文版) ›› 2016, Vol. 21 ›› Issue (3): 297-306.doi: 10.1007/s12204-016-1725-0

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A Novel De-noising Method Based on Discrete Cosine Transform and Its Application in the Fault Feature Extraction of Hydraulic Pump

WANG Yukui1,2* (王余奎), HUANG Zhijie1 (黄之杰), ZHAO Xucheng1 (赵徐成), ZHU Yi1 (朱 毅), WEI Dongtao1 (魏东涛)   

  1. (1. Air Force Logistics College of PLA, Xuzhou 221000, Jiangsu, China; 2. Ordnance Engineering College of PLA, Shijiazhuang 050003, China)
  • 出版日期:2016-06-30 发布日期:2016-06-30
  • 通讯作者: WANG Yukui (王余奎) E-mail:wyktougao@163.com

A Novel De-noising Method Based on Discrete Cosine Transform and Its Application in the Fault Feature Extraction of Hydraulic Pump

WANG Yukui1,2* (王余奎), HUANG Zhijie1 (黄之杰), ZHAO Xucheng1 (赵徐成), ZHU Yi1 (朱 毅), WEI Dongtao1 (魏东涛)   

  1. (1. Air Force Logistics College of PLA, Xuzhou 221000, Jiangsu, China; 2. Ordnance Engineering College of PLA, Shijiazhuang 050003, China)
  • Online:2016-06-30 Published:2016-06-30
  • Contact: WANG Yukui (王余奎) E-mail:wyktougao@163.com

摘要: Aiming at the existing problems of discrete cosine transform (DCT) de-noising method, we introduce the idea of wavelet neighboring coefficients (WNC) de-noising method, and propose the cosine neighboring coefficients (CNC) de-noising method. Based on DCT, a novel method for the fault feature extraction of hydraulic pump is analyzed. The vibration signal of pump is de-noised with CNC de-noising method, and the fault feature is extracted by performing Hilbert-Huang transform (HHT) to the output signal. The analysis results of the simulation signal and the actual one demonstrate that the proposed CNC de-noising method and the fault feature extraction method have more superior ability than the traditional ones.

关键词: discrete cosine transform (DCT) de-noising method, cosine neighboring coefficients (CNC) de-noising method, hydraulic pump, fault feature extraction

Abstract: Aiming at the existing problems of discrete cosine transform (DCT) de-noising method, we introduce the idea of wavelet neighboring coefficients (WNC) de-noising method, and propose the cosine neighboring coefficients (CNC) de-noising method. Based on DCT, a novel method for the fault feature extraction of hydraulic pump is analyzed. The vibration signal of pump is de-noised with CNC de-noising method, and the fault feature is extracted by performing Hilbert-Huang transform (HHT) to the output signal. The analysis results of the simulation signal and the actual one demonstrate that the proposed CNC de-noising method and the fault feature extraction method have more superior ability than the traditional ones.

Key words: discrete cosine transform (DCT) de-noising method, cosine neighboring coefficients (CNC) de-noising method, hydraulic pump, fault feature extraction

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