Investigation Frequency Resolution Effect on Hilbert Spectrum for Instantaneous Vibration Impact Signal Analysis
Instantaneous impact signal analysis investigation and feature extraction have been broadly investigated by many researchers.How to determine an effective time-frequency distribution analysis method is urgent needed.In this paper,Hilbert spectrum frequency resolution is investigated to show signal typical features according to performance estimation model.Different frequency units for a Hilbert spectrum expression will be investigated on the effect of feature analysis in detail.An estimation model will be constructed to determine the best frequency resolution for signal analysis.By using this estimation,frequency resolution can be determined.This model can improve the performance of Hilbert spectrum to show signal features and accuracy for signal analysis and pattern recognition.To testify the effectiveness of this estimation model,numerical simulation will be used as an example to analyze the accuracy of this model.At the same time,different bearing working conditions pattern recognition based on Hilbert spectrum will be used to testify the effectiveness of this model.
Hilbert spectrum Frequency resolution Estimation model Instantaneous impact
Hongkun Li Zhixin Zhang
School of Mechanical Engineering,Dalian University of Technology,Dalian,P.R.China,116023 State Key L School of Mechanical Engineering,Dalian University of Technology,Dalian,P.R.China,116023
国际会议
The 8th International Conference on Damage Assessment of Structures(DAMAS 2009)(第八届结构损伤评价国际学术会议)
北京
英文
135-142
2009-08-03（万方平台首次上网日期，不代表论文的发表时间）